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Труды сотрудников Института теплофизики УрО РАН
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Труды сотрудников ЦНБ УрО РАН
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Каталог библиотеки ИЭРиЖ УрО РАН
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1.

Вид документа : Статья из журнала
Шифр издания : 53/G 15
Автор(ы) : Galashev A. E., Chukanov V. N.
Заглавие : Computer Simulation of the Stability of Water Clusters Containing Nitrogen Oxide Molecules
Место публикации : Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2004. - Vol. 66, № 5. - С. 523-530
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): water clusters
Аннотация: The stability of water clusters containing nitrogen oxide molecules is studied by the molecular dynamics method. The composition and size of thermodynamically stable heteroclusters are determined. The inclusion of two molecules of nitrogen oxide into aggregates containing seven or more water molecule increases the cluster stability. The correlation between the stability of heteroclusters and the ratio of self-diffusion coefficients of molecules of different kinds is observed. The real part of the cluster permittivity is maximal in the vicinity of the frequency of 200 cm–1. The inclusion of nitrogen oxide molecules into water clusters increases the characteristic frequency of dielectric relaxation. In general, heteroclusters are more stable with respect to perturbations caused by an external electric field than pure clusters with the same number of water molecules. The clusterization of water vapors accompanied by absorption of polar molecules of impurity favors a decrease in the greenhouse effect.
\\\\Expert2\\NBO\\Colloid Journal\\2004, V.66, N5,523.pdf
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2.

Вид документа : Статья из журнала
Шифр издания : 53/G 15
Автор(ы) : Galashev A. E., Chukanov V. N.
Заглавие : Computer Simulation of the Stability of Water Clusters Containing Nitrogen Oxide Molecules
Место публикации : Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2004. - Vol. 66, № 5. - С. 523-530
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): water clusters
Аннотация: The stability of water clusters containing nitrogen oxide molecules is studied by the molecular dynamics method. The composition and size of thermodynamically stable heteroclusters are determined. The inclusion of two molecules of nitrogen oxide into aggregates containing seven or more water molecule increases the cluster stability. The correlation between the stability of heteroclusters and the ratio of self-diffusion coefficients of molecules of different kinds is observed. The real part of the cluster permittivity is maximal in the vicinity of the frequency of 200 cm–1. The inclusion of nitrogen oxide molecules into water clusters increases the characteristic frequency of dielectric relaxation. In general, heteroclusters are more stable with respect to perturbations caused by an external electric field than pure clusters with the same number of water molecules. The clusterization of water vapors accompanied by absorption of polar molecules of impurity favors a decrease in the greenhouse effect.
\\\\Expert2\\NBO\\Colloid Journal\\2004, V.66, N5,523.pdf
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3.

Вид документа : Статья из журнала
Шифр издания : 53/Z 19
Автор(ы) : Zakharov M. S., Smolyak B. M., Ermakov G. V.
Заглавие : Effect of External Nonuniform Magnetic Field on Flux Creep Process in Superconductor
Место публикации : Journal of Superconductivity and Novel Magnetism. - 2012. - Article in Press. - С. 1-4
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): critical state--magnetic relaxation --superconductors
Аннотация: The effect of an external nonuniform magnetic field on the flux creep rate in a high-temperature superconductor with trapped magnetic flux was studied. The magnetic relaxation was suppressed when the superconductor was put into a field of permanent magnets or when it approached a ferromagnet. The effect arises when the field sources (being magnetized, the ferromagnet produces its own field) are placed near the superconductor surface, where the flux line ends are located. For these cases, we carried out the calculations of vortex and current density distributions, which demonstrate that reverse currents flow in the near-surface regions of the sample. This verifies the hypothesis suggested earlier about the influence of counter Lorentz forces retarding the creep of the vortices. In the interpretation of the results, we also take into consideration the magnetic force acting on the vortex ends in the external nonuniform magnetic field that allows us to explain the experimental results, in which the current structure in the sample is unipolar
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4.

Вид документа : Статья из журнала
Шифр издания : 53/Z 19
Автор(ы) : Zakharov M. S., Smolyak B. M., Ermakov G. V.
Заглавие : Effect of External Nonuniform Magnetic Field on Flux Creep Process in Superconductor
Место публикации : Journal of Superconductivity and Novel Magnetism. - 2012. - Article in Press. - С. 1-4
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): critical state--magnetic relaxation --superconductors
Аннотация: The effect of an external nonuniform magnetic field on the flux creep rate in a high-temperature superconductor with trapped magnetic flux was studied. The magnetic relaxation was suppressed when the superconductor was put into a field of permanent magnets or when it approached a ferromagnet. The effect arises when the field sources (being magnetized, the ferromagnet produces its own field) are placed near the superconductor surface, where the flux line ends are located. For these cases, we carried out the calculations of vortex and current density distributions, which demonstrate that reverse currents flow in the near-surface regions of the sample. This verifies the hypothesis suggested earlier about the influence of counter Lorentz forces retarding the creep of the vortices. In the interpretation of the results, we also take into consideration the magnetic force acting on the vortex ends in the external nonuniform magnetic field that allows us to explain the experimental results, in which the current structure in the sample is unipolar
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5.

Вид документа :
Шифр издания : 53/S 68
Автор(ы) : Smolyak B. M., Perelshtein G. N., Ermakov (Yermakov) G. V.
Заглавие : Effects of relaxation in levitating superconductors
Место публикации : Cryogenics. - 2002. - Vol.42, №10. - С. 635-644
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): superconductors--flux creep -- magnetic levitation
Аннотация: The effect of the magnetic flux creep on the levitation stability of high-temperature superconductors was studied. It was shown experimentally that under a unipolar magnetization the levitation force decreased at a logarithmic velocity characteristic of the creep process. If the current structure was bi- or multi-polar one, which was formed in a sample exposed to a reversing external magnetic field, the force remained unchanged during a certain period of time. The theory of relaxation of magnetization and force for a partial and full penetration of the critical state was considered. It was shown that relaxation decelerated sharply if the region with a current producing the main magnetization was far from the superconductor surface. A concept of an open and internal magnetic relaxation was introduced. The time of the internal relaxation for different reverse depths was estimated. The calculated values approached the experimental values of the levitation stabilization time
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6.

Вид документа :
Шифр издания : 53/S 68
Автор(ы) : Smolyak B. M., Perelshtein G. N., Ermakov (Yermakov) G. V.
Заглавие : Effects of relaxation in levitating superconductors
Место публикации : Cryogenics. - 2002. - Vol.42, №10. - С. 635-644
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): superconductors--flux creep -- magnetic levitation
Аннотация: The effect of the magnetic flux creep on the levitation stability of high-temperature superconductors was studied. It was shown experimentally that under a unipolar magnetization the levitation force decreased at a logarithmic velocity characteristic of the creep process. If the current structure was bi- or multi-polar one, which was formed in a sample exposed to a reversing external magnetic field, the force remained unchanged during a certain period of time. The theory of relaxation of magnetization and force for a partial and full penetration of the critical state was considered. It was shown that relaxation decelerated sharply if the region with a current producing the main magnetization was far from the superconductor surface. A concept of an open and internal magnetic relaxation was introduced. The time of the internal relaxation for different reverse depths was estimated. The calculated values approached the experimental values of the levitation stabilization time
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7.

Вид документа :
Шифр издания : 53/S 68
Автор(ы) : Smolyak B. M., Ermakov G. V.
Заглавие : Elimination of magnetic relaxation in superconductors on approaching a ferromagnet
Место публикации : Physica C. - 2010. - Vol.470, №3. - С. 218-220
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): magnetic relaxation --ferromagnet--magnetic structure
Аннотация: It is found that magnetic relaxation is suppressed in a high-temperature superconductor when it approaches a ferromagnet. It is supposed that this phenomenon results from formation of a nonequilibrium magnetic structure, in which counter driving forces act in different regions
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8.

Вид документа :
Шифр издания : 53/S 68
Автор(ы) : Smolyak B. M., Ermakov G. V.
Заглавие : Elimination of magnetic relaxation in superconductors on approaching a ferromagnet
Место публикации : Physica C. - 2010. - Vol.470, №3. - С. 218-220
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): magnetic relaxation --ferromagnet--magnetic structure
Аннотация: It is found that magnetic relaxation is suppressed in a high-temperature superconductor when it approaches a ferromagnet. It is supposed that this phenomenon results from formation of a nonequilibrium magnetic structure, in which counter driving forces act in different regions
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9.

Вид документа : Статья из журнала
Шифр издания : 53/K 79
Автор(ы) : Koverda V. P., Skokov V. N.
Заглавие : Maximum entropy and stability of a random process with a 1 f power spectrum under deterministic action
Место публикации : Physica A. - 2012. - Vol.391, №23. - С. 5850-5857
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): 1/f-noise--maximum entropy principle--stochastic equations
Аннотация: The principle of maximum entropy has been used to analyze the stability of the resulting process observed during the interaction of a random process with a 1f spectrum and a deterministic action in lumped and distributed systems of nonlinear stochastic differential equations describing the coupled nonequilibrium phase transitions. Under the action of a harmonic force the stable resulting process is divided into two branches depending on the amplitude of the harmonic force. Under the action of exponential relaxation in a lumped system with an increase in the dumping coefficient the power spectrum of the resulting process becomes a spectrum of the Lorentz
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10.

Вид документа : Статья из журнала
Шифр издания : 53/K 79
Автор(ы) : Koverda V. P., Skokov V. N.
Заглавие : Maximum entropy and stability of a random process with a 1 f power spectrum under deterministic action
Место публикации : Physica A. - 2012. - Vol.391, №23. - С. 5850-5857
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): 1/f-noise--maximum entropy principle--stochastic equations
Аннотация: The principle of maximum entropy has been used to analyze the stability of the resulting process observed during the interaction of a random process with a 1f spectrum and a deterministic action in lumped and distributed systems of nonlinear stochastic differential equations describing the coupled nonequilibrium phase transitions. Under the action of a harmonic force the stable resulting process is divided into two branches depending on the amplitude of the harmonic force. Under the action of exponential relaxation in a lumped system with an increase in the dumping coefficient the power spectrum of the resulting process becomes a spectrum of the Lorentz
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11.

Вид документа : Статья из журнала
Шифр издания : 53/S 68
Автор(ы) : Smolyak B. M., Zakharov M. S.
Заглавие : On the force relaxation in the magnetic levitation system with a high-tc superconductor [Электронный ресурс]
Место публикации : Superconductor Science and Technology. - 2014. - Vol. 27, № 5. - С. 055018 (1-5)
Систем. требования: http://iopscience.iop.org.sci-hub.org/0953-2048/27/5/055018
Примечания : Bibliogr. : p. 055018-5 (17 ref.). - 14.10.2014
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): levitation--magnetic relaxation --bulk hightemperature
Аннотация: The effect of magnetic flux creep on the lift force in a magnet/superconductor system was studied. It was shown experimentally that in the case of real levitation (when a levitating object bears only on a magnetic field) the suspension height and consequently the lift force did not change over a long period of time. When the levitating object is fixed for some time (i.e. a rigid constraint is imposed on it), the levitation height decreases after removal of the external constraint. It is assumed that free oscillations of the levitating object slow down the flux creep process, which is activated when these oscillations are suppressed
\\\\expert2\\NBO\\Superconductor Science and Technology\\2014. V. 27, N 5. P. 055018.pdf
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12.

Вид документа : Статья из журнала
Шифр издания : 53/S 68
Автор(ы) : Smolyak B. M., Zakharov M. S.
Заглавие : On the force relaxation in the magnetic levitation system with a high-tc superconductor [Электронный ресурс]
Место публикации : Superconductor Science and Technology. - 2014. - Vol. 27, № 5. - С. 055018 (1-5)
Систем. требования: http://iopscience.iop.org.sci-hub.org/0953-2048/27/5/055018
Примечания : Bibliogr. : p. 055018-5 (17 ref.). - 14.10.2014
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): levitation--magnetic relaxation --bulk hightemperature
Аннотация: The effect of magnetic flux creep on the lift force in a magnet/superconductor system was studied. It was shown experimentally that in the case of real levitation (when a levitating object bears only on a magnetic field) the suspension height and consequently the lift force did not change over a long period of time. When the levitating object is fixed for some time (i.e. a rigid constraint is imposed on it), the levitation height decreases after removal of the external constraint. It is assumed that free oscillations of the levitating object slow down the flux creep process, which is activated when these oscillations are suppressed
\\\\expert2\\NBO\\Superconductor Science and Technology\\2014. V. 27, N 5. P. 055018.pdf
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13.

Вид документа : Статья из журнала
Шифр издания : 53/R 45
Автор(ы) : Reshetnikov A. V., Skokov V. N., Koverda V. P.
Заглавие : Relaxation and power spectra of low-frequency fluctuations in foams
Место публикации : Journal of Applied Mechanics and Technical Physics. - 2012. - Vol.53, №6. - С. 834-838
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): foam formation--low-frequency fluctuations--power spectrum
Аннотация: The dynamics of foam formation in a water-glycerin solution was studied to establish the relationship between the relaxation characteristics and the fluctuation power spectrum for a stochastic process. Foaming occurred during the dissociation of the gas-saturated solution and during bubbling of the solution through a porous filter. Two types of relaxation of the foam-exponential and power-law-were revealed. The power-law type of relaxation was observed upon exposure to ultrasound. Relationships between the type of relaxation and the distribution of lowfrequency fluctuations and power spectra was established
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14.

Вид документа : Статья из журнала
Шифр издания : 53/R 45
Автор(ы) : Reshetnikov A. V., Skokov V. N., Koverda V. P.
Заглавие : Relaxation and power spectra of low-frequency fluctuations in foams
Место публикации : Journal of Applied Mechanics and Technical Physics. - 2012. - Vol.53, №6. - С. 834-838
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): foam formation--low-frequency fluctuations--power spectrum
Аннотация: The dynamics of foam formation in a water-glycerin solution was studied to establish the relationship between the relaxation characteristics and the fluctuation power spectrum for a stochastic process. Foaming occurred during the dissociation of the gas-saturated solution and during bubbling of the solution through a porous filter. Two types of relaxation of the foam-exponential and power-law-were revealed. The power-law type of relaxation was observed upon exposure to ultrasound. Relationships between the type of relaxation and the distribution of lowfrequency fluctuations and power spectra was established
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15.

Вид документа :
Шифр издания : 53/S 68
Автор(ы) : Smolyak B. M., Ermakov G. V., Zakharov M. S.
Заглавие : Retardation of the Magnetic Relaxation in High-Temperature Superconductors Near a Ferromagnet
Место публикации : Journal of Superconductivity and Novel Magnetism. - 2011. - Vol.24, №1-2. - С. 325-329
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): high-t c superconductors --trapped flux --magnetic relaxation
Аннотация: The creep of a magnetic flux trapped in a bulk high-temperature superconductor has been studied. It has been found that the magnetic relaxation is retarded when the superconductor is placed near a ferromagnet. The value of the retardation effect depends on the sequence of magnetization and the approach of the superconductor to a ferromagnet. The magnetic relaxation is fully suppressed when a superconducting sample first is magnetized and then is brought close to a ferromagnet. An interpretation of this effect has been discussed. Being magnetized, a ferromagnet produces its own magnetic field. While penetrating into a disk sample through its planes, the ferromagnet field induces screening currents, which circulate oppositely to the current that arises upon trapping of the magnetic flux. As a result, the stability of the magnetic structure is sharply improved since opposite driving forces can act on different sections of the vortices
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16.

Вид документа :
Шифр издания : 53/S 68
Автор(ы) : Smolyak B. M., Ermakov G. V., Zakharov M. S.
Заглавие : Retardation of the Magnetic Relaxation in High-Temperature Superconductors Near a Ferromagnet
Место публикации : Journal of Superconductivity and Novel Magnetism. - 2011. - Vol.24, №1-2. - С. 325-329
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): high-t c superconductors --trapped flux --magnetic relaxation
Аннотация: The creep of a magnetic flux trapped in a bulk high-temperature superconductor has been studied. It has been found that the magnetic relaxation is retarded when the superconductor is placed near a ferromagnet. The value of the retardation effect depends on the sequence of magnetization and the approach of the superconductor to a ferromagnet. The magnetic relaxation is fully suppressed when a superconducting sample first is magnetized and then is brought close to a ferromagnet. An interpretation of this effect has been discussed. Being magnetized, a ferromagnet produces its own magnetic field. While penetrating into a disk sample through its planes, the ferromagnet field induces screening currents, which circulate oppositely to the current that arises upon trapping of the magnetic flux. As a result, the stability of the magnetic structure is sharply improved since opposite driving forces can act on different sections of the vortices
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17.

Вид документа :
Шифр издания : 53/B 16
Автор(ы) : Baidakov V. G., Protsenko S.P., Kozlova Z. R.
Заглавие : Shear and bulk viscosity in stable and metastable states of a Lennard-Jones liquid
Место публикации : Chemical Physics Letters. - 2011. - Vol.135, №4-6. - С. 166-170
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): molecular-dynamics simulation--lennard-jones liquid--liquid–crystal
Аннотация: Molecular-dynamics simulations have been employed to calculate the coefficients of shear and bulk viscosity of a Lennard-Jones liquid in the temperature range T∗ = 0.4–2.0 in stable and metastable states. Penetration into the region of superheated states, as distinct from supercooled ones, does not lead to any essential changes in the shear viscosity. The bulk viscosity increases at the approach to the lines of liquid–crystal and liquid–gas equilibrium and in the metastable states. The evolution of autocorrelation functions of the components of the pressure tensor and the characteristic times of the viscoelastic relaxation of both a superheated and supercooled liquids has been investigated
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18.

Вид документа :
Шифр издания : 53/B 16
Автор(ы) : Baidakov V. G., Protsenko S.P., Kozlova Z. R.
Заглавие : Shear and bulk viscosity in stable and metastable states of a Lennard-Jones liquid
Место публикации : Chemical Physics Letters. - 2011. - Vol.135, №4-6. - С. 166-170
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): molecular-dynamics simulation--lennard-jones liquid--liquid–crystal
Аннотация: Molecular-dynamics simulations have been employed to calculate the coefficients of shear and bulk viscosity of a Lennard-Jones liquid in the temperature range T∗ = 0.4–2.0 in stable and metastable states. Penetration into the region of superheated states, as distinct from supercooled ones, does not lead to any essential changes in the shear viscosity. The bulk viscosity increases at the approach to the lines of liquid–crystal and liquid–gas equilibrium and in the metastable states. The evolution of autocorrelation functions of the components of the pressure tensor and the characteristic times of the viscoelastic relaxation of both a superheated and supercooled liquids has been investigated
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19.

Вид документа : Статья из журнала
Шифр издания : 53/S 68
Автор(ы) : Smolyak B. M., Zakharov M. S.
Заглавие : Slowing-down of the vortex motion in the flux creep process by counter forces exerted on the vortex ends
Место публикации : Superconductor Science and Technology. - 2012. - Vol.25, №12. - С. 125019
Примечания : Bibliogr. : p. 125019 (15 ref.)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): bipolar currents--critical state--ferromagnets
Аннотация: The effect of the suppression of flux creep in a high-temperature superconductor by counter forces exerted on the vortex ends was studied. These forces, acting in the opposite direction to the process of vortex diffusion, arise when the magnetized sample is put into a nonuniform magnetic field. The source of the field should be placed near the surface of the superconductor where the flux line ends are located. The critical states in a disk sample placed near a ferromagnet or permanent magnets were calculated. The results of the calculations verify the bipolar current structure and, therefore, the existence of counter Lorentz forces in the near-surface region. It was shown that in addition to the Lorentz force it is necessary to take into account the magnetic force acting on the vortex ends in the external nonuniform magnetic field. Depending on the direction of this force, the magnetic relaxation slows down or accelerates
\\\\expert2\\NBO\\Superconductor Science and Technology\\2012. V. 25, N12. P. 125019.pdf
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20.

Вид документа : Статья из журнала
Шифр издания : 53/S 68
Автор(ы) : Smolyak B. M., Zakharov M. S.
Заглавие : Slowing-down of the vortex motion in the flux creep process by counter forces exerted on the vortex ends
Место публикации : Superconductor Science and Technology. - 2012. - Vol.25, №12. - С. 125019
Примечания : Bibliogr. : p. 125019 (15 ref.)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): bipolar currents--critical state--ferromagnets
Аннотация: The effect of the suppression of flux creep in a high-temperature superconductor by counter forces exerted on the vortex ends was studied. These forces, acting in the opposite direction to the process of vortex diffusion, arise when the magnetized sample is put into a nonuniform magnetic field. The source of the field should be placed near the surface of the superconductor where the flux line ends are located. The critical states in a disk sample placed near a ferromagnet or permanent magnets were calculated. The results of the calculations verify the bipolar current structure and, therefore, the existence of counter Lorentz forces in the near-surface region. It was shown that in addition to the Lorentz force it is necessary to take into account the magnetic force acting on the vortex ends in the external nonuniform magnetic field. Depending on the direction of this force, the magnetic relaxation slows down or accelerates
\\\\expert2\\NBO\\Superconductor Science and Technology\\2012. V. 25, N12. P. 125019.pdf
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