Magnetization dynamics of electron-impurity systems at paramagnetic resonance
The equation for the magnetization is obtained on the basis of the kinetic equation for an isotropic distribution function of electrons scattering on massive impurity centers in the presence of magnetic and electric fields. The analytical solution of the Cauchy problem for a given initial distributi...
Gespeichert in:
| Veröffentlicht in: | Физика низких температур |
|---|---|
| Datum: | 2002 |
| 1. Verfasser: | |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2002
|
| Schlagworte: | |
| Online Zugang: | https://nasplib.isofts.kiev.ua/handle/123456789/130155 |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Magnetization dynamics of electron-impurity systems at paramagnetic resonance / E.A. Ivanchenko // Физика низких температур. — 2002. — Т. 28, № 2. — С. 168-175. — Бібліогр.: 12 назв. — англ. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
nasplib_isofts_kiev_ua-123456789-130155 |
|---|---|
| record_format |
dspace |
| spelling |
Ivanchenko, E.A. 2018-02-08T14:30:46Z 2018-02-08T14:30:46Z 2002 Magnetization dynamics of electron-impurity systems at paramagnetic resonance / E.A. Ivanchenko // Физика низких температур. — 2002. — Т. 28, № 2. — С. 168-175. — Бібліогр.: 12 назв. — англ. 0132-6414 PACS: 33.35.+r, 75.40.Gb, 76.30.-v, 76.60.Jx, 76.60.-k https://nasplib.isofts.kiev.ua/handle/123456789/130155 The equation for the magnetization is obtained on the basis of the kinetic equation for an isotropic distribution function of electrons scattering on massive impurity centers in the presence of magnetic and electric fields. The analytical solution of the Cauchy problem for a given initial distribution of the magnetization under conditions of paramagnetic resonance is obtained. The exact solutions are found for magnetization dynamics in samples having the forms of an ellipsoid of revolution and a cylinder, as well. The influence of magnetic exchange on the surface of the cylinder (III boundary value problem) is taken into account. The dependence of the magnetization on the static electric field is exponentially decreasing with time, with an exponent proportional to the electric field squared times the diffusion coefficient. For a fixed instant of time the magnetization depends nonlocally on the magnitude and direction of the electric field. The estimated dynamic shift of the forced precession has a nonlocal and nonlinear dependence on the nonuniform distribution of the initial magnetization. This shift is estimated with boundary conditions taken into account and is caused by a field similar to the Suhl-Nakamura field in a paramagnetic medium. The dynamic shift of the free precession has only a nonlocal character. The time and space dependence of the internal field is obtained. All results are expressed in terms of the initial distribution of the magnetization without specifying its functional form and in terms of the propagation function, which depends on the shape of the sample. These results may be used for analysis of spin diffusion in natural and manmade materials and also in magnetometry. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Низкотемпеpатуpный магнетизм Magnetization dynamics of electron-impurity systems at paramagnetic resonance Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Magnetization dynamics of electron-impurity systems at paramagnetic resonance |
| spellingShingle |
Magnetization dynamics of electron-impurity systems at paramagnetic resonance Ivanchenko, E.A. Низкотемпеpатуpный магнетизм |
| title_short |
Magnetization dynamics of electron-impurity systems at paramagnetic resonance |
| title_full |
Magnetization dynamics of electron-impurity systems at paramagnetic resonance |
| title_fullStr |
Magnetization dynamics of electron-impurity systems at paramagnetic resonance |
| title_full_unstemmed |
Magnetization dynamics of electron-impurity systems at paramagnetic resonance |
| title_sort |
magnetization dynamics of electron-impurity systems at paramagnetic resonance |
| author |
Ivanchenko, E.A. |
| author_facet |
Ivanchenko, E.A. |
| topic |
Низкотемпеpатуpный магнетизм |
| topic_facet |
Низкотемпеpатуpный магнетизм |
| publishDate |
2002 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
The equation for the magnetization is obtained on the basis of the kinetic equation for an isotropic distribution function of electrons scattering on massive impurity centers in the presence of magnetic and electric fields. The analytical solution of the Cauchy problem for a given initial distribution of the magnetization under conditions of paramagnetic resonance is obtained. The exact solutions are found for magnetization dynamics in samples having the forms of an ellipsoid of revolution and a cylinder, as well. The influence of magnetic exchange on the surface of the cylinder (III boundary value problem) is taken into account. The dependence of the magnetization on the static electric field is exponentially decreasing with time, with an exponent proportional to the electric field squared times the diffusion coefficient. For a fixed instant of time the magnetization depends nonlocally on the magnitude and direction of the electric field. The estimated dynamic shift of the forced precession has a nonlocal and nonlinear dependence on the nonuniform distribution of the initial magnetization. This shift is estimated with boundary conditions taken into account and is caused by a field similar to the Suhl-Nakamura field in a paramagnetic medium. The dynamic shift of the free precession has only a nonlocal character. The time and space dependence of the internal field is obtained. All results are expressed in terms of the initial distribution of the magnetization without specifying its functional form and in terms of the propagation function, which depends on the shape of the sample. These results may be used for analysis of spin diffusion in natural and manmade materials and also in magnetometry.
|
| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/130155 |
| citation_txt |
Magnetization dynamics of electron-impurity systems at paramagnetic resonance / E.A. Ivanchenko // Физика низких температур. — 2002. — Т. 28, № 2. — С. 168-175. — Бібліогр.: 12 назв. — англ. |
| work_keys_str_mv |
AT ivanchenkoea magnetizationdynamicsofelectronimpuritysystemsatparamagneticresonance |
| first_indexed |
2025-12-07T20:56:14Z |
| last_indexed |
2025-12-07T20:56:14Z |
| _version_ |
1850884462096678912 |