Manifestations of the electron orbital moment in high-frequency properties of ferroelectrics with 3d-ions
A phenomenological theory of high-frequency properties of ferroelectric and ferroelectric-ferromagnet with the 3d-ions has been elaborated based on the separate accounting for spin and orbital electron moments, electron and ion contributions to electric polarization. In the ferroelectric state, t...
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| Datum: | 1999 |
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| Sprache: | English |
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Інститут фізики конденсованих систем НАН України
1999
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| Schriftenreihe: | Condensed Matter Physics |
| Online Zugang: | https://nasplib.isofts.kiev.ua/handle/123456789/121019 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Manifestations of the electron orbital moment in high-frequency properties of ferroelectrics with 3d-ions / I.E. Chupis // Condensed Matter Physics. — 1999. — Т. 2, № 4(20). — С. 745-753. — Бібліогр.: 8 назв. — англ. |
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nasplib_isofts_kiev_ua-123456789-1210192025-02-09T12:08:41Z Manifestations of the electron orbital moment in high-frequency properties of ferroelectrics with 3d-ions Прояви електрон-орбітального моменту у високочастотних властивостях сегнетоелектриків з 3d-іонами Chupis, I.E. A phenomenological theory of high-frequency properties of ferroelectric and ferroelectric-ferromagnet with the 3d-ions has been elaborated based on the separate accounting for spin and orbital electron moments, electron and ion contributions to electric polarization. In the ferroelectric state, the existence of the electron orbital moment leads to the breaks in the temperature dependencies of the transverse components of dielectric susceptibility at the ferroelectric transition temperature. The values of these breaks are proportional to the square of the electron part of spontaneous polarization and the parameter of freezing of the orbital moment. Similar breaks and the decrease of the phonon frequencies in the ferroelectric state should occur in the modes which are not soft. Besides, the effect of induction of high-frequency orbital moment by electron part of electric polarization has been predicted as well. This effect would lead to the break in the temperature dependence of paramagnetic susceptibility at ferroelectric transition temperature. In the ferroelectromagnetic state, the electron orbital moment also manifests itself in λ increase of magnetoelectric gyration ( λ is the constant of spin-orbital interaction). Побудована феноменологічна теорія високочастотних властивостей сегнетоелектрика і сегнетоелектрик-феромагнетика з 3d-іонами, яка грунтується на розділеному врахуванні спінового і орбітального електронних моментів, електронних та іонних вкладів до електричної поляризації. У сегнетоелектричному стані існування електронного орбітального момента приводить до розривів поперечних компонент діелектричної сприйнятливості при температурі сегнетоелектричного переходу. Величини цих розривів пропорціональні до квадрата електронної частини спонтанної поляризації і параметра замороження орбітального момента. Аналогічні розриви і зменшення фононних частот у сегнетоелектричному стані мають спостерігатися в модах, які не є м’якими. Крім того, передбачено ефект індукції високочастотного орбітального момента на електронну частину поляризації. Цей ефект може приводити до розриву парамагнітної сприйнятливості при температурі сегнетоелектричного переходу. У фероелектромагнітному стані електронний орбітальний момент проявляє себе в λ зростанні магнітоелектричної гірації ( λ є постійна спін- орбітальної взаємодії). This research was supported by INTAS Grant No. 94-935. 1999 Article Manifestations of the electron orbital moment in high-frequency properties of ferroelectrics with 3d-ions / I.E. Chupis // Condensed Matter Physics. — 1999. — Т. 2, № 4(20). — С. 745-753. — Бібліогр.: 8 назв. — англ. 1607-324X DOI:10.5488/CMP.2.4.745 PACS: 78.20.Ls https://nasplib.isofts.kiev.ua/handle/123456789/121019 en Condensed Matter Physics application/pdf Інститут фізики конденсованих систем НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| description |
A phenomenological theory of high-frequency properties of ferroelectric
and ferroelectric-ferromagnet with the 3d-ions has been elaborated based
on the separate accounting for spin and orbital electron moments, electron
and ion contributions to electric polarization. In the ferroelectric state, the
existence of the electron orbital moment leads to the breaks in the temperature dependencies of the transverse components of dielectric susceptibility
at the ferroelectric transition temperature. The values of these breaks are
proportional to the square of the electron part of spontaneous polarization
and the parameter of freezing of the orbital moment. Similar breaks and
the decrease of the phonon frequencies in the ferroelectric state should
occur in the modes which are not soft. Besides, the effect of induction of
high-frequency orbital moment by electron part of electric polarization has
been predicted as well. This effect would lead to the break in the temperature dependence of paramagnetic susceptibility at ferroelectric transition
temperature. In the ferroelectromagnetic state, the electron orbital moment
also manifests itself in λ increase of magnetoelectric gyration ( λ is the
constant of spin-orbital interaction). |
| format |
Article |
| author |
Chupis, I.E. |
| spellingShingle |
Chupis, I.E. Manifestations of the electron orbital moment in high-frequency properties of ferroelectrics with 3d-ions Condensed Matter Physics |
| author_facet |
Chupis, I.E. |
| author_sort |
Chupis, I.E. |
| title |
Manifestations of the electron orbital moment in high-frequency properties of ferroelectrics with 3d-ions |
| title_short |
Manifestations of the electron orbital moment in high-frequency properties of ferroelectrics with 3d-ions |
| title_full |
Manifestations of the electron orbital moment in high-frequency properties of ferroelectrics with 3d-ions |
| title_fullStr |
Manifestations of the electron orbital moment in high-frequency properties of ferroelectrics with 3d-ions |
| title_full_unstemmed |
Manifestations of the electron orbital moment in high-frequency properties of ferroelectrics with 3d-ions |
| title_sort |
manifestations of the electron orbital moment in high-frequency properties of ferroelectrics with 3d-ions |
| publisher |
Інститут фізики конденсованих систем НАН України |
| publishDate |
1999 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/121019 |
| citation_txt |
Manifestations of the electron orbital moment in high-frequency properties of ferroelectrics with 3d-ions / I.E. Chupis // Condensed Matter Physics. — 1999. — Т. 2, № 4(20). — С. 745-753. — Бібліогр.: 8 назв. — англ. |
| series |
Condensed Matter Physics |
| work_keys_str_mv |
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2025-11-25T22:54:34Z |
| last_indexed |
2025-11-25T22:54:34Z |
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1849804744266088448 |