Pressure effect on magnetic susceptibility of LaCoO₃
The effect of pressure on magnetic properties of LaCoO₃ is studied experimentally and theoretically. The pressure dependence of magnetic susceptibility χ of LaCoO₃ is obtained by precise measurements of χ as a function of the hydrostatic pressure P up to 2 kbar in the temperature range from 78 K to...
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| Дата: | 2018 |
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| Автори: | , , , , , , , , |
| Формат: | Стаття |
| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2018
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| Назва видання: | Физика низких температур |
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| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/175990 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Pressure effect on magnetic susceptibility of LaCoO₃ / A.S. Panfilov, G.E. Grechnev, I.P. Zhuravleva, A.A. Lyogenkaya, V.A. Pashchenko, B.N. Savenko, D. Novoselov, D. Prabhakaran, I.O. Troyanchuk // Физика низких температур. — 2018. — Т. 44, № 4. — С. 432-438. — Бібліогр.: 46 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
irk-123456789-175990 |
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irk-123456789-1759902021-02-04T01:31:25Z Pressure effect on magnetic susceptibility of LaCoO₃ Panfilov, A.S. Grechnev, G.E. Zhuravleva, I.P. Lyogenkaya, A.A. Pashchenko, V.A. Savenko, B.N. Novoselov, D. Prabhakaran, D. Troyanchuk, I.O. Низкотемпеpатуpный магнетизм The effect of pressure on magnetic properties of LaCoO₃ is studied experimentally and theoretically. The pressure dependence of magnetic susceptibility χ of LaCoO₃ is obtained by precise measurements of χ as a function of the hydrostatic pressure P up to 2 kbar in the temperature range from 78 K to 300 K. A pronounced magnitude of the pressure effect is found to be negative in sign and strongly temperature dependent. The obtained experimental data are analysed by using a two-level model and DFT+U calculations of the electronic structure of LaCoO₃ . In particular, the fixed spin moment method was employed to obtain a volume dependence of the total energy difference Δ between the low spin and the intermediate spin states of LaCoO₃ . Analysis of the obtained experimental χ(P) dependence within the two-level model, as well as our DFT+U calculations, have revealed the anomalous large decrease in the energy difference Δ with increasing of the unit cell volume. This effect, taking into account a thermal expansion, can be responsible for the temperatures dependence of Δ, predicting its vanishing near room temperature. 2018 Article Pressure effect on magnetic susceptibility of LaCoO₃ / A.S. Panfilov, G.E. Grechnev, I.P. Zhuravleva, A.A. Lyogenkaya, V.A. Pashchenko, B.N. Savenko, D. Novoselov, D. Prabhakaran, I.O. Troyanchuk // Физика низких температур. — 2018. — Т. 44, № 4. — С. 432-438. — Бібліогр.: 46 назв. — англ. 0132-6414 PACS: 71.20.Eh, 75.30.Mb, 75.80.+q http://dspace.nbuv.gov.ua/handle/123456789/175990 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Низкотемпеpатуpный магнетизм Низкотемпеpатуpный магнетизм |
| spellingShingle |
Низкотемпеpатуpный магнетизм Низкотемпеpатуpный магнетизм Panfilov, A.S. Grechnev, G.E. Zhuravleva, I.P. Lyogenkaya, A.A. Pashchenko, V.A. Savenko, B.N. Novoselov, D. Prabhakaran, D. Troyanchuk, I.O. Pressure effect on magnetic susceptibility of LaCoO₃ Физика низких температур |
| description |
The effect of pressure on magnetic properties of LaCoO₃ is studied experimentally and theoretically. The pressure dependence of magnetic susceptibility χ of LaCoO₃ is obtained by precise measurements of χ as a function of the hydrostatic pressure P up to 2 kbar in the temperature range from 78 K to 300 K. A pronounced magnitude of the pressure effect is found to be negative in sign and strongly temperature dependent. The obtained experimental data are analysed by using a two-level model and DFT+U calculations of the electronic structure of LaCoO₃ . In particular, the fixed spin moment method was employed to obtain a volume dependence of the total energy difference Δ between the low spin and the intermediate spin states of LaCoO₃ . Analysis of the obtained experimental χ(P) dependence within the two-level model, as well as our DFT+U calculations, have revealed the anomalous large decrease in the energy difference Δ with increasing of the unit cell volume. This effect, taking into account a thermal expansion, can be responsible for the temperatures dependence of Δ, predicting its vanishing near room temperature. |
| format |
Article |
| author |
Panfilov, A.S. Grechnev, G.E. Zhuravleva, I.P. Lyogenkaya, A.A. Pashchenko, V.A. Savenko, B.N. Novoselov, D. Prabhakaran, D. Troyanchuk, I.O. |
| author_facet |
Panfilov, A.S. Grechnev, G.E. Zhuravleva, I.P. Lyogenkaya, A.A. Pashchenko, V.A. Savenko, B.N. Novoselov, D. Prabhakaran, D. Troyanchuk, I.O. |
| author_sort |
Panfilov, A.S. |
| title |
Pressure effect on magnetic susceptibility of LaCoO₃ |
| title_short |
Pressure effect on magnetic susceptibility of LaCoO₃ |
| title_full |
Pressure effect on magnetic susceptibility of LaCoO₃ |
| title_fullStr |
Pressure effect on magnetic susceptibility of LaCoO₃ |
| title_full_unstemmed |
Pressure effect on magnetic susceptibility of LaCoO₃ |
| title_sort |
pressure effect on magnetic susceptibility of lacoo₃ |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2018 |
| topic_facet |
Низкотемпеpатуpный магнетизм |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/175990 |
| citation_txt |
Pressure effect on magnetic susceptibility of LaCoO₃ / A.S. Panfilov, G.E. Grechnev, I.P. Zhuravleva, A.A. Lyogenkaya, V.A. Pashchenko, B.N. Savenko, D. Novoselov, D. Prabhakaran, I.O. Troyanchuk // Физика низких температур. — 2018. — Т. 44, № 4. — С. 432-438. — Бібліогр.: 46 назв. — англ. |
| series |
Физика низких температур |
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