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Pressure effect on magnetic susceptibility of LaCoO₃

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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Main Authors: 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.
Format: Article
Language:English
Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2018
Series:Физика низких температур
Subjects:
Низкотемпеpатуpный магнетизм
Online Access:http://dspace.nbuv.gov.ua/handle/123456789/175990
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spelling 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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first_indexed 2023-10-18T22:40:12Z
last_indexed 2023-10-18T22:40:12Z
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