Heat capacity studies of magnetic phase transition in sodium-rich NaxCoO₂ (0.73 ≤ x ≤ 0.87)
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Heat capacity studies of magnetic phase transition in sodium-rich NaxCoO₂ (0.73 ≤ x ≤ 0.87)
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| Creator |
Baran, A.
Botko, M. Zorkovská, A. Kajňaková, M. Šebek, J. Šantavá, E. Peng, J.P. Lin, C.T. Feher, A. |
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| Subject |
Низкотемпеpатуpный магнетизм
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| Description |
Specific heat measurements in the temperature region from 2 to 50 K in magnetic field up to 10 T, oriented parallel and perpendicularly to the CoO₂ layers were carried out on a series of high-quality single- crystals of NaxCoO₂ (x = 0.73, 0.76, 0.77, 0.78 and 0.87). Surprisingly, sharp lambda type anomaly was observed only for the concentration x = 0.76 at temperature (21.80 ± 0.02) K, for all the remaining doping levels round anomaly in experimental data was visible at temperature ~ 20 K, indicating a smeared magnetic phase transition. While the magnetic field oriented perpendicularly to the CoO₂ layers shifts the temperature of this anomaly to lower values, parallel magnetic field has no influence on it, what indirectly supports the idea of A-type antiferromagnetic ordering in studied systems.
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| Date |
2017-05-23T14:08:08Z
2017-05-23T14:08:08Z 2009 |
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| Type |
Article
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| Identifier |
Heat capacity studies of magnetic phase transition in sodium-rich NaxCoO₂ (0.73 ≤ x ≤ 0.87) / A. Baran, M. Botko, A. Zorkovská, M. Kajňaková, J.Šebek, E. Šantavá, J.P. Peng, C.T. Lin, A. Feher // Физика низких температур. — 2009. — Т. 35, № 10. — С. 1030-1033. — Бібліогр.: 29 назв. — англ.
0132-6414 PACS: 75.30.Kz, 71.27.+a, 75.40.Cx http://dspace.nbuv.gov.ua/handle/123456789/117413 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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