Heat capacity studies of magnetic phase transition in sodium-rich NaxCoO₂ (0.73 ≤ x ≤ 0.87)

• Published in: Физика низких температур
• Date: 2009
• Main Authors: Baran, A., Botko, M., Zorkovská, A., Kajňaková, M., Šebek, J., Šantavá, E., Peng, J.P., Lin, C.T., Feher, A.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2009
• Subjects: Низкотемпеpатуpный магнетизм
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/117413
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: 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.

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 a...