Specific heat of NaV6O11 single crystals

被引：11

作者：

Akiba, A

Yamada, H

Matsuo, R

Kanke, Y

Haeiwa, T

Kita, E

机构：

[1] Univ Tsukuba, Inst Appl Phys, Tsukuba, Ibaraki 3058573, Japan

[2] Natl Inst Res Inorgan Mat, Tsukuba, Ibaraki 3050044, Japan

[3] Shinshu Univ, Fac Engn, Nagano 3808553, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1998年 / 67卷 / 04期

关键词：

vanadium; sodium; oxide; structural phase transition; specific heat; AC calorimetry;

D O I：

10.1143/JPSJ.67.1303

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The specific heat of NaV6O11 single crystal was investigated with an AC calorimeter. Lambda type anomalies at 64.3, 80.1 and 242.7 K were observed. It is found that the transition temperature of the P6(3)/mmc - P6(3)mc structural transition is 242.7 K, which has been reported to occur at a temperature between 200 K and room temperature. The anomalies at 64.3 and 242.7 K coincide well with the two magnetic transitions previously reported. Present specific heat study coupled with single crystal X-ray diffraction data reveals that the P6(3)mc - Cmc2(1) structural transition occurs at 80.1 K and accompanies the kink in the resistivity. Previous study reported that the P6(3)mc - Cmc2(1) structural transition occurs at 35-40 K, however no anomaly in the specific heat was observed at 35-40 K in this study.

引用

页码：1303 / 1305

页数：3

共 12 条

[1] SYNTHESIS AND CRYSTAL-STRUCTURE OF NAV6O11 [J].