MAGNETIC SPECIFIC-HEAT OF (CD1-X-YZNYMNX)3AS2

被引:2
作者
BEDNARSKI, H
CISOWSKI, J
SCHMITT, D
VOIRON, J
PORTAL, JC
LUBCZYNSKI, W
机构
[1] INSA,DEPT GENIE PHYS,TOULOUSE,FRANCE
[2] CNRS,LAB MAGNETISME LOUIS NEEL,F-38042 GRENOBLE,FRANCE
[3] CNRS,SERV NATL CHAMPS INTENSES,F-38042 GRENOBLE,FRANCE
关键词
D O I
10.12693/APhysPolA.84.705
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The specific heat of (Cd1-x-yZnyMnx)3As2 with low Mn concentration (x less-than-or-equal-to 0.067) and for two Zn contents (y = 0.14 and y = 0.34) has been measured in the temperature range of 1.5-30 K. The magnetic contribution to the total specific heat has been analysed within our generalized pair approximation model which takes into account the complicated tetragonal crystal structure of Cd1-x-yZnyMnx)3As2. Assuming that the total Mn-Mn interaction strength is a sum of superexchange and the Bloembergen-Rowland exchange, we have obtained a very good agreement between our approach and experiment by using the analytical formulae with only two adjustable parameters, i.e. the first nearest-neighbour exchange constants for both mechanisms which appear to be strongly dependent on Zn content.
引用
收藏
页码:705 / 708
页数:4
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