Heat capacity of the frustrated magnetic pyrochlores Gd2Zr2O7 and Gd2Hf2O7

被引：38

作者：

Durand, Alice M. ^{[1
]}

Klavins, Peter ^{[1
]}

Corruccini, L. R. ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2008年 / 20卷 / 23期

关键词：

D O I：

10.1088/0953-8984/20/23/235208

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The heat capacities of Gd(2)Zr(2)O(7) and Gd(2)Hf(2)O(7) both show sharp peaks in the vicinity of 0.77 K, consistent with the existence of long range magnetic order. They are superimposed in both cases on broader maxima centered at approximately 1 K, presumably due to short range spin correlations. Both compounds exhibit antiferromagnetic interactions, with Weiss constants of approximately - 7 K. Comparisons are made to earlier results for the isomorphic compounds Gd(2)Ti(2)O(7) and Gd(2)Sn(2)O(7).

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