A specific-heat study of RMn4Al8 compounds (R=Y, La, Pr, Nd, Dy, Er)

被引：37

作者：

Hagmusa, IH ^{[1
]}

Klaasse, JCP ^{[1
]}

Brück, E ^{[1
]}

de Boer, FR ^{[1
]}

Buschow, KHJ ^{[1
]}

机构：

[1] Univ Amsterdam, Van Woals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 297卷 / 1-2期

关键词：

RMn4Al8; compounds; ThMn12; structure; specific heat measurements;

D O I：

10.1016/S0925-8388(99)00595-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Specific-heat measurements have been performed on the tetragonal ThMn12-type RMn4Al8 compounds with R = Y, La, Pr, Nd, Dy and Er in the temperature range 1.5 to 200 K. The compound PrMn4Al8 gives rise to a lambda-type anomaly at 14 K. No anomalies indicative of magnetic ordering were found above 1.5 K in the specific-heat curves of the RMn4Al8 compounds with R = Y, La, Nd, Dy, and Er. From the temperature dependence of the magnetic entropy, it is concluded that the overall crystal-field splitting in the compounds with R = Pr, Nd, Dy, and Er is of the order of 200 K or even less. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：21 / 25

页数：5

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