Crystal structure and magnetic behaviour of the ternary uranium and thorium-molybdenum chalcogenides UMo6S8, UMo6Se8 and ThMo6S8

被引：14

作者：

Daoudi, A ^{[1
]}

Potel, M ^{[1
]}

Noel, H ^{[1
]}

机构：

[1] UNIV HASSAN II,FAC SCI AIN CHOCK,CHIM SOLIDE LAB,CASABLANCA,MOROCCO

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1996年 / 232卷 / 1-2期

关键词：

crystal structure; magnetic behaviour; uranium-molybdenum chalcogenides; thorium-molybdenum chalcogenides;

D O I：

10.1016/0925-8388(95)02000-4

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：

Single crystals of UMo6S8, UMo6Se8 and ThMo6S8 were obtained using the slow cooling method. Refinements of their crystal structure (R = 0.030, 0.032 and 0.029 respectively) revealed a non-integral occupancy of the actinide sites in the U-selenide and the Th- sulfide, giving the formula U0.82Mo6Se8 and Th0.81Mo6S8. Magnetic measurements showed weak ferromagnetism behaviour below 25 K for U0.82Mo6Se8, and a transition from weak paramagnetism to diamagnetism at 3 K for Th0.81Mo6S8, suggesting the onset of superconductivity. UMo6S8 follows a Curie-Weiss type behaviour down to 2 K.

引用

页码：180 / 185

页数：6

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