Oxygen miscibility gap and spin glass formation in the pyrochlore Lu2Mo2O7

被引：11

作者：

Clark, L. ^{[1
,2
]}

Ritter, C. ^{[3
]}

Harrison, A. ^{[1
,2
,3
]}

Attfield, J. P. ^{[1
,2
]}

机构：

[1] Univ Edinburgh, Ctr Sci Extreme Condit, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JZ, Midlothian, Scotland

[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2013年 / 203卷

基金：

英国工程与自然科学研究理事会;

关键词：

Pyrochlore oxides; Frustrated magnets; Phase separation; Y2MO2O7; DISORDER; BEHAVIOR; PHASE; OXIDE;

D O I：

10.1016/j.jssc.2013.04.012

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Rare earth (R) molybdate pyrochlores, R2Mo2O7, are of interest as frustrated magnets. Polycrystalline samples of Lu2Mo2O7-x, prepared at 1600 degrees C display a coexistence of cubic pyrochlore phases. Rietveld fits to powder neutron diffraction data and chemical analyses show that the miscibility gap is between a stoichiometric x=0 and an oxygen-deficient x similar or equal to 0.4 phase. Lu2Mo2O7 behaves as a spin glass material, with a divergence of field cooled and zero field cooled DC magnetic susceptibilities at a spin freezing temperature T-f=16 K, that varies with frequency in AC measurements following a Vogel-Fulcher law. Lu2Mo2O6.6 is more highly frustrated spin glass and has T-f=20 K. (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：199 / 203

页数：5

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