Crystal structures and magnetic properties of M2V2O7 (M = Co, Ni and Cu) compounds

被引:43
|
作者
Touaiher, M
Rissouli, K
Benkhouja, K
Taibi, M
Aride, J
Boukhari, A
Heulin, B
机构
[1] ENS, LPCM, AUF, LAF 502, Rabat, Morocco
[2] Univ Chouaib Doukkali, Fac Sci, LMCM, El Jadida 24000, Morocco
[3] Univ Mohammed, Fac Sci, LCSA, AUF,LAF 501, Rabat, Morocco
[4] EHICS, F-67008 Strasbourg, France
关键词
divanadates; magnetic properties; specific heat;
D O I
10.1016/j.matchemphys.2003.11.032
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The magnetic properties Of M2V2O7 (M = Co, Ni and Cu) have been investigated between 4 and 300K. The results emphasize the relationships between the structural and physical properties of the titled compounds. M2V2O7 (M = Co, Ni) exhibit a dichromate structure. The Ni-compound is antiferromagnetic c, but the Co-one is ferromagnetic. Their specific heats confirm the low dimensionality at high temperature, and the magnetic transition is probably due to 3d-1d transition. The two varieties Of Cu2V2O7 Compounds are type thortveitite. alpha-Cu2V2O7 is an orthorthombic and beta-Cu2V2O7 is a monoclinic. The beta-Cu2V2O7 is an anti ferromagned c compound while beta-Cu2V2O7 is appraised as a ferromagnetic or canted antiferromagnetic one. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:41 / 46
页数:6
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