Antiferromagnetism in YbMn2Ge2-Mn magnetic sublattice

被引：22
作者：
Hofmann, M
Campbell, SJ
Szytula, A
机构：
[1] Hahn Meitner Inst Kernforsch Berlin GmbH, BENSC, D-14109 Berlin, Germany
[2] Univ New S Wales, Sch Phys, Univ Coll, Australian Def Force Acad, Canberra, ACT 2600, Australia
[3] Jagiellonian Univ, Inst Phys, Krakow, Poland
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 311卷 / 02期
关键词：
ytterbium manganese germanide; neutron diffraction; magnetic structure;
D O I：
10.1016/S0925-8388(00)01111-7
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：
The magnetic structures of YbMn2Ge2 with the tetragonal ThCr2Si2 type structure have been investigated by neutron diffraction measurements over the temperature range similar to 10-526 K, Rietveld refinements demonstrate that YbMn2Ge2 has a planar antiferromagnetic structure below T(NI)similar to 510 K with a canted antiferromagnetic structure below T(N2)similar to 185 K. The canted antiferromagnetic ground state of YbMn2Ge2 has a Mn moment value of mu(Mn)(10 K)=3.03(5) mu(B), With the z-component of the moment mu(z)(10 K)=1.72(5) mu(B), corresponding to a canting angle relative to the c-axis of theta(10 K)=55.4(9)degrees No evidence for magnetic ordering of the Yb lattice is obtained although an unusual variation of the a-lattice parameter with temperature is observed. (C) 2000 Elsevier Science S.A, All rights reserved.
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页码：137 / 142
页数：6
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