Magnetic structures of RCuGe (R equals rare earth) compounds

被引：4

作者：

Baran, S

Szytula, A

Leciejewicz, J

Stusser, N

Zygmunt, A

Tomkowicz, Z

Guillot, M

机构：

[1] INST NUCL CHEM & TECHNOL,PL-03195 WARSAW,POLAND

[2] HAHN MEITNER INST BERLIN GMBH,D-1000 BERLIN,GERMANY

[3] POLISH ACAD SCI,W TRZEBIATOWSKI INST LOW TEMP & STRUCT RES,PL-50950 WROCLAW,POLAND

[4] CNRS,SERV NATL CHAMPS INTENSES,F-38042 GRENOBLE,FRANCE

来源：

PHYSICA B | 1997年 / 234卷

关键词：

magnetic order; rare-earth metals; Rietveld refinement;

D O I：

10.1016/S0921-4526(96)01076-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The crystal and magnetic structures of RCuGe (R = Pr, Nd, Tb, Dy, Ho and Er) compounds were determined by neutron diffraction on polycrystalline samples. Their magnetic data along with those for GdCuGe are reported. The compounds with R = Pr and Nd have the hexagonal AIB(2)-type crystal structure, while other compounds represent hexagonsal LiGeGa-type. All compounds are antiferromagnetic at low temperatures. The Neel temperatures changes from 1.8 K for R = 17 K for R = Gd. The magnetic structure of these compounds is sine modulated with the wave vector k = [1/3, 0, 0] (except NdCuGe in case of which k = [1/2, 0, 0]). For heavy lanthanided compounds, the change of direction of the magnetic moments from the one perpendicular to the c-axis (R = Tb and Dy) to the one parallel (R = Ho and Er) has been found. For ErCuGe, the change of magnetic structure is observed at low temperatures.

引用

页码：656 / 658

页数：3

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