Single-crystal neutron diffraction study of short-range magnetic correlations in Tb5Ge4

被引：13

作者：

Tian, W. ^{[1
,2
]}

Kreyssig, A. ^{[1
,2
]}

Zarestky, J. L. ^{[1
,2
]}

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

Nandi, S. ^{[1
,2
]}

Goldman, A. I. ^{[1
,2
]}

Lograsso, T. A. ^{[2
]}

Schlagel, D. L. ^{[2
]}

Gschneidner, K. A. ^{[2
,3
]}

Pecharsky, V. K. ^{[2
,3
]}

McQueeney, R. J. ^{[1
,2
]}

机构：

[1] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[2] Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA

[3] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 13期

基金：

美国能源部;

关键词：

REFRIGERATION; BEHAVIOR; ALLOYS;

D O I：

10.1103/PhysRevB.80.134422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a single-crystal neutron diffraction study of the magnetic short-range correlations in Tb5Ge4 which orders antiferromagnetically below the Neel temperature T-N approximate to 92 K. Strong diffuse scattering arising from magnetic short-range correlations was observed in wide temperature ranges both below and above T-N. The antiferromagnetic ordering in Tb5Ge4 is described to consist of strongly coupled ferromagnetic block layers in the ac plane that stack along the b axis with weak antiferromagnetic interlayer coupling. Diffuse scattering was observed along both a* and b* directions indicating three-dimensional short-range correlations. Moreover, the q dependence of the diffuse scattering is Squared Lorentzian in form suggesting a strongly clustered magnetic state that may be related to the proposed Griffiths-like phase in Gd5Ge4.

引用

页数：5

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