Neutron diffraction studies of the magnetoelastic compounds Tb5SixGe4-x (x=2.2 and 2.5) -: art. no. 104431

被引：19

作者：

Garlea, VO ^{[1
]}

Zarestky, JL

Jones, CY

Lin, LL

Schlagel, DL

Lograsso, TA

Tsokol, AO

Pecharsky, VK

Gschneidner, KA

Stassis, C

机构：

[1] Iowa State Univ Sci & Technol, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA

[2] Iowa State Univ Sci & Technol, Dept Phys, Ames, IA 50011 USA

[3] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA

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

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.72.104431

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the results of a neutron diffraction study, carried out on both single crystalline and polycrystalline samples of Tb5Si2.2Ge1.8 and polycrystalline Tb5Si2.5Ge1.5. On cooling, at approximately 120 K, the Tb5Si2.2Ge1.8 system undergoes a magnetoelastic transition from a high-temperature monoclinic-paramagnetic to a low-temperature orthorhombic-ferromagnetic structure. Between 120 K and 75 K, the magnetic structure has a net ferromagnetic component along the a axis direction. The moments are slightly canted with respect to the a axis, while the components along the b and c axes are ordered antiferromagnetically. A second magnetic transition occurs at approximately 75 K. Below this temperature, the magnetic structure consists of ferromagnetically aligned mu(x) and mu(z) projections of the magnetic moments and an antiferromagnetic arrangement of the mu(y) moment components. Magnetic structures of Tb5Si2.5Ge1.5 are nearly identical to those of Tb5Si2.2Ge1.8.

引用

页数：9

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