Structural, Magnetic and Electrical Transport Properties of Ternary Compound LaCo2Ge2

被引：1

作者：

Liu, Han-Yuan ^{[1
]}

Fu, Li ^{[1
]}

Guo, Yong-Quan ^{[1
]}

机构：

[1] North China Elect Power Univ, Sch Energy Power & Mech Engn, Beijing 102206, Peoples R China

来源：

MECHANICAL MATERIALS AND MANUFACTURING ENGINEERING III | 2014年 / 455卷

关键词：

LaCo2Ge2; Rietveld refinement; Structure; Pauli paramagnetic; Semimetallic; STATE; SM; LA; ND; LU;

D O I：

10.4028/www.scientific.net/AMM.455.148

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ternary compound LaCo2Ge2 was synthesized and characterized by means of XRD, magnetic and electrical measurements. Rietveld structure refinements of powder XRD patterns confirm that LaCo2Ge2 compound crystallizes with a body-centered tetragonal structure of ThCr2Si2-type (space group I4/mmm) with the unit lattice parameters a=4.105(6) angstrom and c=10.264(7) angstrom. Nd, Co and Ge occupy 2a, 4d and 4e crystal positions, respectively. Magnetism measurements show that LaCo2Ge2 is nearly temperature-impendent Pauli paramagnetic down to 100 K, whereas orders diamagnetic at elevated temperatures. The rho (T) measurement showed that rho(0) is 0.34625 Omega.mu m and a positive temperature coefficient for LaCo2Ge2 is equal to 0.82178, indicating that LaCo2Ge2 exhibits typical semimetallic.

引用

页码：148 / 153

页数：6

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