Structure and physical properties of RE2AgGe3 (RE = Ce, Pr, Nd) compounds

被引：12

作者：

Sarkar, Sumanta ^{[1
]}

Mumbaraddi, Dundappa ^{[1
]}

Halappa, Pramod ^{[1
]}

Kalsi, Deepti ^{[1
]}

Rayaprol, Sudhindra ^{[2
]}

Peter, Sebastian C. ^{[1
]}

机构：

[1] Jawaharlal Nehru Ctr Adv Sci Res, New Chem Unit, Bangalore 560064, Karnataka, India

[2] Mumbai Ctr, UGC DAE Consortium Sci Res, Bombay 400085, Maharashtra, India

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2015年 / 229卷

关键词：

Intermetallics; Crystallography; Magnetism; Resistivity; CRYSTAL-STRUCTURE; MAGNETIC-PROPERTIES; BEHAVIOR; TRANSITIONS; SI; MAGNETORESISTANCE; GERMANIDE; TRANSPORT; VALENCE; SYSTEM;

D O I：

10.1016/j.jssc.2015.06.003

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We have synthesized the compounds RE2AgGe3 (RE = Ce, Pr, Nd) by arc melting. The crystal structure obtained from single crystal and powder X-ray diffraction suggests that these compounds crystallize in the alpha-ThSi2 structure type. The magnetic susceptibility data of Ce2AgGe3 follows Curie-Weiss (CW) law above 25 K without any magnetic ordering down to 2 K. The effective magnetic moment (mu(eff)) was calculated as 2.53 mu(B)/Ce and negative Curie paramagnetic temperature (theta(p)) = -2.4 K hint weak antiferromagnetic coupling among the adjacent spins. Pr2AgGe3 shows a complex magnetic behavior wherein the magnetic susceptibility at field cooled and zero field cooled modes bifurcates at 11.5 K with the latter undergoing a cusp like maxima, probably due to weak ferromagnetic interaction. The theta(p) and mu(eff) obtained are 4 K and 4.33 mu(B)/Pr, respectively. Nd2AgGe3 undergoes multiple magnetic transitions. Temperature dependent resistivity data reveals that three compounds are metallic in nature. (C) 2015 Elsevier Inc. All rights reserved.

引用

页码：287 / 295

页数：9

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