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Magnetic, magnetocaloric and magnetotransport properties of RSn1+xGe1-x compounds (R = Gd, Tb, and Er; x=0.1)

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Title Magnetic, magnetocaloric and magnetotransport properties of RSn1+xGe1-x compounds (R = Gd, Tb, and Er; x=0.1)
 
Creator GUPTA, S
SURESH, KG
NIGAM, AK
 
Subject Antiferromagnet
Magnetotransport
Magnetic entropy change
LOW-TEMPERATURE RESISTIVITY
TRANSPORT-PROPERTIES
HEAT-CAPACITY
GERMANIDES
METALS
R=TB
DY
 
Description We have studied the magnetic, magnetocaloric and magnetotransport properties of RSn1+xGe1-x(R = Gd, Tb, Er; x = 0.1) series by means of magnetization, heat capacity and resistivity measurements. It has been found that all the compounds crystallize in the orthorhombic crystal structure described by the centrosymmetric space group Cmcm (No. 63). The magnetic susceptibility and heat capacity data suggest that all the compounds are antiferromagnetic. Large negative values of theta(p) in case of GdSn1.1Ge0.9 and TbSn1.1Ge0.9 indicate that strong antiferromagnetic interactions are involved, which is also reflected in the magnetization isotherms. On the other hand ErSn1.1Ge0.9 shows weak antiferromagnetic interaction. The heat capacity data have been analyzed by fitting the temperature dependence and the values of theta(D) and gamma have been estimated. Among these three compounds, ErSn1.1Ge0.9 shows considerable magnetic entropy change of 9.5 J/kg K and an adiabatic temperature change of 3.2 K for a field of 50 kOe. The resistivity data in different temperature regimes have been analyzed and the dominant contributions have been identified. All the compounds show small but positive magnetoresistance. (c) 2013 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-10-16T13:10:22Z
2014-10-16T13:10:22Z
2013
 
Type Article
 
Identifier JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 34261-68
http://dx.doi.org/10.1016/j.jmmm.2013.04.004
http://dspace.library.iitb.ac.in/jspui/handle/100/15630
 
Language en