Magnetic, magnetocaloric and magnetotransport properties of RSn 1+xGe1+xcompounds (R=Gd, Tb, and Er; X=O.1)

Sachin Gupta, K. G. Suresh, A. K. Nigam

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    11 Citations (Scopus)

    Abstract

    We have studied the magnetic, magnetocaloric and magnetotransport properties of RSn1+xGe1+x(R=Gd, Tb, and 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 O in case of GdSn 1.1Ge0.9 and TbSn1.1Ge0.9 indicate that strong antiferromagnetic interactions are involved, which is also reflected in the magnetization isotherms. On the other hand ErSn1.1Ge 0.9 shows weak antiferromagnetic interaction. The heat capacity data have been analyzed by fitting the temperature dependence and the values of 0D and y have been estimated. Among these three compounds, ErSn 1.1Ge0.9 shows considerable magnetic entropy change of 9.5 Jkg 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.

    Original languageEnglish
    Pages (from-to)61-68
    Number of pages8
    JournalJournal of Magnetism and Magnetic Materials
    Volume342
    DOIs
    Publication statusPublished - 2013 Jan 1

    Keywords

    • Antiferromagnet Magnetotransport Magnetic entropy change

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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