Magnetic and transport properties of Pr2Pt3Si5

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:324

Article

Anand, V. K.^1,2  Anupam³  Hossain, Z.³  Ramakrishnan, S.¹  Thamizhavel, A.¹  Adroja, D. T.² 

[1] Tata Inst Fundamental Res, Dept Condensed Matter Phys & Mat Sci, Bombay 400005, Maharashtra, India

[2] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[3] Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India

关键词: Intermettalics;    Magnetization;    Ac susceptibility;    Specific heat;    Crystal field effect;    Thermo-remnant magnetization;   

DOI  :  10.1016/j.jmmm.2012.03.016

来源: Elsevier

【 摘 要 】

We have investigated the magnetic and transport properties of a polycrystalline Pr2Pt3Si5 sample through the dc and ac magnetic susceptibilities, electrical resistivity, and specific heat measurements. The Rietveld refinement of the powder X-ray diffraction data reveals that Pr2Pt3Si5 crystallizes in the U2CO3Si5-type orthorhombic structure (space group Ibam). Both the dc and ac magnetic susceptibility data measured at low fields exhibit sharp anomaly near 15 K. In contrast, the specific heat data exhibit only a broad anomaly implying no long range magnetic order down to 2 K. The broad Schottky-type anomaly in low temperature specific heat data is interpreted in terms of crystal electric field (CEF) effect, and a CEF-split singlet ground state is inferred. The absence of the long range order is attributed to the presence of nonmagnetic singlet ground state of the Pr3+ ion. The electrical resistivity data exhibit metallic behavior and are well described by the Bloch-Gruniesen-Mott relation. (C) 2012 Elsevier B.V. All rights reserved.

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