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Effect of complex magnetic structure on the magnetocaloric and magneto-transport properties in GdCuSi

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Abstract

GdCuSi has been studied by structural, magnetic, magneto-thermal, and magneto-transport measurements. The compound crystallizes in the Ni2In-type hexagonal structure. Magnetic measurements show antiferromagnetic ordering at T N = 14.2 K and a magnetic anomaly near 5 K, which are confirmed by different measurements. Magnetocaloric effect (MCE) has been estimated from both magnetization and heat capacity data and it shows a change in sign below T N. Similar to MCE, magnetoresistance (MR) data also show sign change below T N. The compound shows large MCE and MR near its ordering temperature. The sign change in MCE and MR is attributed to the non-collinear antiferromagnetic structure of the compound. The theoretical calculations suggest competition of ferromagnetic and antiferromagnetic interactions, which causes non-collinear magnetic structure in this compound.

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Acknowledgements

SG thanks IIT Bombay for providing Research Associateship. The authors thank to UGC-DAE CSR, Indore and Dr. R. Rawat for providing the facility of transport measurements. Theoretical calculations of the electronic structure were supported by the grant of the Russian Science Foundation (project No. 14-22-00004).

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Authors and Affiliations

  1. Department of Physics, Indian Institute of Technology Bombay, Mumbai, 400076, India

    Sachin Gupta & K. G. Suresh

  2. Institute of Metal Physics, Russian Academy of Sciences, Ural Branch, Yekaterinburg, 620137, Russia

    A. V. Lukoyanov

  3. Ural Federal University, Yekaterinburg, 620002, Russia

    A. V. Lukoyanov

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  1. Sachin Gupta
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  2. K. G. Suresh
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  3. A. V. Lukoyanov
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Correspondence to Sachin Gupta.

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Gupta, S., Suresh, K.G. & Lukoyanov, A.V. Effect of complex magnetic structure on the magnetocaloric and magneto-transport properties in GdCuSi. J Mater Sci 50, 5723–5728 (2015). https://doi.org/10.1007/s10853-015-9116-8

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  • DOI: https://doi.org/10.1007/s10853-015-9116-8

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