Magnetocaloric and magneto-transport properties of Gd10Co20Si70 alloy |
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| Authors: | T.P. Rashid K. Arun Ivan Curlik Sergej Ilkovic Marian Reiffers Andrea Dzubinska R. Nagalakshmi |
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| Affiliation: | 1. Intermetallics and Non-Linear Optics Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli 620 0015, India;2. Faculty of Humanities and Natural Sciences, Presov University, Presov, Slovakia;3. Faculty of Natural Sciences, P.J. ?afárik University, 040 01 Ko?ice, Slovakia |
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| Abstract: | We report the results of magnetic, thermodynamic, transport and magnetocaloric effect (MCE) studies of newly synthesized Gd10Co20Si70 alloy. These measurements confirm an antiferromagnetic transition at TN = 9 K. Both MCE and magnetoresistance (MR) show quadratic dependence on the applied magnetic field, indicating the presence of spin fluctuations in the alloy. The maximum values of the magnetic entropy change determined from the isothermal magnetization data for magnetic field change of 7 and 9 T are found to be 10.5 and 15.6 J/kg·K, respectively. As a consequence of the spin fluctuations effect, the MCE peaks are pulled towards high temperature side as asymmetrically broadened peak. The MR attains a large positive value of 73% at 2 K in 8 T. The large MR and reversible MCE make this alloy an attractive multifunctional magnetic material. |
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| Keywords: | Rare earth-transition metal alloy Magnetic properties Magnetocaloric effect Magnetoresistance Spin fluctuations |
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