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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1142Magnetic Properties and Magnetocaloric Effect of...

Magnetic Properties and Magnetocaloric Effect of Nd_0.7Gd_0.3Mn₂Si₂ Alloy

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Abstract:

In this work, crystal structure, magnetic properties and magnetocaloric effect of Nd_0.7Gd_0.3Mn₂Si₂ alloy were studied by X-ray diffraction (XRD), Physical Property Measurement System (PPMS) and Differential Scanning Calorimetry (DSC). Nd_0.7Gd_0.3Mn₂Si₂ crystallizes in ThCr₂Si₂-typed structure with space group I4/mmm, in which the Nd, Gd, Mn and Si atoms occupy 2a (0, 0, 0), 2a (0, 0, 0), 4d (0, 1/2, 1/4) and 4e (0, 0, 0.38261) position, respectively. The Curie temperature (Tc) of Nd_0.7Gd_0.3Mn₂Si₂ alloy is 42 K, while the spin reorientation temperature (T_SR) is 26 K and the Nel temperature (T_N) is 410 K. The Tc and T_N were determined using PPMS and DSC, respectively. The maximum value of the magnetic entropy change (-S_m_ax) in the field change of 0-5 T is 11.862 J/kg K, while the value of relative cooling power (RCP) in Nd_0.7Gd_0.3Mn₂Si₂alloy is 69.666 J/kg under the field change of 5 T.

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2016 International Conference on Advanced Material Research and Application

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Periodical:

Advanced Materials Research (Volume 1142)

Pages:

47-52

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1142.47

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Online since:

January 2017

Authors:

Shi Dong Lin, Xiao Long Chen, Jiang Wang, Chao Fan Zhu, Mao Hua Rong, Guang Hui Rao, Huai Ying Zhou

Keywords:

Magnetic Entropy Change, Magnetocaloric Effect, Nd_0.7Gd_0.3Mn₂Si₂

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