Magnetic Transition and Magnetocaloric Effect of Gd{sub 1−x}Nd{sub x}Mn{sub 2}Ge{sub 2} (x = 0.3 and 0.4) Compounds
- Guilin University of Electronic Technology, School of Materials Science and Engineering and Guangxi Key Laboratory of Information Materials (China)
Gd{sub 1−x}Nd{sub x}Mn{sub 2}Ge{sub 2} compounds with x = 0.3 and 0.4 were prepared by arc melting and crystallized in the ThCr{sub 2}Si{sub 2}-type structure with the space group I4/mmm based on X-ray powder diffraction (XRD) results. Magnetic transition and magnetocaloric effect (MCE) of the Gd{sub 1−x}Nd{sub x}Mn{sub 2}Ge{sub 2} compounds were investigated by magnetic measurements on a physical property measurement system (PPMS). Gd{sub 0.7}Nd{sub 0.3}Mn{sub 2}Ge{sub 2} compound exhibits complicated magnetic transitions at around 63 K (T{sub comp}), 86 K (T{sub 1}), 136 K (T{sub C}), 260 K (T{sub N}{sup inter}), and 347 K (T{sub C}{sup inter}), respectively, while Gd{sub 0.6}Nd{sub 0.4}Mn{sub 2}Ge{sub 2} compound shows a spin re-orientation transition at about 52 K. Combined with isothermal magnetization curves and the Maxwell relation, the maximum magnetic entropy changes of Gd{sub 0.7}Nd{sub 0.3}Mn{sub 2}Ge{sub 2} and Gd{sub 0.6}Nd{sub 0.4}Mn{sub 2}Ge{sub 2} were calculated to be 4.31 and 5.15 J kg{sup − 1} K{sup − 1} under the applied magnetic field changing from 0 to 5 T, respectively.
- OSTI ID:
- 22782466
- Journal Information:
- Journal of Superconductivity and Novel Magnetism, Vol. 31, Issue 11; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
- Country of Publication:
- United States
- Language:
- English
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