Magnetic Transition and Magnetocaloric Effect of Gd1−xNdxMn2Ge2 (x = 0.3 and 0.4) Compounds
| Autor: | B. Wen, Jiang Wang, M.H. Rong, H.Y. Zhou, Guang Hui Rao, D. L. Guo, S.D. Lin |
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| Rok vydání: | 2018 |
| Předmět: |
Diffraction
Materials science Space group 02 engineering and technology Crystal structure 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Magnetic field Magnetization Crystallography 0103 physical sciences X-ray crystallography Magnetic refrigeration 010306 general physics 0210 nano-technology Powder diffraction |
| Zdroj: | Journal of Superconductivity and Novel Magnetism. 31:3711-3716 |
| ISSN: | 1557-1947 1557-1939 |
| Popis: | Gd1−xNdxMn2Ge2 compounds with x = 0.3 and 0.4 were prepared by arc melting and crystallized in the ThCr2Si2-type structure with the space group I4/mmm based on X-ray powder diffraction (XRD) results. Magnetic transition and magnetocaloric effect (MCE) of the Gd1−xNdxMn2Ge2 compounds were investigated by magnetic measurements on a physical property measurement system (PPMS). Gd0.7Nd0.3Mn2Ge2 compound exhibits complicated magnetic transitions at around 63 K (Tcomp), 86 K (T1), 136 K (TC), 260 K ( $T_{\mathrm {N}}^{\text {inter}}$ ), and 347 K ( $T_{\mathrm {C}}^{\text {inter}}$ ), respectively, while Gd0.6Nd0.4Mn2Ge2 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 Gd0.7Nd0.3Mn2Ge2 and Gd0.6Nd0.4Mn2Ge2 were calculated to be 4.31 and 5.15 J kg− 1 K− 1 under the applied magnetic field changing from 0 to 5 T, respectively. |
| Databáze: | OpenAIRE |
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