Magnetism and magnetocaloric properties of Mn0.95Cr0.05As |
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Authors: | NK Sun SN XuYB Gao TB JiYB Li |
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Institution: | a School of Science, Shenyang Ligong University, Shenyang 110159, PR China b Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, PR China |
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Abstract: | In this study the magnetic properties of Mn0.95Cr0.05As, prepared by mechanical milling, have been investigated. The results suggest that the presence of strains is very important for the magnetic state of the compound. In the presently studied compound, a combined magnetic and structural transition occurs from paramagnetic MnP phase to ferromagnetic NiAs phase at about 234 K. With further decreasing temperature, at 159 K, a transition from ferromagnetic NiAs phase to helimagnetic (Ha-type) MnP phase is observed, which is accompanied by an inverse magnetocaloric effect. The ferromagnetic phase is recovered when the temperature is increased. At both first-order transitions, at 159 and 234 K, large magnetic-entropy changes are observed. |
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Keywords: | Magnetic phase transitions Magnetocaloric effects |
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