International Conference and Exhibition in Advanced Materials and Microscopy 2017 | |
Magnetic properties near the ferromagnetic-paramagnetic transformation in the austenite phase of Ni43Mn44X2Sn11 (X = Fe and Co) Heusler alloys | |
材料科学;物理学 | |
Nan, W.Z.^1 ; Thanh, T.D.^1 ; You, T.S.^2 ; Piao, H.G.^3 ; Yu, S.C.^1 | |
Department of Physics, Chungbuk National University, Cheongju | |
28644, Korea, Republic of^1 | |
Department of Chemistry, Chungbuk National University, Cheongju | |
28644, Korea, Republic of^2 | |
College of Science, China Three Gorges University, Yichang | |
443002, China^3 | |
关键词: Arc-melting methods; Argon atmospheres; Austenite phase; Austenitic phase; Ferromagnetic-paramagnetic; Magnetic entropy change; Magnetic phase transitions; Second-order phase transition; | |
Others : https://iopscience.iop.org/article/10.1088/1757-899X/343/1/012001/pdf DOI : 10.1088/1757-899X/343/1/012001 |
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学科分类:材料科学(综合) | |
来源: IOP | |
【 摘 要 】
In this work, we present a detail study on the magnetic properties in the austenitic phase (A phase) Ni43Mn44X2Sn11 alloy with X = Fe and Co, which were prepared by an arc-melting method in an argon atmosphere. The M(T) curves of two samples exhibits a single magnetic phase transition at the Curie temperature of the ferromagnetic (FM) austenitic phase with TCA = 298 K and 334k for (X = Fe and Co) respectively. Based on the Landau theory and M(H) data measured at different temperatures, we found that the FM-PM phase transitions around TCA in both samples were the second-order phase transition. Under an applied field change of 30 kOe, around TCA , the magnetic entropy changes were found to be 0.66 J Kg-1 K-1 and 1.62 J Kg-1 K-1 for (X = Fe and Co) respectively.
【 预 览 】
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Magnetic properties near the ferromagnetic-paramagnetic transformation in the austenite phase of Ni43Mn44X2Sn11 (X = Fe and Co) Heusler alloys | 450KB | download |