More accurate calculations of the magnetic entropy changes
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- 作者：Haishun Liu ; Xiexing Miao ; Peng Wang ; Min Yang ; Wankui Bu ; Duanming Li ; Youwei Du
- 关键词：Ferromagnetic shape memory alloy ; Magnetization curve ; Bicubic interpolation ; Magnetic entropy change
- 刊名：Journal of Magnetism and Magnetic Materials
- 出版年：2009
- 出版时间：October 2009
- 年：2009
- 卷：321
- 期：19
- 页码：3221-3224
- 全文大小：274 K
文摘
A series of Ni44−xCoxMn45Sn11 (x=0, 1, 2) alloys were prepared by means of arc melting, magnetization curves under different temperatures were measured using vibrating sample magnetometer. The bicubic interpolations method was employed to calculate the magnetization M(T, H), and the magnetic entropy changes were figured out using the thermodynamic relation of magnetic materials. Results show that the values calculated based on the bicubic interpolation method are more accurate compared with those from conventional method, and the curves obtained are relatively smooth.