Ferromagnetic Martensitic Transition and Magnetocaloric Effect in Ni_35Co_15-xV_xMn_35Ti_15 (x = 1, 2, 3) All-d-Metal Heusler Alloy Ribbons
Ferromagnetic Martensitic Transition and Magnetocaloric Effect in Ni_35Co_15-xV_xMn_35Ti_15 (x = 1, 2, 3) All-d-Metal Heusler Alloy Ribbons
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DOI：
10.1007/s10948-023-06508-5
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发表时间：
2023-01
影响因子：
1.8
通讯作者：
Yong Li;Xinyue Ye;Lijiang Lou;Longfei Wang;Liang Qin
中科院分区：
文献类型：
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作者：
Yong Li;Xinyue Ye;Lijiang Lou;Longfei Wang;Liang Qin
本文研究了Ni35Co15-xMn35Ti15（x = 1，2，3）全金属Heusler合金薄带的晶体结构、铁磁马氏体相变和磁热效应。所有三个样品在室温下在奥氏体中结晶纯B2立方相。随着V含量的增加，热磁曲线出现热滞现象，Arrott曲线出现负值，证明了一级相变的性质。正/逆马氏体转变温度（Tt/Tt '）从236（248）K（x = 1）单调降低到82（110）K（x = 3），奥氏体居里温度（TCA）也降低。在外加磁场作用下，也可以观察到明显的磁致马氏体相变。当磁场变化为50kOe时，最大磁熵变分别为17.2，18.7，9.6J/kgK。在磁场变化为50 kOe时，制冷剂容量（RC）和相对制冷功率（RCP）分别达到194.7（240.8）、244.3（300.0）、162.4（201.6）J/kg。
In this work, crystal structure, ferromagnetic martensitic transition, and magnetocaloric effect were investigated for Ni35Co15-xVxMn35Ti15(x= 1, 2, 3) all-d-metal Heusler alloy ribbons. All three samples crystalize pure B2 cubic phase in austenite at room temperature. With increasing V content, the appearance of thermal hysteresis of thermomagnetic curves, together with the negative values of Arrott plots, proves the nature of first-order transition. And normal/reverse martensitic transition temperature (Tt/Tt’) monotonously decreases from 236 (248) K (x= 1) to 82 (110) K (x= 3) and the Curie temperature in austenite (TCA) also decreases. Obvious magnetic-field-induced martensitic transition can also be seen with external magnetic field. Maximum magnetic entropy change values are 17.2, 18.7, 9.6 J/kgK with the magnetic field change of 50 kOe, respectively. The refrigerant capacity (RC) and relative cooling power (RCP), as two important parameters to evaluate the refrigeration performance, can reach 194.7 (240.8), 244.3 (300.0), 162.4 (201.6) J/kg with the magnetic field change of 50 kOe, respectively.