文章信息/Info

Title:

The magnetic and magnetocaloric properties in Cr-substituted ferrimagnetic Mn2Sb0.95In0.05 alloys

作者:

葛青1; 馮國芳2; 馬勝燦1; 2

 1. 江西理工大學稀土磁性材料與器件研究所（IREMMD），中華人民共和國，江西省贛州市，341000
2. 江西理工大學工程研究院，中華人民共和國，江西省贛州市，341000

Author(s):

 Qing Ge1;  Guofang Feng2;  Shengcan Ma1; 2

 1.The Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, People’s Republic of China
2.Insitute of Engineering & Research,  Jiangxi University of Science and Technology, Ganzhou 341000, People’s Republic of China

關鍵詞:

磁彈相變; 亞鐵磁; 自旋重取向相變; 磁熵變

DOI:

10.7502/j.issn.1674-3962.2017.09.05

文獻標志碼:

A

摘要:

文章研究了Cr取代Mn后亞鐵磁性Mn2-xCrxSb0.95In0.05（x = 0.05,0.09,0.13）合金的磁性和磁熱性能。室溫XRD證實合金中具有正交Cu2Sb型結構的主相。 由于反鐵磁中有高磁響應，因此從XRD圖譜中能觀察到少量的鐵磁MnSb雜相。隨著溫度的降低，在這些合金中，發(fā)生了亞鐵磁到反鐵磁的一級磁致彈性轉變。 同時，在亞鐵磁區(qū)域觀察到兩個自旋重新取向轉變。 由于反鐵磁 - 亞鐵磁的轉變過程中磁化強度突變，使得在Mn1.91Cr0.09Sb0.95In0.05合金中在0-10kOe的磁場變化中獲得高達1.63J/kgK的大磁熵變。

Abstract:

The magnetic and magnetocaloric properties were studied in Cr-substituted ferrimagnetic Mn2-xCrxSb0.95In0.05 (x=0.05, 0.09, 0.13) alloys. A main phase with the tetragonal Cu2Sb-type structure was confirmed by XRD methodology at room temperature for these compounds.  A small amount of MnSb impurity phase of which is a ferromagnet is also observed from the XRD patterns, being responsible for the high magnetic response in the antiferromagnetic state. In these alloys, Cr-substitution for Mn results in a first-order magnetoelastic transition from ferrimagetic to antiferromagnetic state with decreasing temperature. Simultaneously, two spin-reorientation transitions are observed during the ferrimagnetic region. Owing to the abrupt change in magnetization around the antiferromagnetic-ferrimagetic transition, large magnetic entropy change as high as 1.63 J/kgK in Mn1.91Cr0.09Sb0.95In0.05 alloy under the magnetic field change of 0-10 kOe are obtained.