Magnetoresistance and exchange bias in high Mn content melt-spun Mn_(46)Ni_(42)Sn_(11)Sb_1 alloy ribbon  

作　　者：黄庆学 陈峰华 张敏刚 许小红 

机构地区：[1]Heavy Machinery Engineering Research Center of Education Ministry, College of Mechanical Engineering,Taiyuan University of Science and Technology [2]School of Chemistry and Materials Science, Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Shanxi Normal University

出　　处：《Chinese Physics B》2016年第5期316-320,共5页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2012CB722801);the Postdoctoral Science Foundation of China(Grant No.2015M571285);the National Natural Science Foundation of China(Grant No.51401140);the Postdoctoral Research Station Foundation of Taiyuan University of Science and Technology,China(Grant Nos.20142014,20152041,and 20151082);the Natural Science Foundation of Shanxi Province,China(Grants Nos.2015021019,2015091011,and 2015081011);the Key Team of Scientific and Technological Innovation of Shanxi Province,China(Grant No.2013131009)

摘　　要：Highly textured Heusler alloy Mn_（46）Ni_（42）Sn_（11）Sb_1 ribbons were prepared by melt spinning. The annealed high Mn content Mn46Ni42Sn11Sb1 ribbon cross-section microstructure, crystal structure, martensitic transformation（MT）, and magnetoresistance（MR） properties were investigated. The MR in the annealed ribbon was assessed by the magnetic field direction perpendicular to the ribbon surface with the magnetic field up to 30 k Oe. The large negative value of 25% for MR was obtained at 244 K. The exchange bias（EB） effects of the as-spun and annealed ribbons were investigated. After annealing, the EB effects have been improved by about 25 Oe at the temperature of 50 K. The magnetizations have increased approximately by 10% more than the as-spun ribbon.Highly textured Heusler alloy Mn_（46）Ni_（42）Sn_（11）Sb_1 ribbons were prepared by melt spinning. The annealed high Mn content Mn46Ni42Sn11Sb1 ribbon cross-section microstructure, crystal structure, martensitic transformation（MT）, and magnetoresistance（MR） properties were investigated. The MR in the annealed ribbon was assessed by the magnetic field direction perpendicular to the ribbon surface with the magnetic field up to 30 k Oe. The large negative value of 25% for MR was obtained at 244 K. The exchange bias（EB） effects of the as-spun and annealed ribbons were investigated. After annealing, the EB effects have been improved by about 25 Oe at the temperature of 50 K. The magnetizations have increased approximately by 10% more than the as-spun ribbon.

关 键 词：Heusler alloy melt spun MAGNETORESISTANCE exchange bias 

分 类 号：TG145[一般工业技术—材料科学与工程]