Sb对Mn_(50)Ni_(40)In_(10)合金相变及磁性的影响  

Influence of Sb on the Magnetic and Transformation Properties of Mn_(50)Ni_(40)In_(10)

作　　者：李歌天[1] 柳祝红[1] 马星桥[1] 

机构地区：[1]北京科技大学物理系,北京100083

出　　处：《材料导报》2013年第16期10-13,共4页Materials Reports

基　　金：国家自然科学基金(51001010);教育部博士点基金新教师基金(20100006120001)

摘　　要：研究了Sb替代部分In对铁磁性形状记忆合金材料Mn50Ni40In10相变和磁性的影响。研究表明,在掺杂后形成的Mn50Ni40In10-x Sbx系列合金中,随着Sb含量的增加,马氏体的逆相变温度逐渐升高,居里温度逐渐降低。其相变温度的升高主要归结于电子浓度和晶格体积的变化以及电子轨道的杂化作用。Sb掺杂会导致样品马氏体相和奥氏体相之间的饱和磁化强度差ΔM的变化,x<0.6的微量掺杂会使ΔM增大,x>0.6时,ΔM随着掺杂量的增加而逐渐降低甚至减为零。x=0.6的样品(Mn50Ni40In9.4Sb0.6)在20kOe的外场作用下ΔM达到74emu/g,同时在该材料中观察到了磁场驱动的马氏体到奥氏体的转变,显示出该材料作为磁驱动形状记忆材料的潜在应用前景。The magnetic and martensitic transformation properties of partially Sb doped In in Mn50Ni40In10 alloy were studied. It was found that the critical temperature of the reverse martensitic transformation TM increased and the Curie temperature Tc decreased with increasing Sb concentration x in Mn50Ni40In10 -x Sbx alloys. The raising of TM was due to the variations of the electronic concentration and lattice volume as well as hybridation of the electronic orbits. As Sb concentration x is less than 0. 6, the saturated magnetization difference △M between martensite and austenite in- creased with Sb doping. However, as Sb concentration x is above 0.6, △M decreased with Sb doping. It is noted that increased rapidly to 74 emu/g as x=0. 6 in a field of 20 kOe, and a field-induced martensite to austenite transfor- mation was observed in this alloy, indicating the potential application as the magnetic actuation materials.

关 键 词：磁性形状记忆合金 磁驱动马氏体相变 MnNiInSb 

分 类 号：TB34[一般工业技术—材料科学与工程]