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时间:2020-05-04
《Co掺杂对Ni—Mn—Sn铁磁形状记忆合金磁性质的影响-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、Availableonlineat、^n^n^,.sciencedirect.com一Transacfionsof繇ScienceDirectNonferrousMetals爱SocietyofChinaPressTrans.NonferrousMet.Soc.China24(201411053—1057www.tnmsc.cnEffectofCosubstitutiononmagneticpropertiesofNi·——Mn。——SnmagneticshapememoryalloysJia—muCAO,Chang—longTAN,Xiao—huaTIAN,Q
2、in.ciLI,Er-junGUO,Li.pingWANG,Yi-jiangCAO1.SchoolofAppliedScience,HarbinUniversityofScienceandTechnology,Harbin150080,China;2.SchoolofMaterialsScienceandEngineering,HarbinUniversityofScienceandTechnology,Harbin150080,ChinaReceived27March2013;accepted15October2013Abstract:TheefrectofC
3、osubstitutiononmagneticpropertiesofNi-Mn—Snshapememowalloywasrevealedbyfirst.principlescalculations.LargemagnetizationdiferenceinNi-Mn—SnalloyobtainedbyadditionofCoarisesfromenhancementofmagnetizationofausteniteduetochangeofMn-Mninteractionfromanti.ferromagnetismtoferromagnetism.Tbta
4、lenergydiferencebetweenparamagneticandferromagneticansteniteplaysanimportantroleinmagnetictransitionofNi-Co-Mn-Sn.ThealteredMn3dstatesduetoCosubstitutiongiverisetodiferenceinmagneticproperties.Keywords:feromagneticshapememo~alloys;Ni——Mn-Sn;first—principlescalculation;magneticpropert
5、iessubstitutionofCoforNiinNi一Ⅳ【n—Snalloysisan1IntrOductiOnefectivewaytoincreasethediferenceinmagnetizationbetweenausteniteandmartensitephases『15,161.0fr.stoichiome仃icNi-Mn-SnferromagneticshapeRecently,themagneticpropertiesofNi—Mn—SnandmemoryalloyshaveattractedgreatinterestduetotheNi—
6、Co—Mn—Snalloyshavebeenstudiedbyneutronobservationsofmagneticfield.inducedreversepowderdiffractionsanditisfoundthattheferromagneticmartensitic仃ansformation『1—41.ThemagnetizationinenhancementinNi—Co-Mn-Snocc~sasresultofthemartensitephaseofthesealloysissmallerthanthatinchangeinthemagnet
7、icstructureduetothesubstitutiontheausteniteone.Ni—Mn—SnalloysundergomartensiticofCo『16].Sofar,althoughCosubstitutionhastransformationinamagneticallyorderedstate,andtheprominentefectsonmagneticpropertiesandmagneticinterplaybetweenthestructureandmagnetismgivesrisefield.inducedreversema
8、rtensitictra
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