资源描述：
《Giant magnetic-field-induced strain in NiMnGa seven-layered APL8001746.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、APPLIEDPHYSICSLETTERSVOLUME80,NUMBER1011MARCH2002Giantmagnetic-field-inducedstraininNiMnGaseven-layeredmartensiticphasea)A.Sozinov,A.A.Likhachev,N.Lanska,andK.UllakkoHelsinkiUniversityofTechnology,P.O.Box6200,FIN-02015HUT,Finland~Received13November2001;a
2、cceptedforpublication4January2002!Giantmagnetic-®eld-inducedstrainofabout9.5%wasobservedatambienttemperatureinamagnetic®eldoflessthan1TinNiMnGaorthorhombicseven-layeredmartensiticphase.Thestrainprovedtobecausedbymagnetic-®eld-controlledtwinboundarymotio
3、n.Accordingtoananalysisofx-raydiffractiondata,thecrystalstructureofthisphaseisnearlyorthorhombic,havinglatticeparametersa50.619nm,b50.580nm,andc50.553nm~incubicparentphasecoordinates!atambienttemperature.Seven-layershuf¯ing-typemodulationalongthe(110)@1
4、1Å0#psystemwasrecorded.Theresultsofmechanicaltestsandmagneticanisotropypropertymeasurementsarealsoreported.©2002AmericanInstituteofPhysics.@DOI:10.1063/1.1458075#1,2In1996Ullakkosuggestedthemechanismofroomtemperature.Single-crystalsampleswerethencutbyas
5、parkcuttingmachinewithdimensionsof43436mm3.magnetic-®eld-inducedstraininmagneticshapememoryal-loyswithlargemagneticanisotropy.ThemechanismisbasedThefacesoftheprismaticsingle-crystalsampleswerenearlyonthemagnetic-®eld-inducedrearrangementofthecrystal-par
6、alleltothe@100#,@010#,and@001#directionsofthehigh-lographicdomains~twinvariants!thatlowermagnetizationtemperaturecubicphase.Thesampleswerealsowetpol-energy.Itcanprovidelargestrainsimilartoastress-inducedishedandelectropolished.one.Magneticshapememorymat
7、erialsareexpectedtohaveFigure1showsthetemperaturedependenceofthelow-ahighpotentialinthedesignofadifferentkindofactuating®eldacmagneticsusceptibilityofthealloyduringheatingdevicesandsensors.1,2Duringthefewpastyears,signi®cantandcooling.Theabruptchangeint
8、hevalueofthesuscepti-progressbasedonthisgeneralideaofdesigninganewclassbilityat367±369Kisattributedtoparamagnetic±ofmagneticshapememoryalloys~MSMAs!andadetailedferromagnetictransformationoftheL21cubicphase.Theinvestigationofthemh
