magnetic exchange coupling

magnetic exchange coupling

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時(shí)間:2019-08-05

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1、ExperimentalStudyofNanoscaleExchangeCouplingXiaoQunfengExperimentalStudyofNanoscaleExchangeCouplingACADEMISCHPROEFSCHRIFTterverkrijgingvandegraadvandoctoraandeUniversiteitvanAmsterdamopgezagvandeRectorMagnificusprof.mr.P.F.vanderHeijdentenoverstaanvaneendoor

2、hetcollegevoorpromotiesingesteldecommissie,inhetopenbaarteverdedigenindeAuladerUniversiteitopwoensdag26maart2003te10.00uurdoorXiaoQunfengGeborenteShenyang,P.R.ChinaPromotores:Prof.Dr.F.R.deBoerProf.Dr.K.H.J.BuschowCo-promotor:Dr.E.BrückOverigeleden:Prof.Dr.I

3、.R.HarrisProf.Dr.D.GivordProf.Dr.H.W.ZandbergenProf.Dr.R.Gr?ssingerProf.Dr.J.J.M.FranseFaculteitderNatuurwetenschappen,WiskundeenInformaticaThisworkwassupportedbytheprogramoftheDutchResearchSchoolCOM-OP,theexchangeprogrambetweenP.R.ChinaandTheNetherlands.The

4、workdescribedinthisthesiswascarriedoutatthe:VanderWaals-ZeemanInstitute,UniversityofAmsterdamValckenierstraat65,1018XEAmsterdam,TheNetherlandsandatthe:InstituteofMetalResearch,ChineseAcademyofSciences110015ShenyangP.R.Chinawherealimitednumberofcopiesofthethe

5、sisisavailableISBN:90-5776-098-3PresentthisthesistomydearfatherProf.XiaoXugang(02/05/1921-02/12/1994)ContentsChapter1Introduction…………………………….………..11.1Historicalsummary..……………………….11.2Fourth-generationpermanentmagnets……..21.3Compositepermanent-magnetmaterials

6、…..41.4Reviewofexperimentalstudiesofnanocompositepermanentmagnet…………51.5Motivationofthepresentwork……………..8References…………………………………………..9Chapter2Theoryofnanometerexchangecoupling……112.1One-dimensionalmodel…………..………...112.2Effectofexchangecouplingonthemacro-mag

7、neticproperties…..……………...142.3Three-dimensionaltheory……….………….16References…………………………………………..19Chapter3Experimentalmethods…………...……………..213.1Samplepreparation……………..…………..213.2Structure,microstructureandphaseanalysis233.3Magneticmeasurements………………..…..25Refe

8、rences…………………………………………..26Chapter4Effectofexchangecouplinginnanocompositetwo-phaseNd-Fe-Bmagnets…………………..274.1Introduction…………………………………274.2Experimental……….……………………….294.3Resultsanddiscussion………

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