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1、V007tp.indd18/4/085:08:27PMThispageintentionallyleftblankeditedbySergejODemokritovUniversityofMünster,GermanyV007tp.indd28/4/085:08:35PMA-PDFMergerDEMO:Purchasefromwww.A-PDF.comtoremovethewatermarkPublishedbyPanStanfordPublishingPte.Ltd.5TohTuckLinkSingapore596224Dist
2、ributedbyWorldScientificPublishingCo.Pte.Ltd.5TohTuckLink,Singapore596224USAoffice:27WarrenStreet,Suite401-402,Hackensack,NJ07601UKoffice:57SheltonStreet,CoventGarden,LondonWC2H9HEBritishLibraryCataloguing-in-PublicationDataAcataloguerecordforthisbookisavailablefromth
3、eBritishLibrary.SPINWAVECONFINEMENTCopyright©2009byPanStanfordPublishingPte.Ltd.Allrightsreserved.Thisbook,orpartsthereof,maynotbereproducedinanyformorbyanymeans,electronicormechanical,includingphotocopying,recordingoranyinformationstorageandretrievalsystemnowknownort
4、obeinvented,withoutwrittenpermissionfromthePublisher.Forphotocopyingofmaterialinthisvolume,pleasepayacopyingfeethroughtheCopyrightClearanceCenter,Inc.,222RosewoodDrive,Danvers,MA01923,USA.Inthiscasepermissiontophotocopyisnotrequiredfromthepublisher.ISBN-13978-981-4241
5、-06-9ISBN-10981-4241-06-7PrintedinSingapore.Rhaimie-SpinWaveConfinement.pmd16/19/2008,3:32PMMay29,200822:37WorldScienti cBook-9inx6inIntroDemokritovINTRODUCTIONTheconceptofdynamiceigenmodesofuncon nedmagneticmediacalledspinwaveswasintroducedbyBlochin1930.Aspinwaverepr
6、esentsawaveofspinprecessionpropagatinginamagneticallyorderedmedium.Earlyexperimentalevidencefortheexistenceofspinwavescamefrommeasure-mentsofthermodynamicpropertiesofferromagnets,inparticularthetem-peraturedependenceoftheirsaturationmagnetization.The rstdirectobservat
7、ionofspinprecessionwasmadeusingferromagneticresonancebyGrithsin1946forthecaseofuniformprecessionwhichcanbetreatedasaspinwavewiththezerowavevector.LaterinelasticlightscatteringexperimentsperformedbyFleury,Porto,Cheesman,andGuggenheimin1966havecon rmedtheexistenceofspi
8、nwaves.Inmanyaspectsspinwavescanbeconsideredasamagneticanalogueofsound.However,asitwillbediscussedinthisbook,themaindi erenc
