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内容简介

  《磁性物理学和磁性材料》是一部讲述磁性基础理论的教程。书中讲述了磁矩起源,应用磁性场的响应,不同的相互作用产生了固体中磁序的不同形式,及其许多例子。书中以能够让读者充分理解材料性质的深度讲述了晶场模拟效应,晶场模拟效应在材料性质的扮演着重要角色,并以同样深度讲述了巡回电子磁性。书中还特别讲述了磁晶磁性各向异性和磁热效应,一般磁性计算知识也得以呈现。书中有一半的内容用于讲述磁性材料和性质,这使得其应用广泛。另外,《磁性物理学和磁性材料》很有技巧地讲述了永磁体、高密度记录材料、软磁性材料、invar合金和磁控材料。
  目次:引入;原子矩的起源;自由离子的顺磁性;磁性有序状态;晶体场;逆磁性;巡回电子磁性;基本概念和单位;测量技巧;磁性材料中的热效应;磁性的各向异性;永磁体;高密度记录材料;软磁性材料;invar合金;磁控材料。
  读者对象:物理专业、材料科学和工程以及电子工程材料的高年级本科生和研究生,以及相关专业的科研人员。

目录

chapter1.introduction
chapter2.theoriginofatomicmoments
2.1.spinandorbitalstatesofelectrons.
2.2.thevectormodelofatoms

chapter3.paramagnetismoffreeions
3.1.thebriliouinfunction
3.2.thecurielaw
references

chapter4.themagneticallyorderedstate
4.1.theheisenbergexchangeinteractionandtheweissfield
4.2.ferromagnetism
4.3.antiferromagnetism
4.4.ferrimagnetism
references

chapter5.crystalfields
5.1.introduction
5.2.quantum-mechanicaltreatment
5.3.experimentaldeterminationofcrystal-fieldparameters
5.4.thepoint-chargeapproximationanditslimitations
.5.5.crystal-field-inducedanisotropy
5.6.asimplifiedviewof4f-electronanisotropy
references

chapter6.diamagnetism
reference

chapter7.itinerant-electronmagnetism
7.1.introduction
7,2.susceptibilityenhancement
7.3.strongandweakferromagnetism
7.4.intersublatticecouplinginalloysofrareearthsand3dmetals
references

chapter8.somebasicconceptsandunits
references

chapter9.measurementtechniques
9.1.thesusceptibilitybalance
9.2.thefaradaymethod
9.3.thevibrating-samplemagnetometer
9.4.thesquidmagnetometer
references

chapter10.caloriceffectsinmagneticmaterials
10.1.thespecific-heatanomaly
10.2.themagnetocaloriceffect
references

chapter11.magneticanisotropy
references

chapter12.permanentmagnets
12.1.introduction
12.2.suitabilitycriteria
12.3.domainsanddomainwalls
12.4.coercivitymechanisms
12.5.magneticanisotropyandexchangecouplinginpermanent-magnetmaterialsbasedonrare-earthcompounds
12.6.manufacturingtechnologiesofrare-earth-baseamagnets
12.7.hardferrites
12.8.alnicomagnets
references

chapter13.high-densityrecordingmaterials
13.1.introduction
13.2.magneto-opticalrecordingmaterials
13.3.materialsforhigh-densitymagneticrecording
references

chapter14.soft-magneticmaterials
14.1.introduction
14.2.surveyofmaterials
14.3.therandom-anisotropymodel
14.4.dependenceofsoft-magneticpropertiesongrainsize
14.5.headmaterialsandtheirapplications
14.5.1high-densitymagnetic-inductionheads
14.5.2magnetoresistiveheads
references

chapter15.invaralloys
references
chapter16.magnetostrictivematerials
references
authorindex
subjectindex

前言/序言

  ThefirstaccountsofmagnetismdatebacktotheancientGreekswhoalsogavemagnetismitsname.ItderivesfromMagnesia,aGreektownandprovinceinAsiaMinor,theetymologicaloriginoftheword"magnet"meaning"thestonefromMagnesia."Thisstoneconsistedofmagnetite(Fe304)anditwasknownthatapieceofironwouldbecomemagnetizedwhenrubbedwithit.
  Moreseriouseffortstousethepowerhiddeninmagneticmaterialsweremadeonlymuchlater.Forinstance,inthe18thcenturysmallerpiecesofmagneticmaterialswerecombinedintoalargermagnetbodythatwasfoundtohavequiteasubstantialliftingpower.ProgressinmagnetismwasmadeafterOersteddiscoveredin1820thatamagneticfieldcouldbegeneratedwithanelectriccurrent.Sturgeonsuccessfullyusedthisknowledgetoproducethefirstelectromagnetin1825.Althoughmanyfamousscientiststackledthephenomenonofmagnetismfromthetheoreticalside(Gauss,Maxwell,andFaraday)itismainly20thcenturyphysicistswhomusttakethecreditforgivingaproperdescriptionofmagneticmaterialsandforlayingthefoundationsofmoderntechnology.CurieandWeisssucceededinclarifyingthephenomenonofspontaneousmagnetizationanditstemperaturedependence.TheexistenceofmagneticdomainswaspostulatedbyWeisstoexplainhowamaterialcouldbemagnetizedandneverthelesshaveanetmagnetizationofzero.ThepropertiesofthewallsofsuchmagneticdomainswerestudiedindetailbyBloch,Landau,andNeel.
  Magneticmaterialscanberegardednowasbeingindispensableinmoderntechnology.Theyarecomponentsofmanyelectromechanicalandelectronicdevices.Forinstance,anaveragehomecontainsmorethanfiftyofsuchdevicesofwhichtenareinastandardfamilycar.Magneticmaterialsarealsousedascomponentsinawiderangeofindustrialandmedicalequipment.Permanentmagnetmaterialsareessentialindevicesforstoringenergyinastaticmagneticfield.Majorapplicationsinvolvetheconversionofmechanicaltoelectricalenergyandviceversa,ortheexerfonofaforceonsoftferromagneticobjects.Theapplicationsofmagneticmaterialsininformationtechnologyarecontinuouslygrowing.
  Inthistreatment,asurveywillbegivenofthemostcommonmodernmagneticmate-rialsandtheirapplications.Thelattercomprisenotonlypermanentmagnetsandinvaralloysbutalsoincludeverticalandlongitudinalmagneticrecordingmedia,magneto-opticalrecordingmedia,andheadmaterials.Manyofthepotentialreadersofthistreatisemayhavedevelopedconsiderableskillinhandlingtheoften-complexequipmentofmodeminformationtechnologywithouthavinganyknowledgeofthematerialsusedfordatastor-ageinthesesystemsandthephysicalprinciplesbehindthewritingandthereadingofthedata.Specialattentionisthereforedevotedtothesesubjects.
  AlthoughthetopicMagneticMaterialsisofahighlyinterdisciplinarynatureandcom-binesfeaturesofcrystalchemistry,metallurgy,andsolidstatephysics,themainemphasiswillbeplacedhereonthosefundamentalaspectsofmagnetismofthesolidstatethatformthebasisforthevariousapplicationsmentionedandfromwhichthemostsalientoftheirpropertiescanbeunderstood.
  Itwillbeclearthatallthesematterscannotbeproperlytreatedwithoutadiscussionofsomebasicfeaturesofmagnetism.Inthefirstpartabriefsurveywillthereforebegivenoftheoriginofmagneticmoments,themostcommontypesofmagneticordering,andmolecularfieldtheory.Attentionwillalsobepaidtocrystalfieldtheorysinceitisaprereq-
  uisiteforagoodunderstandingoftheoriginofmagnetocrystallineanisotropyinmodempermanentmagnetmaterials.Thevariousmagneticmaterials,theirspecialproperties,andtheconcomitantapplicationswillthenbetreatedinthesecondpart.

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