资源描述：
《particulate magnetic recording media a review外语英文电子书》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、4314IEEETRANSACTIONSONMAGNETICS.VOL25,NO.6.NOVEMBER1989ParticulateMagneticRecordingMedia:AReviewMICHAELP.SHARROCKAbstract-Mostrecordingmedia(tapesanddisks)aremadebytheforuseinrecordingmedia.Morethoroughtreatmentsarewell-establishedtechniqueofcoatingasupportmaterialwithadisper-a
2、vailable[11-[5].Theinformationtoberecorded,whethersionofdiscretemagneticparticlesinorganicbinders.Theparticlesrepresentingsound,image,ornumericaldata,isex-thataredispersedinsuchcoatingscanbechosenfromavarietyofcompositions,tofittheneedsofdiverseapplications.Afterdescribingpress
3、edasatime-varyingelectricalcurrent.Theschemesbrieflytheprinciplesofmagneticrecordingandthemanufactureoffordoingsuchencodingarebeyondthescopeofthisre-media,thisreviewfocusesonthehistory,characteristics,anddevel-viewandarediscussedelsewhere[11-[5].Therecordingopmenttrendsofthemos
4、timportantparticulatemagneticrecordingheadconsistsofasmallcoil,throughwhichthecurrentmaterials.Theseareacicularironoxides,chromiumdioxide,cobalt-passes,andagappedmagneticstructurethatintensifiesmodifiedironoxides,acicularmetalparticles,andbariumferrite.Allcontinuetobesubjectsof
5、activeresearchanddevelopment,withaandlocalizestheresultingfield.Therecordingmediumcommonemphasisonverysmallparticlesize.consistsofamagneticmaterial,coatedonthesurfaceofatapeordiskthatmovesrelativetotheheadandincloseproximitytoitsgap.Theheadfieldmagnetizesthecoat-INTRODUCTIONing
6、accordingtothecurrentinthecoil,sothatthetime-MAGNETICrecordingisanextremelyimportantvaryingelectricalsignalisconvertedintoaspatiallyvary-technology.Itisprincipallyresponsiblefortheingmagneticpatternalongatrackonthemedium’ssur-widespread,relativelyinexpensiveuseofrecordedsoundfa
7、ce.Reversalsofthecurrentproducetransitionsbetweenandvideoimagesandis,alongwithsemiconductortech-regionsofoppositemagnetization.Theread-backprocessnology,oneofthetwofoundationsoftheexpansionininvolvesmovingthesurfaceonceagainpastthehead,orcomputerpower.Magneticrecordingproductsh
8、ave,inpastadifferentheadofanalogousstructure.Whenthisf
