Ikhono likakazibuthe unomphela lokusekela insimu yamagnetic yangaphandle kungenxa ye-crystal anisotropy ngaphakathi kwempahla kazibuthe "evala" izizinda ezincane ezizibuthe endaweni.Uma i-magnetization yokuqala isisunguliwe, lezi zikhundla zihlala zifana kuze kube yilapho kusetshenziswa amandla adlula isizinda kazibuthe esikhiyiwe, namandla adingekayo ukuze aphazamise insimu kazibuthe ekhiqizwa uzibuthe unomphela ayahlukahluka kwinto ngayinye.Ozibuthe baphakade bangakwazi ukukhiqiza amandla amakhulu kakhulu (Hcj), agcine ukuqondana kwesizinda lapho kukhona izindawo eziphakeme kazibuthe zangaphandle.

Ukuzinza kungachazwa njengezinto eziphindaphindayo kazibuthe zento engaphansi kwezimo ezithile ngesikhathi sokuphila kukazibuthe.Izinto ezithinta ukuzinza kukazibuthe zihlanganisa isikhathi, izinga lokushisa, izinguquko zokungabaza, izindawo ezinozibuthe ezimbi, imisebe, ukushaqeka, ingcindezi, nokudlidliza.

Isikhathi sinomthelela omncane kumazibuthe anamuhla ahlala njalo, izifundo ezibonise ushintsho ngokushesha ngemva kokusebenza kazibuthe.Lezi zinguquko, ezaziwa ngokuthi "i-magnetic creep," zenzeka lapho izizinda kazibuthe ezizinzile zithinteka ukushintshashintsha kwamandla kazibuthe, ngisho nasezindaweni ezizinzile ngokushisa.Lokhu kuhluka kuncipha njengoba inani lezifunda ezingazinzile lincipha.

Ozibuthe bomhlaba abangavamile mancane amathuba okuba bathole lo mphumela ngenxa yokuphoqwa kwabo okuphakeme kakhulu.Ucwaningo oluqhathanisekayo lwesikhathi eside kuqhathaniswa ne-flux kazibuthe lubonisa ukuthi omazibuthe abasanda kufakwa unomphela balahlekelwa inani elincane le-flux kazibuthe ngokuhamba kwesikhathi.Amahora angaphezu kuka-100,000, ukulahleka kwempahla ye-samarium cobalt ngokuyisisekelo kunguziro, kuyilapho ukulahlekelwa kokungena okuphansi kwe-Alnico impahla kungaphansi kuka-3%.

Imiphumela yezinga lokushisa iwela ezigabeni ezintathu: ukulahlekelwa okungahlehliswa, ukulahlekelwa okungabuyiseleki emuva kodwa okubuyisekayo, nokulahlekelwa okungenakulungiseka nokungabuyiseki.

Ukulahlekelwa Okuhlehliswayo: Lokhu ukulahlekelwa okubuyayo lapho uzibuthe ebuyela ekushiseni kwawo kwasekuqaleni, ukuzinzisa kazibuthe unomphela akukwazi ukususa ukulahlekelwa okubuyisela emuva.Ukulahlekelwa okubuyisela emuva kuchazwa yi-temperature coefficient (Tc), njengoba kuboniswe kuthebula elingezansi.I-Tc ichazwa njengephesenti ngedigri Celsius, lezi zinombolo ziyahlukahluka ngebanga elithile lempahla ngayinye, kodwa zimele isigaba sezinto ezibonakalayo sisonke.Lokhu kungenxa yokuthi ama-coefficients okushisa e-Br ne-Hcj ahluke kakhulu, ngakho ijika le-demagnetization lizoba "nephoyinti lokuguquguquka" ekushiseni okuphezulu.

Ukulahlekelwa okungenakuhlehliswa kodwa okubuyiselekayo: Lokhu kulahlekelwa kuchazwa ngokuthi ukukhishwa kukazibuthe ngokwengxenye ngenxa yokuchayeka emazingeni okushisa aphezulu noma aphansi, lokhu kulahlekelwa kungatholwa kuphela ngokuphinda uzibuthe, i-magnetism ayikwazi ukululama lapho izinga lokushisa libuyela enanini layo langempela.Lokhu kulahlekelwa kwenzeka lapho indawo yokusebenza kukazibuthe ingaphansi kwephuzu lokuguquguquka lejika le-demagnetization.Idizayini kazibuthe esebenzayo ehlala njalo kufanele ibe nesekhethi kazibuthe lapho uzibuthe esebenza khona ngokufinyelela okuphezulu kunephoyinti lokuguquguquka kwejika lokususa uzibuthe ezingeni lokushisa elilindelekile, elizovimbela izinguquko zokusebenza kumazinga okushisa aphezulu.

Ukulahlekelwa Okungenakulungiseka Okungenakulungiseka: Ozibuthe abavezwe emazingeni okushisa aphakeme kakhulu benza izinguquko ze-metallurgical ezingakwazi ukutholwa ngokusebenza kabusha uzibuthe.Ithebula elilandelayo libonisa izinga lokushisa elibalulekile lezinto ezihlukahlukene, lapho: I-Tcurie izinga lokushisa le-Curie lapho umzuzu wamagnetic oyisisekelo uhlelwa ngokungahleliwe futhi okokusebenza kukhishwa kazibuthe;I-Tmax izinga lokushisa eliphezulu elisebenzayo lezinto eziyinhloko esigabeni esijwayelekile.

Ozibuthe benziwa ukuthi izinga lokushisa lizinze ngokukhipha uzibuthe ngokwengxenye ngokuwachaya emazingeni okushisa aphezulu ngendlela elawulwayo.Ukuncipha kancane kokuminyana kwe-flux kuthuthukisa ukuzinza kukazibuthe, njengoba izizinda ezingaqondile zingabokuqala ukulahlekelwa ukuma kwazo.Ozibuthe abanjalo bazobonisa ukuguquguquka kazibuthe njalo lapho bevezwe emazingeni okushisa alinganayo noma aphansi.Ukwengeza, iqoqo elizinzile lomazibuthe lizobonisa ukuhlukahluka okuphansi kokuguquguquka uma kuqhathaniswa namanye, njengoba ingaphezulu lejika lensimbi elinezici ezivamile ezihlukile lizoba seduze nevelu yokuguquguquka kwenqwaba.