Nyob rau hauv cov ntaub ntawv ferromagnetic, pawg me ntawm atoms ua ke rau hauv cov cheeb tsam hu ua domains, nyob rau hauv uas tag nrho cov electrons muaj tib yam sib nqus orientation… ib txoj hauv kev uas qhov kev taw qhia sib nqus ntawm ib lub tshuab hluav taws xob tshem tawm qhov kev taw qhia ntawm lwm tus.
Yuav ua li cas sib nqus domains nyob rau hauv cov hlau nplaum?
Yuav ua li cas cov hlau nplaum sib nqus nyob rau hauv cov khoom sib nqus? Ib pawg ntawm cov atoms uas muaj lawv cov chaw sib nqus nyob rau hauv tib txoj kev yog hu ua magnetic domain. Tag nrho cov khoom sib nqus ua haujlwm zoo li lub nplhaib hlau nplaum nrog rau sab qaum teb thiab sab qab teb ncej.
Yuav ua li cas sib nqus domains dlhos?
Ib lub npe sib nqus yog ib cheeb tsam hauv cov khoom sib nqus uas cov hlau nplaum yog nyob rau hauv ib qho kev coj ua. Qhov no txhais tau hais tias tus kheej lub sijhawm sib nqus ntawm cov atoms tau ua raws li ib leeg thiab lawv taw qhia tib yam… Cov no yog cov khoom siv ferromagnetic, ferrimagnetic thiab antiferromagnetic.
Dab tsi yog cov khoom hauv cov khoom sib nqus?
Ib tus sau yog thaj av sab hauv ntawm cov khoom siv uas cov pab pawg ntawm lub sijhawm sib nqus ib txwm nyob rau hauv tib qho kev taw qhiaMuaj peev xwm muaj ntau yam hauv ib yam khoom. Thaum tsis muaj sab nraud magnetic teb tam sim no, cov thawj kuj tau taw qhia random kom tsis muaj net magnetic teb.
Dab tsi yog qhov loj me ntawm cov khoom sib nqus?
Cov qhov ntev ntawm cov thawj yog 0.1 txog 1 mm. Thaum cov khoom siv ferromagnetic tsis magnetized nws tseem muaj cov thawj, tab sis cov domains muaj random magnetization cov lus qhia.
