Nyob rau hauv ib yam khoom uas tsis muaj hlau nplaum ferromagnetic, cov thawj yog me me thiab randomly taw qhia. Nyob rau hauv teb rau sab nraud magnetic teb, cov thawj yuav loj hlob mus rau millimeter loj, aligning lawv tus kheej raws li qhia nyob rau hauv ib feem (b) ntawm daim duab thib ob.
Dab tsi yog cov khoom hauv ferromagnetic?
Ferromagnetic domains yog thaj chaw me me hauv ferromagnetic cov ntaub ntawv nyob rau hauv uas tag nrho cov magnetic dipoles yog aligned parallel rau ib leeg.
Yuav ua li cas cov domains nyob rau hauv unmagnetized hlau?
Nyob rau hauv thaj chaw, cov ncej ntawm tus kheej atoms tau ua raws. Txhua lub atom ua zoo li cov hlau nplaum me me. Domains yog me me thiab randomly oriented nyob rau hauv ib qho khoom siv ferromagnetic tsis muaj hlau nplaum.… (a) Ib daim hlau uas tsis muaj hlau nplaum (lossis lwm yam khoom siv ferromagnetic) muaj qhov sib txawv ntawm qhov chaw.
Yuav ua li cas txhawm rau tsim cov npe sib nqus?
(Thaum atoms muaj electrons uas orbit los yog kiv nyob rau hauv feem ntau ib qho kev taw qhia, cov nyhuv net yog ib qho atomic hlau nplaum hu ua dipole.) Yuav ua li cas dlhos tsim magnetic domains? ( Cov atoms ntawm cov khoom sib nqus yog "atomic hlau nplaum" lossis dipolesthiab, thaum sib raug zoo, tsim cov khoom sib nqus.)
Thaum sib nqus sib nqus hauv cov khoom tuaj yeem ua raws?
Txawm li cas los xij, thaum muaj sab nraud magnetic teb yog tam sim no, cov thawj yuav tig thiab ua raws li cov hlau nplaum sab nraud. Thaum tag nrho lossis feem ntau ntawm cov thawj tswj hwm nyob rau hauv tib txoj kev, tag nrho cov khoom yuav magnetized nyob rau hauv cov kev taw qhia thiab ua ib tug hlau nplaum.
