Cov hlau nplaum mos, cov khoom sib nqus uas tsis muaj coercivity thiab siab permeability, yooj yim rau magnetize, kuj yooj yim rau demagnetize, dav siv hauv cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob. Feem ntau siv yog hlau-silicon alloys (silicon steel nplooj) thiab ntau yam mos sib nqus ferrites. Cov hlau nplaum tau muab faib ua cov hlau nplaum ruaj khov thiab cov hlau nplaum mos, cov hlau nplaum ruaj khov tau ntxiv rau cov hlau nplaum muaj zog, yog li cov kiv cua ntawm cov khoom sib nqus thiab cov electron angular momentum tau teem rau hauv cov kev taw qhia ruaj khov, cov hlau nplaum mos yog ntxiv rau tam sim no (tseem yog ib txoj hauv kev ntxiv cov hlau nplaum. ) thiab lwm yam tam sim no tshem tawm cov hlau mos yuav maj mam poob cov hlau nplaum.
