Cov khoom siv hlau nplaum yog hais txog thaum cov hlau nplaum tshwm sim ntawm Hc tsis siab dua 1000A / m, cov khoom no hu ua mos hlau nplaum. Ib qho khoom siv sib nqus zoo tuaj yeem ua tiav qhov siab tshaj plaws magnetization nrog qhov tsawg tshaj plaws sab nraud magnetic teb. Cov ntaub ntawv sib nqus mos yog cov khoom sib nqus nrog qis coercivity thiab siab permeability.
Cov ntaub ntawv mos magnetic yog yooj yim rau magnetize thiab yooj yim rau demagnetize, thiab yog dav siv nyob rau hauv cov khoom siv hluav taws xob thiab hluav taws xob. Cov khoom siv hlau nplaum uas siv dav tshaj plaws yog hlau-silicon alloys (silicon steel sheets) thiab ntau yam mos ferrites.
