Cov hlau nplaum tas mus li hais txog cov hlau nplaum uas tuaj yeem khaws cov remanence siab rau lub sijhawm ntev hauv lub xeev qhib.
Basic tswvyim
Cov hlau nplaum uas tuaj yeem tswj tau lawv cov khoom sib nqus tau ntev yog hu ua cov hlau nplaum ruaj khov. Xws li cov hlau nplaum ntuj (magnetite) thiab cov hlau nplaum dag (AlNiCo alloy). Ntxiv nrog rau cov hlau nplaum tas mus li, tseem muaj cov hlau nplaum uas yuav tsum tau ua kom muaj zog kom sib nqus. Cov hlau nplaum tas mus li tseem hu ua cov hlau nplaum nyuaj, uas tsis yooj yim rau poob lawv cov hlau nplaum thiab tsis yooj yim rau cov hlau nplaum. Txawm li cas los xij, yog tias cov hlau nplaum ruaj khov tau ua kom sov siab tshaj qhov kub ntawm Curie, los yog muab tso rau hauv ib puag ncig nrog lub zog sib nqus siab nyob rau hauv qhov sib txawv, nws cov hlau nplaum kuj yuav txo qis lossis ploj mus. Qee cov hlau nplaum yog nkig thiab tuaj yeem tawg ntawm qhov kub thiab txias. Qhov siab tshaj plaws ua haujlwm kub yog tshaj 540 degree (1,{2}} degree F) rau AlNiCo hlau nplaum, kwv yees li 300 degree (570 degree F) rau samarium cobalt hlau nplaum thiab ferrites, thiab kwv yees li 140 degree (280 degree F) rau neodymium hlau nplaum thiab cov hlau nplaum mos. F), tab sis tus nqi tiag tiag tseem yuav txawv nyob ntawm cov khoom ntawm cov khoom.
Feem ntau ntawm cov ntaub ntawv siv los ua hlau nplaum conductors thiab electromagnets yog cov hlau nplaum mos. Lub polarity ntawm cov hlau nplaum ruaj khov tsis hloov pauv, qhov polarity ntawm cov hlau nplaum mos hloov nrog cov polarity ntawm cov hlau nplaum siv. Lawv ob leeg nyiam cov khoom ferrous, ib yam khoom uas peb hu ua magnetism.
