Sib nqus homSuper Strong Magnets: Thaum tsis muaj ib qho chaw sib nqus sab nraud, vim muaj kev sib pauv ntawm cov hluav taws xob lossis lwm yam kev cuam tshuam ntawm cov atoms uas nyob ib sab hauv cov khoom sib nqus, lawv lub sijhawm sib nqus kov yeej cov kev cuam tshuam ntawm thermal motion, cov hlau nplaum muaj zog yog nyob rau hauv ib feem kev txiav txim, ua rau muaj qhov tshwm sim. ntawm magnetic moment.Thaum siv cov hlau nplaum sab nraud, nws cov hlau nplaum hloov pauv nrog cov hlau nplaum sab nraud zoo ib yam li cov ntaub ntawv ferromagnetic.Ferromagnetism thiab antiferromagnetism muaj tib lub cev, tab sis lub antiparallel spin magnetic moments nyob rau hauv ferromagnets muaj ntau qhov sib txawv, yog li muaj ib feem offset spontaneous magnetic moments, zoo ib yam li ferromagnet.Ferrites feem ntau yog ferromagnets.
Diamagnetism yog thaum lub sij hawm sib nqus ntawm electrons nyob rau hauv atoms ntawm ib yam khoom tshem tawm ib leeg tawm thiab lub sij hawm sib nqus sib nqus yog xoom.Tab sis thaum lubStrong Rare Earth Magnetsyog raug rau sab nraud magnetic teb, lub electron orbital motion yuav hloov, thiab tsim ib tug me me sib nqus lub sij hawm nyob rau hauv lub opposite kev taw qhia ntawm sab nraud magnetic teb.Cov hlau nplaum muaj zog yog li sawv cev rau cov khoom sib nqus ntawm ib yam khoom thiab qhov kev cuam tshuam tau dhau los ua tus lej tsis zoo.Sib nqus susceptibility yog qhov piv ntawm lub sij hawm sib nqus ntawm ib yam khoom nyob rau hauv ib qho chaw sib nqus sab nraud (hu ua magnetization) rau lub zog ntawm magnetic teb, nrog lub cim κ.Qhov susceptibility ntawm cov tshuaj antimagnetic dav dav yog hais txog rho tawm ib feem ntawm ib lab (-10-6).
Qhov sib nqus susceptibility ntawm paramagnetism yog qhov zoo, 1 ~ 3 magnitude loj dua diamagnetism, X yog hais txog 10-5 ~ 10-3, ua raws Curie txoj cai los yog Curie-Weiss txoj cai.Thaum muaj ions, atoms lossis molecules tsis muaj electron khub hauv aStrong Permanent Magnet, muaj spin angular momentum thiab orbital angular momentum ntawm electrons, yog li muaj spin magnetic moments thiab orbital magnetic moments.Nyob rau hauv sab nraud magnetic teb, tus thawj tsis meej lub sij hawm sib nqus yuav tsum oriented, yog li qhia paramagnetism.
Post lub sij hawm: Dec-12-2022