Neodymium cov hlau nplaum tau pom tias muaj zog vim lawv tawm tsam demagnetization thiab muaj lub siab khaus magnetization. Qhov kev magnetization ntawm saturation muaj feem xyuam mus rau lub zog sib nqus khoom ib qho khoom uas yuav khaws cia, yog li nws yog ib qho qhia txog lub cev rub lub dag lub zog ua tiav.
Ib qho neodymium hlau nplaum yog ib qho kev sib txhuam ntawm neodymium, hlau, thiab boron uas ua ib lub qauv ntawm crystalline nrog formula Nd2Fe14B. Ferromagnetic cov ntaub ntawv zoo li neodymium cov hlau nplaum muaj li thaj tsam me me uas hu ua magnetic domains uas nyob rau tib qho kev taw qhia thaum pom ib qho chaw sib nqus sab nraud. Thaum twg tag nrho cov puav cov hlua, cov khoom ntawd yog nyob hauv nws txoj kev magnetization. Ntawm qhov kev taw qhia no, ib qho neodymium magnet muaj ib qho kev sib zog ua zog tshaj li lwm cov hlau nplaum.
Lub symmetry ntawm lub atoms nyob rau hauv tetragonal Nd2Fe14B crystalline qauv ua li cas yog hu ua siab uniaxial magnetocrystalline anisotropy. Qhov no txhais tau hais tias cov muaju muaj ib qhov axis uas tsis tas yuav tsum muaj zog npaum li cas kom khwv tau, yog li yog cov nplais ua tau rau ib thaj chaw muaj dag zog, lawv yuav taw tes rau tib txoj kev los ntawm lawv qhov "yooj yim" txoj kab ntawm magnetization. Thaum siv lead ua ib qho yooj yim ntawm cov txuj ci magnetization, lub coercivity, los yog ua haujlwm rau kev siv tsis tau, ntawm cov khoom nce vim hais tias ntau lub zog yuav tsum tau hloov cov kev taw qhia ntawm cov txuj ci magnetization.