Cov hlau nplaum ib leeg xa mus rau ib sab nrog cov hlau nplaum muaj zog dua thiab lwm sab nrog cov hlau nplaum tsis muaj zog, thiab sab nrog cov hlau nplaum tsis muaj zog yog ua los ntawm qee cov ntaub ntawv tshwj xeeb, xws li galvanized hlau ntawv tom qab kev kho tshwj xeeb, nws cov hlau nplaum ntawm sab no yuav yog. thaiv los ntawm galvanized hlau ntawv, Tom qab ntawd nws yog reflected mus rau sab nraud, uas yog sab nrog cov hlau nplaum muaj zog (cov ntawv hlau galvanized ntawm no yog sib npaug rau daim iav, xav txog lub hnub ci rov qab), kom cov hlau nplaum ntawm lwm sab muaj zog.
Vim tias cov hlau nplaum tub yees yog ib hom hlau nplaum tshwj xeeb hu ua Halbach Array. Los ntawm kev npaj cov hlau nplaum nyob rau hauv no txoj kev, raws li qhia nyob rau hauv daim duab hauv qab no, koj muaj peev xwm muaj ib tug muaj zog array ntawm ib sab ntawm lub magnetic teb thiab ib tug zero array nyob rau sab nraud.
Nyob rau hauv txoj kev no, txawm hais tias cov hlau nplaum roj hmab (composite ntawm bonded ferrite magnetic hmoov thiab hluavtaws roj hmab) siv nyob rau hauv lub tub yees hlau nplaum yog tsis muaj zog heev, nws yog hais txog ob mus rau peb feem pua ntawm NdFeB, tab sis cov hlau nplaum nyob rau sab nraum qab, uas yog, sab. txuas rau lub tub yees, tseem tuaj yeem txhim kho zoo heev.
Cov qauv no tau pom thawj zaug hauv xyoo 1973 los ntawm Asmeskas tus kws tshawb fawb Mallianson hauv kev sib sau ua ke ntawm cov qauv hlau nplaum ruaj khov, thiab muab nws lub npe hu ua "Magnetic Curiosity", tab sis nws yog ib qho kev txaj muag uas nws lub peev xwm ntawm cov qauv no tsis paub txog. Tom qab ntawd, xyoo 1979, tus kws tshawb fawb Asmeskas Klaus Halbach tau tshawb pom qhov tshwj xeeb cov hlau nplaum ruaj khov no thaum nws tab tom kawm electron acceleration ntawm Lawrence Berkeley National Laboratory. Los ntawm maj mam txhim kho cov qauv, qhov thiaj li hu ua "Halbach" hlau nplaum thaum kawg tsim. Ntxiv rau cov hlau nplaum tub yees, Halbach arrays kuj tseem siv rau hauv brushless DC motors, particle accelerators, dawb electron lasers, thiab maglev tsheb ciav hlau lem.