Halbach array bụ ihe ndọta, nke bụ ihe owuwu kacha mma na injinia. Ebumnuche bụ imepụta oghere ndọta kachasi ike yana ọnụ ọgụgụ kacha nta nke magnet. N'afọ 1979, mgbe Klaus Halbach, bụ ọkà mmụta America, mere nnwale electron acceleration, ọ chọtara ihe ndọta a pụrụ iche na-adịgide adịgide, jiri nwayọọ nwayọọ mee ka usoro a dịkwuo mma, ma mesịa guzobe ihe a na-akpọ "Halbach".