Magnetic domain structures of Sr3Co2Z hexaferrite by TEM

Abstract The magnetic domain structure of Sr3Co2Z hexaferrite related to crystal orientation is investigated by Lorentz microscopy and electron holography. The sample of Sr3Co2Z, prepared by citrate method, was milled in two different crystallographic orientations by focused ion beam. One of them was prepared with its c crystallographic axis direction parallel to the electron beam at the TEM, and the other one, perpendicular to this direction. In both specimens, Lorentz micrographs revealed some structure domain walls e.g. stripes and magnetic flux-closure. Furthermore, phase micrographs acquired by electron holography revealed magnetic domain structures with 145.3°±5.2° domain walls.