Lorentz TEM study of the magnetic microstructure in near-eutectoid Co-Pt alloys
作者： Isha Kashyap , Eric P. Vetter , Jerrold A. Floro , Marc De Graef
DOI: 10.1016/J.JMMM.2019.02.036
关键词:
摘要: Abstract In this paper, we report Lorentz Transmission Electron Microscopy (LTEM) observations of magnetic domain structures in a near-eutectoid Co 40 Pt 60 alloy. The crystallographic microstructure is characterized using conventional bright field/dark field TEM imaging. induction orientation inside domains extracted from Fresnel through-focus images by reconstructing the phase electron wave transport-of-intensity equation. alloy shows nano-chessboard pattern composed L10 tetragonal and L12 cubic phases. magnetization distribution four neighboring tiles structure found to follow vortex/anti-vortex configuration reduce magnetostatic magneto-crystalline anisotropy energies. An unconventional wall referred as an inter (IPMDW) observed at inter-phase boundaries Magnetic walls other microstructures (tweed microstructure, macro-twinned structure, coarsened plates) are also documented.
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