1. Direct observation of magnetization reversal in thin Nd2Fe14B film.
- Author
-
Park, H. S., Park, Y.-G., Gao, Y., Shindo, D., and Inoue, M.
- Subjects
THIN films ,MAGNETIC fields ,MAGNETIZATION ,FERROMAGNETISM ,ELECTRON microscopes ,COMPASS (Orienteering & navigation) - Abstract
By utilizing a sharp magnetic needle made of a sintered Nd
2 Fe14 B permanent magnet, we were able to produce a strong magnetic field of up to approximately 560 kA/m in a transmission electron microscope and succeeded in observing the magnetization reversal in a thin film of sintered Nd2 Fe14 B by in situ Lorentz microscopy. The increase in the magnetic field induced by the magnetic needle led to a pair of straight magnetic domain walls forming abruptly from the grain boundary. The successive nucleation in the neighboring grain started at the grain boundary adjacent to the magnetic domain wall formed first. Eventually, the magnetic domain walls in the neighboring grains connected and moved continuously and finally disappeared. [ABSTRACT FROM AUTHOR]- Published
- 2005
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