The magnetic interactions between bcc Fe nanocrystalline particles in (formula presented) nanocrystalline soft magnetic alloys are in situ studied by electron holography. Wavy lines of magnetic flux inside magnetic domains reveal local magnetization fluctuations of magnetic ripple structure, which result from the interplay between the exchange and magnetostatic interactions. The longitudinal wavelength decreases with an increase in temperature. It is found that the local stray field greatly weakens the intergranular exchange coupling and reduces the coupled volume at elevated temperatures. The thermal magnetic behaviors of nanocrystalline soft magnetic alloys are explained.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2003 May 29|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics