TY - JOUR
T1 - In-situ Lorentz microscopy of Fe85Si2B8P4Cu1 nanocrystalline soft magnetic alloys
AU - Akase, Zentaro
AU - Aizawa, Shinji
AU - Shindo, Daisuke
AU - Sharma, Parmanand
AU - Makino, Akihiro
N1 - Funding Information:
We would like to thank Dr. Y. A. Ono for critical reading of the manuscript and for comments and suggestions. This work was supported by the “Tohoku Innovative Materials Technology Initiatives for Reconstruction (TIMT)” funded by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) and Reconstruction Agency, Japan. This research was partly supported by the grant from the Japan Society for the Promotion of Science (JSPS) through the ‘“Funding Program for World-Leading innovative R&D on Science and Technology (FIRST program)” initiated by the Council for Science and Technology Policy (CSTP) .
Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.
PY - 2015/2/1
Y1 - 2015/2/1
N2 - Microstructure dependence of magnetic properties of soft magnetic Fe-Si-B-P-Cu nanocrystalline alloys were studied by using in-situ Lorentz microscopy in a transmission electron microscope equipped with a magnetizing system. In particular, we investigated in detail motion of magnetic domain walls in heat-treated Fe85Si12B6P4Cu1 amorphous ribbons. Smooth motion of domain walls was observed for the optimally heat-treated (at 430 °C) nano-crystalline alloy. Pinning of domain walls was observed for higher-temperature-heat-treated (470°C) ribbons. Both ribbons showed a nanocrystalline structure containing α-Fe crystallites of about 15 nm in size. Electron diffraction patterns indicated that the higher-temperature-heat-treated samples contained boride precipitates, which is considered to cause less smooth domain wall motion.
AB - Microstructure dependence of magnetic properties of soft magnetic Fe-Si-B-P-Cu nanocrystalline alloys were studied by using in-situ Lorentz microscopy in a transmission electron microscope equipped with a magnetizing system. In particular, we investigated in detail motion of magnetic domain walls in heat-treated Fe85Si12B6P4Cu1 amorphous ribbons. Smooth motion of domain walls was observed for the optimally heat-treated (at 430 °C) nano-crystalline alloy. Pinning of domain walls was observed for higher-temperature-heat-treated (470°C) ribbons. Both ribbons showed a nanocrystalline structure containing α-Fe crystallites of about 15 nm in size. Electron diffraction patterns indicated that the higher-temperature-heat-treated samples contained boride precipitates, which is considered to cause less smooth domain wall motion.
KW - Lorentz microscopy
KW - Magnetic domain-wall motion
KW - Nanocrystalline soft magnetic alloy
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U2 - 10.1016/j.jmmm.2014.08.101
DO - 10.1016/j.jmmm.2014.08.101
M3 - Article
AN - SCOPUS:84908181394
SN - 0304-8853
VL - 375
SP - 10
EP - 14
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
ER -