TY - JOUR
T1 - Observation of microstructures and magnetic domains of Sm-Co based permanent magnets by high-voltage electron microscopy
AU - Yang, Jun Mo
AU - Shindo, Daisuke
AU - Hiroyoshi, Hidetoshi
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1997/4
Y1 - 1997/4
N2 - Microstructures and magnetic domains of precipitation hardened Sm(Co0.653Fe0.257Cu0.066Zr 0.024)7.3 permanent magnets were investigated using a high-voltage electron microscope. The cellular microstructures controlled by step aging were clearly observed on atomic scale by high-voltage HREM. It was found that the cell interior phases of as-sintered magnets contained microtwins but those of step aged magnets contained the Z phase on the basal plane with disappearance of the twins. Also, Lorentz electron microscope images showed that the domain wall pinning at the cell boundary phases of the SmCo5 structure was increased by the step aging. Furthermore, the intensity distributions of Lorentz electron microscope images obtained by imaging plates were compared with the calculated intensity distribution, and the domain wall width was evaluated to be 10 nm.
AB - Microstructures and magnetic domains of precipitation hardened Sm(Co0.653Fe0.257Cu0.066Zr 0.024)7.3 permanent magnets were investigated using a high-voltage electron microscope. The cellular microstructures controlled by step aging were clearly observed on atomic scale by high-voltage HREM. It was found that the cell interior phases of as-sintered magnets contained microtwins but those of step aged magnets contained the Z phase on the basal plane with disappearance of the twins. Also, Lorentz electron microscope images showed that the domain wall pinning at the cell boundary phases of the SmCo5 structure was increased by the step aging. Furthermore, the intensity distributions of Lorentz electron microscope images obtained by imaging plates were compared with the calculated intensity distribution, and the domain wall width was evaluated to be 10 nm.
KW - High-voltage electron microscopy
KW - Imaging plate
KW - Intensity distribution
KW - Lorentz electron microscopy
KW - Microtwin
KW - Samarium(cobalt, iron, copper, zirconium) permanent magnet
KW - Z phase
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U2 - 10.2320/matertrans1989.38.363
DO - 10.2320/matertrans1989.38.363
M3 - Article
AN - SCOPUS:0031117317
VL - 38
SP - 363
EP - 366
JO - Materials Transactions
JF - Materials Transactions
SN - 1345-9678
IS - 4
ER -