TY - JOUR
T1 - Magnetic-domain structure analysis of Nd-Fe-B sintered magnets using XMCD-PEEM technique
AU - Yamamoto, Sukeyoshi
AU - Yonemura, Mitsuharu
AU - Wakita, Takanori
AU - Fukumoto, Keiki
AU - Nakamura, Tetsuya
AU - Kinoshita, Toyohiko
AU - Watanabe, Yoshio
AU - Fang, Zhun Guo
AU - Sato, Masugu
AU - Terai, Tomoyuki
AU - Kakeshita, Tomoyuki
PY - 2008/10
Y1 - 2008/10
N2 - A combination of X-Ray Magnetic Circular Dichroism and PhotoEmission Electron Microscopy (XMCD-PEEM) was applied to the magnetic domain analysis of Nd-Fe-B sintered magnets. The XMCD-PEEM high-resolution images revealed both the magnetic domain structures and the microstructural morphologies. In the thermally demagnetized state, each grain in a polycrystalline sample exhibits a multi-domain structure, which is magnetically coupled across grain boundaries. After the DC field-demagnetization, it changed to a single domain structure. The magnetization vector in each surface grain reversed to the negative direction during the field-demagnetization procedure because of the small coercivity in the surface region. In the present study, we observed this surface domain reversal for the first time by means of XMCD-PEEM imaging method, which is important in order to understand the surface phenomena of Nd-Fe-B magnets.
AB - A combination of X-Ray Magnetic Circular Dichroism and PhotoEmission Electron Microscopy (XMCD-PEEM) was applied to the magnetic domain analysis of Nd-Fe-B sintered magnets. The XMCD-PEEM high-resolution images revealed both the magnetic domain structures and the microstructural morphologies. In the thermally demagnetized state, each grain in a polycrystalline sample exhibits a multi-domain structure, which is magnetically coupled across grain boundaries. After the DC field-demagnetization, it changed to a single domain structure. The magnetization vector in each surface grain reversed to the negative direction during the field-demagnetization procedure because of the small coercivity in the surface region. In the present study, we observed this surface domain reversal for the first time by means of XMCD-PEEM imaging method, which is important in order to understand the surface phenomena of Nd-Fe-B magnets.
KW - Magnet
KW - Magnetic-domain
KW - Neodymium-iron-boron
KW - Photoemission electron microscopy
KW - X-ray magnetic circular dichroism
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U2 - 10.2320/matertrans.MRA2008141
DO - 10.2320/matertrans.MRA2008141
M3 - Article
AN - SCOPUS:56649119167
SN - 1345-9678
VL - 49
SP - 2354
EP - 2359
JO - Materials Transactions
JF - Materials Transactions
IS - 10
ER -