TY - JOUR
T1 - Local probing of magnetization reversal in Ni-Fe elliptical dots with variable geometry
AU - Endo, Y.
AU - Fujimoto, H.
AU - Nakatani, R.
AU - Yamamoto, M.
N1 - Funding Information:
This work was supported in part by a Grant-in-Aid for Scientific Research (S), Exploratory Research and Encouragement of Young Scientists (B) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. This work was also supported in part by Priority Assistance for the Formation of Worldwide Renowned Centers of Research—The Global COE Program under Project: Center of Excellence for Advanced Structural and Functional Materials Design, MEXT, Japan. This work was also supported in part by the Strategic Information and Communications R&D Promotion Programme (SCOPE), Ministry of Internal Affairs and Communications (MIC). The first author would like to thank Prof. Yamaguchi of Tohoku University for effective discussions.
PY - 2008/11
Y1 - 2008/11
N2 - We have investigated the detailed magnetization reversal in 10-nm-thick Ni-Fe elliptical dots with several dot sizes using magnetic field sweeping (MFS)-magnetic force microscopy (MFM). At the dot edges, the shape of the phase (the stray field) curve versus magnetic field changes from a stepped hysteresis loop to a almost nonstepped hysteresis loop with increasing dot size. On the other hand, at the center within the dot, sharp or weak decreases in phase are observed as the magnetic field is varied. From these results, it is found that, in the magnetization reversal of a 10-nm-thick Ni-Fe elliptical dot with several dot sizes, the dominant factor changes from the change in the magnetic domain configuration to the domain wall motion as the length of major axis increases.
AB - We have investigated the detailed magnetization reversal in 10-nm-thick Ni-Fe elliptical dots with several dot sizes using magnetic field sweeping (MFS)-magnetic force microscopy (MFM). At the dot edges, the shape of the phase (the stray field) curve versus magnetic field changes from a stepped hysteresis loop to a almost nonstepped hysteresis loop with increasing dot size. On the other hand, at the center within the dot, sharp or weak decreases in phase are observed as the magnetic field is varied. From these results, it is found that, in the magnetization reversal of a 10-nm-thick Ni-Fe elliptical dot with several dot sizes, the dominant factor changes from the change in the magnetic domain configuration to the domain wall motion as the length of major axis increases.
KW - Magnetic elliptical dot
KW - Magnetic force microscopy (MFM)
KW - Magnetization reversal
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U2 - 10.1109/TMAG.2008.2001620
DO - 10.1109/TMAG.2008.2001620
M3 - Article
AN - SCOPUS:77955113866
SN - 0018-9464
VL - 44
SP - 3244
EP - 3247
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 11 PART 2
ER -