TY - JOUR
T1 - Study on the trapping of domain wall in an Ni-Fe nanowire with a constricted area
AU - Endo, Yasushi
AU - Mitsuzuka, Yoshio
AU - Yamaguchi, Masahiro
N1 - Funding Information:
ACKNOWLEDGMENT The authors would like to thank Prof. Sugimoto and Associate Prof. Tezuka of the Department of Metallurgy, Materials Science, and Materials Processing, Graduate School of Engineering, Tohoku University for performing the e-beam lithography. This work was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan, and by Special Coordination Funds for Promoting Science and Technology from the Formation of Innovation Center for Fusion of Advanced Technologies and in part by the Strategic Information and Communications R&D Promotion Programme (SCOPE) from the Ministry of Internal Affairs and Communications (MIC); and in part by Priority Assistance for the Formation of Worldwide Renowned Centers of Research—The Global COE Program (Project: Center of Education and Research for Information Electrics Systems) of MEXT, Japan.
PY - 2010/6
Y1 - 2010/6
N2 - This paper reports the study on magnetization reversal in a 10-nm-thick Ni-Fe nanowire with a constricted area in order to understand the domain wall trapping in the nanowire. The micromagnetics simulation indicates that the shape of the hysteresis loop in the nanowire is stepped square. It also shows that the domain wall moves from the edge of a notch connected to the wider nanowire and is partly pinned at the most constricted portion of the nanowire, and further annhilates as the magnetic field is varied from positive to negative or vice-versa. The magnetic-field sweeping magnetic-force microscopy measurements verified these predictions at various points within the nanowire by means of the phase (the stray field) versus magnetic-field curves. On the basis of these results, it is evident that a dominant factor in the magnetization reversal of the nanowire is mainly the domain wall motion within the nanowire, and that the domain wall is trapped in the constricted area because of the difference of coercivity between the narrower and wider nanowires.
AB - This paper reports the study on magnetization reversal in a 10-nm-thick Ni-Fe nanowire with a constricted area in order to understand the domain wall trapping in the nanowire. The micromagnetics simulation indicates that the shape of the hysteresis loop in the nanowire is stepped square. It also shows that the domain wall moves from the edge of a notch connected to the wider nanowire and is partly pinned at the most constricted portion of the nanowire, and further annhilates as the magnetic field is varied from positive to negative or vice-versa. The magnetic-field sweeping magnetic-force microscopy measurements verified these predictions at various points within the nanowire by means of the phase (the stray field) versus magnetic-field curves. On the basis of these results, it is evident that a dominant factor in the magnetization reversal of the nanowire is mainly the domain wall motion within the nanowire, and that the domain wall is trapped in the constricted area because of the difference of coercivity between the narrower and wider nanowires.
KW - Domain wall motion
KW - Domain wall trapping
KW - Magnetization reversal
KW - Ni-Fe nanowire with a constricted area
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U2 - 10.1109/TMAG.2010.2043649
DO - 10.1109/TMAG.2010.2043649
M3 - Article
AN - SCOPUS:77952807009
VL - 46
SP - 2413
EP - 2416
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 6
M1 - 5467602
ER -