TY - JOUR
T1 - Microwave-assisted magnetization reversal for granular media by a resonant cavity method
AU - Hinata, Shintaro
AU - Saito, Shin
AU - Takahashi, Migaku
AU - Sahashi, Masashi
N1 - Publisher Copyright:
© 2014 IEEE.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014/11/1
Y1 - 2014/11/1
N2 - Microwave-assisted magnetization reversal was verified by a cavity method with intention to apply homogenous microwave to a millimeter-size CoPTCr-SiO2 medium. By applying 34 GHz microwave with various power, magnetization reversal of the medium was assisted. The amount of the reversal magnetization was estimated using an internal magnetic field evaluated with ferromagnetic resonance (FMR) field. As a result, it is found that: 1) when the incident angle of external field is set at 90° (perpendicular), assisting effect depends on microwave power and magnetization of the media; 2) mode value of swiTChing field distribution of the media was reduced 300 Oe by 160-mW microwave assisting; and 3) when the incident angle of external field is set at 45° during the microwave assisting, dispersion of the SFD decreased with increasing microwave power.
AB - Microwave-assisted magnetization reversal was verified by a cavity method with intention to apply homogenous microwave to a millimeter-size CoPTCr-SiO2 medium. By applying 34 GHz microwave with various power, magnetization reversal of the medium was assisted. The amount of the reversal magnetization was estimated using an internal magnetic field evaluated with ferromagnetic resonance (FMR) field. As a result, it is found that: 1) when the incident angle of external field is set at 90° (perpendicular), assisting effect depends on microwave power and magnetization of the media; 2) mode value of swiTChing field distribution of the media was reduced 300 Oe by 160-mW microwave assisting; and 3) when the incident angle of external field is set at 45° during the microwave assisting, dispersion of the SFD decreased with increasing microwave power.
KW - Cavity method
KW - ferromagnetic resonance (FMR)
KW - microwave-assisted magnetization reversal
KW - perpendicular recording
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U2 - 10.1109/TMAG.2014.2322450
DO - 10.1109/TMAG.2014.2322450
M3 - Article
AN - SCOPUS:84915819010
VL - 50
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 11
M1 - 6971632
ER -