TY - JOUR
T1 - Micromagnetic Model Simulations Considering Write Head, Spin-Torque Oscillator, and Double-Layered Medium Altogether
AU - Kanai, Yasushi
AU - Itagaki, Ryo
AU - Greaves, Simon J.
AU - Muraoka, Hiroaki
N1 - Funding Information:
ACKNOWLEDGMENT This work was supported in part by the Japan Society for the Promotion of Science KAKENHI under Grant 16K06321 and in part by the Advance Storage Research Consortium. The authors would like to thank the JSOL Corporation, Tokyo, Japan, for the software support.
Publisher Copyright:
© 1965-2012 IEEE.
PY - 2019/3
Y1 - 2019/3
N2 - Micromagnetic model simulations were performed to investigate spin-torque oscillators (STOs) integrated into the main pole-trailing shield (MP-TS) gap of the write head (integrated STO). First, the oscillation states of a tilted STO were investigated in a model comprising the write head, STO, and medium soft underlayer (SUL). We found that inserting the STO into a non-parallel MP-TS gap resulted in more stable oscillation. Second, we performed full micromagnetic simulations of the write head, STO, SUL, and recording layer (RL), and the oscillation of the tilted STO was investigated. We found that the RL affected the STO oscillation to some extent; however, the effect was smaller than that from the write head. We also discuss the calculation times for various structures with and without the RL, and with/without medium motion.
AB - Micromagnetic model simulations were performed to investigate spin-torque oscillators (STOs) integrated into the main pole-trailing shield (MP-TS) gap of the write head (integrated STO). First, the oscillation states of a tilted STO were investigated in a model comprising the write head, STO, and medium soft underlayer (SUL). We found that inserting the STO into a non-parallel MP-TS gap resulted in more stable oscillation. Second, we performed full micromagnetic simulations of the write head, STO, SUL, and recording layer (RL), and the oscillation of the tilted STO was investigated. We found that the RL affected the STO oscillation to some extent; however, the effect was smaller than that from the write head. We also discuss the calculation times for various structures with and without the RL, and with/without medium motion.
KW - Micromagnetic simulation
KW - microwave-assisted magnetic recording (MAMR)
KW - recording medium
KW - spin-torque oscillator (STO)
KW - write heads
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U2 - 10.1109/TMAG.2018.2869208
DO - 10.1109/TMAG.2018.2869208
M3 - Article
AN - SCOPUS:85054260227
SN - 0018-9464
VL - 55
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 3
M1 - 8472881
ER -