TY - GEN
T1 - Analysis of a Spin-Torque Oscillator Using Injection Locking to an External Microwave Field
AU - Suto, H.
AU - Asam, N.
AU - Tamaru, S.
AU - Sepehri-Amin, H.
AU - Bolyachkin, A.
AU - Zhou, W.
AU - Nakatani, T.
AU - Kubota, H.
AU - Sakuraba, Y.
N1 - Funding Information:
This work is partially funded by the advanced storage research consortium (ASRC), Japan and JSPS KAKENHI Grant Numbers 17H06152 and 19K05257.
Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - A spin-torque oscillator (STO) is a key device in microwave-assisted magnetic recording (MAMR). Conventionally, the magnetization dynamics of STOs has been analyzed using the high-frequency electrical signal from the STO (STO signal). However, the STO signal is sometimes undetectable because of the highly symmetric magnetization trajectory or contains several frequency components that do not correspond to the frequency of the actual magnetization oscillation [1]. Furthermore, when the STO is integrated into the write head, the STO signal is expected to attenuate heavily in the write head, making it difficult to extract the STO signal. These facts prevent identifying the oscillation frequency from the STO signal, and a new analysis method of the STO that does not rely on the STO signal is required.
AB - A spin-torque oscillator (STO) is a key device in microwave-assisted magnetic recording (MAMR). Conventionally, the magnetization dynamics of STOs has been analyzed using the high-frequency electrical signal from the STO (STO signal). However, the STO signal is sometimes undetectable because of the highly symmetric magnetization trajectory or contains several frequency components that do not correspond to the frequency of the actual magnetization oscillation [1]. Furthermore, when the STO is integrated into the write head, the STO signal is expected to attenuate heavily in the write head, making it difficult to extract the STO signal. These facts prevent identifying the oscillation frequency from the STO signal, and a new analysis method of the STO that does not rely on the STO signal is required.
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U2 - 10.1109/TMRC53175.2021.9605131
DO - 10.1109/TMRC53175.2021.9605131
M3 - Conference contribution
AN - SCOPUS:85123482862
T3 - 32nd Magnetic Recording Conference, TMRC 2021
BT - 32nd Magnetic Recording Conference, TMRC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 32nd Magnetic Recording Conference, TMRC 2021
Y2 - 16 August 2021 through 19 August 2021
ER -