Micromagnetic model analysis of integrated single-pole-type head with tilted spin-torque oscillator for high-frequency microwave-assisted magnetic recording

Journal Article · Thu May 07 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4907328· OSTI ID:22410011

Katayama, Takuto; Kanai, Yasushi ^[1]; Yoshida, Kazuetsu ^[2]; Greaves, Simon; Muraoka, Hiroaki ^[3]

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1. Department of Information and Electronics Engineering, Niigata Institute of Technology, Kashiwazaki, Niigata 945-1195 (Japan)
2. Department of Information and Communication Engineering, Kogakuin University, Shinjuku-ku, Tokyo 163-8622 (Japan)
3. Research Institute of Electrical Communication, Tohoku University, Sendai, Miyagi 980-8577 (Japan)

The spin-torque oscillator (STO) is the most important component in microwave-assisted magnetic recording. Some requirements for the STO are: large amplitude and stable oscillation, small injected current, and oscillation at a frequency that excites resonance in a recording medium. It is also necessary for the STO oscillation to closely follow the head coil current. In this paper, STOs were integrated into write heads and micromagnetic analyses carried out to obtain a write head structure with stable STO oscillation that could follow a high-frequency head coil current.

• OSTI ID: 22410011
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRIC CURRENTS
MAGNET COILS
MAGNETIC CORES
MAGNETIC MATERIALS
MAGNETIZATION
MICROWAVE RADIATION
OSCILLATIONS
OSCILLATORS
RESONANCE
SPIN
TORQUE