Effect of Magnetostatic Interactions between the Spin-Torque Oscillator and the SPT Writer on the Oscillation Characteristics of the Spin-Torque Oscillator
Summary :
Microwave-assisted magnetic recording (MAMR) has been proposed as a candidate technology to realize areal recording densities of over 2 Tbit/inch2. MAMR requires a spin-torque oscillator (STO) to generate a strong high-frequency magnetic field that will induce magnetic resonance in the recording medium. The oscillation characteristics of STOs were previously investigated using a micromagnetic model that neglected the magnetic interaction among the STO, the single-pole-type (SPT) writer, and the recording head. The STO is typically placed in the gap between the main pole and the trailing shield of the SPT writer, so that the STO is inevitably subjected to strong magnetic interaction with the main pole and the trailing shield. We have developed a new simulator, referred to as an integrated MAMR simulator, that takes this interaction into account. The integrated simulator has revealed that the magnetic interaction has a strong influence on the oscillation characteristics.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E96-C No.12 pp.1484-1489
- Publication Date
- 2013/12/01
- Publicized
- Online ISSN
- 1745-1353
- DOI
- 10.1587/transele.E96.C.1484
- Type of Manuscript
- Special Section PAPER (Special Section on Advanced Elementary Technologies for Information Storage)
- Category
Authors
Sota ASAKA
Kogakuin University
Takuya HASHIMOTO
Kogakuin University
Kazuetsu YOSHIDA
Kogakuin University
Yasushi KANAI
Niigata Institute of Technology
Keyword
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Sota ASAKA, Takuya HASHIMOTO, Kazuetsu YOSHIDA, Yasushi KANAI, "Effect of Magnetostatic Interactions between the Spin-Torque Oscillator and the SPT Writer on the Oscillation Characteristics of the Spin-Torque Oscillator" in IEICE TRANSACTIONS on Electronics,
vol. E96-C, no. 12, pp. 1484-1489, December 2013, doi: 10.1587/transele.E96.C.1484.
Abstract: Microwave-assisted magnetic recording (MAMR) has been proposed as a candidate technology to realize areal recording densities of over 2 Tbit/inch2. MAMR requires a spin-torque oscillator (STO) to generate a strong high-frequency magnetic field that will induce magnetic resonance in the recording medium. The oscillation characteristics of STOs were previously investigated using a micromagnetic model that neglected the magnetic interaction among the STO, the single-pole-type (SPT) writer, and the recording head. The STO is typically placed in the gap between the main pole and the trailing shield of the SPT writer, so that the STO is inevitably subjected to strong magnetic interaction with the main pole and the trailing shield. We have developed a new simulator, referred to as an integrated MAMR simulator, that takes this interaction into account. The integrated simulator has revealed that the magnetic interaction has a strong influence on the oscillation characteristics.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E96.C.1484/_p
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@ARTICLE{e96-c_12_1484,
author={Sota ASAKA, Takuya HASHIMOTO, Kazuetsu YOSHIDA, Yasushi KANAI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Effect of Magnetostatic Interactions between the Spin-Torque Oscillator and the SPT Writer on the Oscillation Characteristics of the Spin-Torque Oscillator},
year={2013},
volume={E96-C},
number={12},
pages={1484-1489},
abstract={Microwave-assisted magnetic recording (MAMR) has been proposed as a candidate technology to realize areal recording densities of over 2 Tbit/inch2. MAMR requires a spin-torque oscillator (STO) to generate a strong high-frequency magnetic field that will induce magnetic resonance in the recording medium. The oscillation characteristics of STOs were previously investigated using a micromagnetic model that neglected the magnetic interaction among the STO, the single-pole-type (SPT) writer, and the recording head. The STO is typically placed in the gap between the main pole and the trailing shield of the SPT writer, so that the STO is inevitably subjected to strong magnetic interaction with the main pole and the trailing shield. We have developed a new simulator, referred to as an integrated MAMR simulator, that takes this interaction into account. The integrated simulator has revealed that the magnetic interaction has a strong influence on the oscillation characteristics.},
keywords={},
doi={10.1587/transele.E96.C.1484},
ISSN={1745-1353},
month={December},}
Copy
TY - JOUR
TI - Effect of Magnetostatic Interactions between the Spin-Torque Oscillator and the SPT Writer on the Oscillation Characteristics of the Spin-Torque Oscillator
T2 - IEICE TRANSACTIONS on Electronics
SP - 1484
EP - 1489
AU - Sota ASAKA
AU - Takuya HASHIMOTO
AU - Kazuetsu YOSHIDA
AU - Yasushi KANAI
PY - 2013
DO - 10.1587/transele.E96.C.1484
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E96-C
IS - 12
JA - IEICE TRANSACTIONS on Electronics
Y1 - December 2013
AB - Microwave-assisted magnetic recording (MAMR) has been proposed as a candidate technology to realize areal recording densities of over 2 Tbit/inch2. MAMR requires a spin-torque oscillator (STO) to generate a strong high-frequency magnetic field that will induce magnetic resonance in the recording medium. The oscillation characteristics of STOs were previously investigated using a micromagnetic model that neglected the magnetic interaction among the STO, the single-pole-type (SPT) writer, and the recording head. The STO is typically placed in the gap between the main pole and the trailing shield of the SPT writer, so that the STO is inevitably subjected to strong magnetic interaction with the main pole and the trailing shield. We have developed a new simulator, referred to as an integrated MAMR simulator, that takes this interaction into account. The integrated simulator has revealed that the magnetic interaction has a strong influence on the oscillation characteristics.
ER -
English
