情報ストレージシステム研究室

 

電気通信研究所

    

論文

2022

3. S. J. Greaves, R. Itagaki and Y. Kanai, “Optimisation of soft layer uniaxial anisotropy gradient in media for microwave assisted magnetic recording”, IEEE Trans. Magn. 58(4), 3101309-1-9, (2022), https://doi.org/10.1109/TMAG.2021.3128644.

2. A. Sayyafan, A. Aboutaleb, B. Belzer, K. Sivakumar, S. Greaves and K. S. Chan, “Turbo-detection for multilayer magnetic recording using deep neural network-based equalizer and media noise predictor”, IEEE Trans. Magn. 58(4), 3200611-1-11, (2022), https://doi.org/10.1109/TMAG.2021.3122136.

1. S. J. Greaves, “Increasing the correlation time of spin-torque oscillators synchronised by magnetostatic interactions”, IEEE Trans. Magn. 58(2), 4100105-1-5, (2022), https://doi.org/10.1109/TMAG.2021.3079929.

 

2021

6. A. Aboutaleb, A. Sayyafan, K. Sivakumar, B. Belzer, S. Greaves, K. S. Chan and R. Wood, “A perspective on deep neural network-based detection for multilayer magnetic recording”, Appl. Phys. Lett. 119, 010502-1-11, (2021), https://doi.org/10.1063/5.0051085.

5. Y. Tanaka, “マルチスケールで見る研究と社会”, Magnetics Japan 16(4), p165-167, (2021).

4. A. Aboutaleb, A. Sayyafan, K. Sivakumar, B. Belzer, S. Greaves, K. S. Chan and R. Wood, “Deep neural network-based detection and partial response equalization for multilayer magnetic recording”, IEEE Trans. Magn. 57(3), 3101012-1-12, (2021), https://doi.org/10.1109/TMAG.2020.3038435.

3. S. J. Greaves, R. Itagaki and Y. Kanai, “Effect of FGL cone angle on recording performance in microwave-assisted magnetic recording”, IEEE Trans. Magn. 57(3), 3000306-1-6, (2021), https://doi.org/10.1109/TMAG.2020.3036382.

2. S. Honda, Y. Sonobe and S. J. Greaves, “Transforming domain motion for 3D racetrack memory with perpendicular magnetic anisotropy”, J. Phys. D. 54(13), 135002-1-7, (2021), https://doi.org/10.1088/1361-6463/abd060.

1. H. Yamane, S. J. Greaves and Y. Tanaka, “Heat-assisted magnetic recording on dual structure bit patterned media”, IEEE Trans. Magn. 57(2), 3200706-1-6, (2021), https://doi.org/10.1109/TMAG.2020.3020088.

 

2020

5. S. J. Greaves and Y. Kanai, “Optimisation of dual structure recording media for microwave-assisted magnetic recording”, AIP Advances 10, 125130-1-4, (2020), https://doi.org/10.1063/9.0000029.

4. S. Greaves, R. Itagaki and Y. Kanai, “Media design for microwave-assisted magnetic recording”, 電子情報通信学会技術研究報告 MRIS2020-9, p20-25, (2020).

3. W. Saito, S. Greaves and Y. Tanaka, “Investigation of selective dual-layer recording only using spin torque oscillator”, T. Magn. Soc. Jpn. 4, p1-4, (2020)

2. S. Greaves, “Microwave-assisted magnetic recording: Current status and outlook”, Magnetics Japan 15(2), p110-117, (2020).

1. Y. Tanaka and S. Greaves “Society 5.0を推進する情報ストレージの展望”, 電子情報通信学会技術研究報告 MRIS2019-48, p27-30, (2020).

 

2019

12. R. Itagaki, Y. Kanai and S. Greaves “Micromagnetic analysis of MAMR recording head – A consideration for stable oscillation of STO at low applied current density”, 電子情報通信学会技術研究報告 MRIS2019-41, p13-18, (2019).

11. S. J. Greaves and W. Saito, “Dual-structure microwave-assisted magnetic recording using only a spin torque oscillator”, AIP Advances 9, 125332-1-4, (2019), https://doi.org/10.1063/1.5129724.

10. S. J. Greaves, K. S. Chan and Y. Kanai, “Areal density capability of dual-structure media for microwave-assisted magnetic recording”, IEEE Transactions on Magnetics, 55(12), 6701509-1-9, (2019), https://doi.org/10.1109/TMAG.2019.2936579.

9. K. S. Chan, S. Greaves and S. Rahardja, “Optimization of the 3D MAMR stack”, IEEE Transactions on Magnetics 55(9), 7204905-1-5, (2019), https://doi.org/10.1109/TMAG.2019.2916748.

8. K. S. Chan, S. Greaves and S. Rahardja, “Techniques for addressing saddle points in the response surface methodology (RSM)”, IEEE Access 7, p85613-85621, (2019), https://doi.org/10.1109/ACCESS.2019.2922975.

7. S. J. Greaves, K. S. Chan and Y. Kanai, “Optmisation of dual structure recording media for microwave assisted magnetic recording”, IEEE Transactions on Magnetics 55(7), 3001305-1-5, (2019), https://doi.org/10.1109/TMAG.2018.2889317.

6. S. J. Greaves, R. Itagaki and Y. Kanai, “A model for predicting transition curvature in heat assisted magnetic recording”, IEEE Transactions on Magnetics 55(7), 3001506-1-6, (2019), https://doi.org/10.1109/TMAG.2018.2885990.

5. S. J. Greaves, K. S. Chan and Y. Kanai “Optimisation of dual layer recording media for microwave-assisted magnetic recording”, 電子情報通信学会技術研究報告 MRIS2019-5, p21-26, (2019).

4. R. Itagaki, Y. Kanai and S. Greaves, “Micromagnetic analysis of MAMR recording head - oscillation of STO with parallel head gap”, 電子情報通信学会技術研究報告 MRIS2019-4, p15-20, (2019).

3. Y. Kanai, R. Itagaki, S. J. Greaves and H. Muraoka, "Micromagnetic model simulations considering write head, spin-torque oscillator, and double-layered medium altogether", IEEE Transactions on Magnetics 55(3), 3000613-1-13, (2019), https://doi.org/10.1109/TMAG.2018.2869208.

2. S. J. Greaves and Y. Kanai, "Effect of spin torque oscillator tilt angle in microwave assisted magnetic recording", IEEE Transactions on Magnetics 55(3), 3000404-1-6, (2019), https://doi.org/10.1109/TMAG.2018.2868279.

1. Y. Kanai, R. Itagaki, S. Greaves and H. Muraoka, “Microwave model simulation of spin-torque oscillator and write head for microwave-assisted magnetic recording - spin injection layer with in-plane anisotropy”, ACES Journal 34(2), p226-227, (2019).

 

2018

10. S. J. Greaves, "Ultra-Fast Dynamics for Heat-Assisted Magnetic Recording", Handbook of Materials Modeling Volume 2: Applications: Current and Emerging Materials, editors W. Andreoni and S. Yip, Springer, Cham, (2018). https://doi.org/10.1007/978-3-319-50257-1_106-1, ISBN 978-3-319-50257-1.

9. R. Itagaki, Y. Kanai, S. Greaves and H. Muraoka, "Micromagnetic analysis of MAMR recording head – STO with parallel gap write head and the influence of recording layers on STO oscillation", 電子情報通信学会技術研究報告 MRIS2018-25, p41-46, (2018).

8. Y. Kanai, R. Itagaki, S. J. Greaves and H. Muraoka, "Micromagnetic model analysis of spin-torque oscillator (STO) integrated into recording head for microwave-assisted magnetic recording - oscillation of STO vs. rise time of in-gap field", IEEE Transactions on Magnetics 54(11), (2018), https://doi.org/10.1109/TMAG.2018.2848279.

7. S. J. Greaves, "Magnetic recording using a spin torque oscillator", IEEE Transactions on Magnetics 54(11), (2018), https://doi.org/10.1109/TMAG.2018.2834933.

6. S. J. Greaves, T. Kikuchi, Y. Kanai and H. Muraoka, "Optimizing dual-layer recording using antiferromagnetic exchange coupling", IEEE Transactions on Magnetics 54(11), (2018), https://doi.org/10.1109/TMAG.2018.2829509.

5. S. J. Greaves and Y. Kanai, "Effect of STO angle in microwave assisted magnetic recording", 電子情報通信学会技術研究報告 MRIS2018-4, p19-24, (2018).

4. R. Itagaki, Y. Kanai, S. Greaves and H. Muraoka, "Micromagnetic analysis of MAMR recording head - tilted STO with narrow gap write head", 電子情報通信学会技術研究報告 MRIS2018-5, p25-30, (2018).

3. T. Kikuchi, S. Greaves and H. Muraoka, "Effect of exchange coupling between top & bottom layers in dual layer microwave assisted magnetic recording", T. Magn. Soc. Jpn. 2, p1-4. (2018).

2. S. J. Greaves, Y. Kanai and H. Muraoka, "Antiferromagnetically coupled media for microwave-assisted magnetic recording", IEEE Transactions on Magnetics 54(2), 3000111-1-11, (2018), https://doi.org/10.1109/TMAG.2017.2730881.

1. S. J. Greaves, H. Muraoka and Y. Kanai, "Magnetisation switching of ECC grains in microwave-assisted magnetic recording", AIP Advances 8, 056502-1-7, (2018), https://doi.org/10.1063/1.5006362.

 

発表

2022

1. 10-14/1/2022: Joint MMM-Intermag conference, New Orleans, USA, paper IPA-04, “Optimising dual structure patterned media for heat assisted magnetic recording”, H. Yamane, S. J. Greaves and Y Tanaka.

 

2021

7. 10/12/2021: MR meeting, Online, “Effect of dot thickness and diameter in dual-structure heat-assisted magnetic recording on bit patterned media”, S. J. Greaves, H. Yamane and Y. Tanaka.

6. 31/8/2021: MSJ annual conference, Online, paper 31pC-9, “Dual FGL STO のマイクロマグ解析”, R. Itagaki, Y. Kanai and S. Greaves.

5. 31/8/2021: MSJ annual conference, Online, paper 31pC-7, “ビットパターンドメディアを用いた 3 次元熱アシスト磁気記録において記録ドットの体積が記録に及ぼす影響”, H. Yamane, S. J. Greaves and Y. Tanaka.

4. 19/8/2021: TMRC 2021, Online, paper G8, “STO oscillation dependence on in-gap field and main pole magnetization in MAMR”, R. Itagaki, Y. Kanai and S. J. Greaves.

3. 19/8/2021: TMRC 2021, Online, paper G4, “Turbo-detection for multilayer magnetic recording using deep neural network-based equalizer and media noise predictor”, A. Sayyafan, A. Aboutaleb, B. Belzer, K. Sivakumar and S. Greaves.

2. 18/8/2021: TMRC 2021, Online, paper F5 (invited), “Media optimisation for microwave-assisted magnetic recording”, S. J. Greaves, R. Itagaki and Y. Kanai.

1. 29/4/2021: Intermag 2021, Online, paper GP-03, “Increasing the correlation time of spin torque oscillators synchronised by magnetostatic interactions”, S. J. Greaves.

 

2020

5. 17/12/2020: MSJ annual conference, Online, paper 17aC-7, “Heat assisted magnetic recording on dual structure bit patterned media”, H. Yamane, S. J. Greaves and Y. Tanaka.

4. 3/12/2020: MR meeting, Online, “Media design for microwave assisted magnetic recording”, S. J. Greaves, R. Itagaki and Y. Kanai.

3. 5/11/2020: MMM 2020, Online, paper N3-02, “Optimisation of dual structure recording media for microwave-assisted magnetic recording”, S. Greaves and Y. Kanai.

2. 20/8/2020: TMRC 2020, Online, paper I3, “Effect of spin torque oscillator cone angle on recording performance in microwave assisted magnetic recording”, S. J. Greaves, R. Itagaki and Y. Kanai.

1. 19/8/2020: TMRC 2020, Online, paper E1 (invited), “Deep neural network-based detection and partial response equalization for multilayer magnetic recording”, A. Aboutaleb, A. Sayyafan, B. Belzer, K. Sivakumar, S. Greaves, K. S. Chan and R. Wood.

 

2019

9. 8/11/2019: MMM 2019, Las Vegas, USA, paper GR-08, “Stable oscillation of spin-torque oscillator with reduced injected current density for microwave-assisted magnetic recording”, Y. Kanai, R. Itagaki and S. J. Greaves.

8. 8/11/2019: MMM 2019, Las Vegas, USA, paper GR-06, “Dual-structure microwave-assisted magnetic recording using only a STO”, S. J. Greaves and W. Saito.

7. 27/10/2019: MSJ annual conference, Kyoto, Japan, paper 27pC-2, “Effect of magnetostatic interaction with MAMR head on STO oscillation”, R. Itagaki, Y. Kanai and S. J. Greaves.

6. 25/10/2019: MSJ annual conference, Kyoto, Japan, paper 25pPS-22, “Investigation of dual-layer selective recording using microwave assisted magnetic recording”, W. Saito, S. J. Greaves and Y. Tanaka.

5. 9/7/2019: TMRC 2019, Minneapolis, USA, paper C2, “The areal density capability of dual-structure media for microwave-assisted magnetic recording”, S. J. Greaves, K. S. Chan and Y. Kanai.

4. 13/6/2019: MR meeting, Sendai, Japan, “Optmisation of dual layer recording media for microwave-assisted magnetic recording”, S. J. Greaves, K. S. Chan and Y. Kanai.

3. 13/6/2019: MR meeting, Sendai, Japan, “Micromagnetic analysis of MAMR recording head - oscillation of STO with parallel head gap”, R. Itagaki, Y. Kanai and S. Greaves.

2. 17/1/2019: Joint MMM-Intermag Conference, Washington DC, USA, paper EK-08, "Correction of transition curvature for shingled, heat assisted magnetic recording", S. Greaves, R. Itagaki and Y. Kanai.

1. 17/1/2019: Joint MMM-Intermag Conference, Washington DC, USA, paper EK-07, "Optimisation of dual structure recording media for microwave assisted magnetic recording", S. Greaves, K. S. Chan and Y. Kanai.

 

2018

11. 7/12/2018: MR meeting, Ehime, Japan, "Micromagnetic analysis of MAMR recording head – STO with parallel gap write head and the influence of recording layers on STO oscillation", R. Itagaki, Y. Kanai, S. Greaves and H. Muraoka.

10. 16/11/2018: APMRC 2018, Shanghai, China, paper S08-A03, "Media optimization for 3D microwave-assisted magnetic recording via response surface methodology", K. S. Chan, S. Greaves and S. Rahardja.

9. 11/9/2018: MSJ Annual Conference, Tokyo, Japan, paper 11aC-3, "Microwave assisted magnetic recording on media with multiple recording structures", S. J. Greaves, Y. Kanai and H. Muraoka.

8. 9/8/2018: TMRC 2018, Milpitas, USA, paper C2, "Micromagnetic model simulations considering write head, spin-torque oscillator and double-layered medium altogether", Y. Kanai, R. Itagaki, S. J. Greaves and H. Muraoka.

7. 8/8/2018: TMRC 2018, Milpitas, USA, paper P1-7, "Effect of spin torque oscillator angle in microwave assisted magnetic recording", S. Greaves and Y. Kanai.

6. 7/6/2018: MR meeting, Sendai, Japan, "Micromagnetic analysis of MAMR recording head - tilted STO with narrow gap write head", R. Itagaki, Y. Kanai, S. Greaves and H. Muraoka.

5. 7/6/2018: MR meeting, Sendai, Japan, "Effect of STO angle in microwave assisted magnetic recording", S. J. Greaves and Y. Kanai.

4. 27/4/2018: Intermag 2018, Singapore, paper HV-13, "Optimising dual layer recording using antiferromagnetic exchange coupling", S. Greaves, T. Kikuchi, Y. Kanai and H. Muraoka.

3. 26/4/2018: Intermag 2018, Singapore, paper EU-04, "Numerical analysis of write current reduction in magnetic tri-layer structure with low-Tc interlayer for MRAM", Y. Kayama, K. Machida, S. Greaves, Y. Sonobe and Y. Nakatani.

2. 24/4/2018: Intermag 2018, Singapore, paper BQ-03, "Magnetic recording using a spin torque oscillator", S. Greaves.

1. 24/4/2018: Intermag 2018, Singapore, paper BQ-01, "Micromagnetic model analysis of spin-torque oscillator (STO) integrated into recording write head for microwave-assisted magnetic recording - Oscillation of STO vs. rise time of in-gap field", Y. Kanai, R. Itagaki, S. Greaves and H. Muraoka.