Scientific Papers

2023

1. 「Pulsed Hot Dense Oxygen Plasma Irradiation of Platinum for Improved Spin Hall Effect」S. Kumar, S. Manna, J. R. Mohan, U. Shashank, J. V. Vas, M. Mishra, S. Gupta, H. Asada, Y. Fukuma, R. S. Rawat, R. Medwal, SPIN online ready (2023).
2. 「Secondary Spin Current Driven Efficient THz Spintronic Emitters」P. Agarwal, Y. Yang, R. Medwal, H. Asada, Y. Fukuma, M. Battiato, R. Singh, Advanced Optical Materials, Vol. 11, 2301027 (2023).
3. 「Room-Temperature Charge-to-Spin Conversion from Quasi-2D Electron Gas at SrTiO3-Based Interfaces」U. Shashank, A. Deka, C. Yen, S. Gupta, R. Medwal, R. S. Rawat, H. Asada, X. R. Wang, Y. Fukuma, Physica Status Solidi-rapid research letters, 2200377 (2023).
4. 「Evaluation of memory capacity and time series prediction using a spin Hall oscillator as reservoir」A. J. Mathew, J. R. Mohan, R. Feng, R. Medwal, S. Gupta, R. S. Rawat, Y. Fukuma, IEEE Transactions on Magnetics, Vol. 59, 21300205 (2023).
5. 「Classification tasks using input driven nonlinear magnetization dynamics in spin Hall oscillator」J. R. Mohan, A. J. Mathew, K. Nishimura, R. Feng, R. Medwal, S. Gupta, R. S. Rawat, Y. Fukuma, Scientific Reports, Vol. 13, 7909 (2023).
6. 「Interfacial Origin of Unconventional Spin-Orbit Torque in Py/IrMn3」A. Kumar, P. Gupta, N. Chowdhury, K. I. A. Khan, U. Shashank, S. Gupta, Y. Fukuma, S. Chaudhary, P. K. Muduli, Advanced Quantum Technologies, Vol. 6, 2300092 (2023).
7. 「Ferromagnetic resonance excited by interfacial microwave electric field: the role of current-induced torques」A. Deka, B. Rana, Y. Otani, Y. Fukuma, Journal of Physics: Condensed Matter, Vol. 35, 214003 (2023).
8. 「Anisotropy-assisted bias-free spin Hall nano-oscillator」S. Manna, R. Medwal, S. Gupta, J. R. Mohan, Y. Fukuma, R. S. Rawat, Applied Physics Letters, Vol. 122, 072401 (2023).
9. 「Disentanglement of intrinsic and extrinsic side-jump scattering induced spin Hall effect in N-implanted Pt」U. Shashank, Y. Nakamura, Y. Kusaba, T. Tomoda, R. Nongjai, A. Kandasami, R. Medwal, R. S. Rawat, H. Asada, S. Gupta, Y. Fukuma, Physical Review B, Vol. 107, 064402 (2023).

2022

1. 「Room-Temperature Charge-to-Spin Conversion from Quasi-2D Electron Gas at SrTiO3-Based Interfaces」U. Shashank, A. Deka, C. Yen, S. Gupta, R. Medwal, R. S. Rawat, H. Asada, X. R. Wang, Y. Fukuma, Physica Status Solidi-rapid research letters, 2200377 (2022).
2. 「Piezoelectric Strain Control of Terahertz Spin Current」A. Chaurasiya, Z. Li, R. Medwal, S. Gupta, J. R. Mohan, Y. Fukuma, H. Asada, E. E. M. Chia, R. S. Rawat, Advanced Optical Materials, Vol. 10, 2201929 (2022).
3. 「Electric-field-induced parametric excitation of exchange magnons in a CoFeB/MgO junction」A. Deka, B. Rana, R. Anami, K. Miura, H. Takahashi, Y. Otan, Y. Fukuma, Physical Review Research, Vol. 4, 023139 (2022).

2021

1. 「Facet controlled anisotropic magnons in Y3Fe5O12 thin films」R. Medwal, A. Deka, J. V. Vas, M. Duchamp, H. Asada, S. Gupta, Y. Fukuma, R. S. Rawat, Applied Physics Letters, vol.119, 162403 (2021).
2. 「Challenges and applications to operando and in situ TEM imaging and spectroscopic capabilities in a cryogenic temperature range」E. Tyukalova, J. Vas, R. Ignatans, A. D. Mueller, R. Medwal, M. Imamura, H. Asada, Y. Fukuma, R. S. Rawat, V. Tileli, M. Duchamp, Accounts of Chemical Research, vol.54, 3125 (2021).
3. 「Investigation of structural, magnetic and electronic properties of FeTa films for varying Ta concentration at different temperatures」Y. Jafria, S. Singhc, S. Gupta, Y. Fukuma, K. Sharma, M. Gupta, V. R. Reddy, G. Sharma, A. Gupta, Journal of Magnetism and Magnetic Materials, vol.538, 168306 (2021).
4. 「Non-stoichiometric FePt nanoclusters for Heated Dot Magnetic Recording Media」J. R. Mohan, R. Medwal, S. Gupta, K. Gogia, J. V. Vas, R. Gupta, A. Deka, R. S. Rawat, S. Annapoorni, Y. Fukuma, ACS Applied Nano Materials, vol.4, 7079 (2021).
5. 「Highly dose dependent damping-like spin-orbit torque efficiency in O-implanted Pt」U. Shashank, R. Medwal, Y. Nakamura, J. R. Mohan, R. Nongjai, K. Asokan, R. S. Rawat, H. Asada, S. Gupta, Y. Fukuma, Applied Physics Letters, vol.118, 252406 (2021).
6. 「Pinning-assisted outplane anisotropy in reverse stack FeCo/FePt intermetallic bilayers for controlled switching in spintronics」G. Vashisht, U. Shashank, S. Gupta, R. Medwal, C. L. Dong, C. L. Chen, K. Asokan, Y. Fukuma, S. Annapoorni, Journal of Alloys and Compounds, vol.877, 160249 (2021).
7. 「Ultrafast Photo-Thermal Switching of Terahertz Spin Currents」P. Agarwal, R. Medwal, A. Kumar, H. Asada, Y. Fukuma, R. S. Rawat, M. Battiato, R. Singh, Advanced Functional Materials, vol.31, 2010453 (2021).
8. 「Enhanced Spin Hall Effect in S‐Implanted Pt」U. Shashank, R. Medwal, T.Shibata, R. Nongjai, J. V. Vas, M.Duchamp K. Asokan, R. S. Rawat. H. Asada, S. Gupta, Y. Fukuma, Advanced Quantum Technologies, vol.4, 2000112 (2021).

2020

1. 「Magnetoimpedance of epitaxial Y3Fe5O12 (001) thin film in low frequency regime」R. Medwal, U. Chaudhuri, J. V. Vas, A. Deka, S. Gupta, M. Duchamp, H. Asada, Y. Fukuma, R. Mahendiran, R. S. Rawat, ACS Applied Materials ＆ interfaces, Vol. 12, 41802 (2020).
2. 「Electric-field control of interfacial in-plane magnetic anisotropy in CoFeB/MgO junctions」A. Deka, B. Rana, R. Anami, K. Miura, H. Takahashi, Y. Otani, Y. Fukuma, Physical Review B, Vol. 101, 174405 (2020).
3. 「Modulation of Magnetization Precession Trajectories by Perpendicular Magnetic Anisotropy in CoFeB Thin Films」A. Deka, I. Tanaka, J. R. Mohan, Y. Fukuma, IEEE Transactions on Magnetics, Vol. 56, 4300205 (2020).
4. 「Simulations on the Effect of Magnetic Anisotropy on Switching of an Easy Cone Magnetized Free Layer」A. Deka, K. Sato, I. Tanaka, Y. Fukuma, IEEE Transactions on Magnetics, Vol. 56, 6702404 (2020).
   

2019

1. 「Spin seebeck effect in Neodymium Iron Garnet Multilayers」S. Tyagi, T. Maeda, K. Kimura, S. Gupta, K. Kishimoto, T. Koyanagi, H. Asada, Y. Fukuma, Sensors and Materials, Vol. 31, 2541 (2019).
2. 「Spin pumping in asymmetric Fe50Pt50/Cu/Fe20Ni80 trilayer structure」R. Medwal, S. Gupta, R. S. Rawat, A. Subramanian, Y. Fukuma, Physica Status Solidi-Rapid Research Letters, Vol. 13, 1900267 (2019).

2017

1. 「Voltage-induced magnetization dynamics in CoFeB/MgO/CoFeB magnetic tunnel junctions」K. Miura, S. Yabuuchi, M. Yamada, M. Ichimura, B. Rana, S. Ogawa, H. Takahashi, Y. Fukuma, Y. Otani, Scientific Reports, Vol. 7, 42511 (2017).
2. 「Important role of magnetization precession angle measurment in inverse spin Hall effect induced by spin pumping」S. Gupta, R. Medwal, D. Kodama, K. Kondou, Y. Otani, Y. Fukuma, Applied Physics Letters, Vol. 110, 022404 (2017).
3. 「Effect of excitation power on voltage induced local magnetization dynamics in an ultrathin CoFeB film」B. Rana, Y. Fukuma, K. Miura, H. Takahashi, Y. Otani, Scientific Reports, Vol. 7, 2318 (2017).
4. 「Excitation of coherent propagating spin waves in ultrathin CoFeB film by voltage-controlled magnetic anisotropy」B. Rana, Y. Fukuma, K. Miura, H. Takahashi, Y. Otani, Applied Physics Letters, Vol. 111, 052404 (2017).

2016

1. 「Fermi-level-dependent charge-to-spin current conversion by Dirac surface states of topological insulators」K. Kondou, R. Yoshimi, A. Tsukazaki, Y. Fukuma, J. Matsuno, K. S. Takahashi, M. Kawasaki, Y. Tokura, Y. Otani, Nature Physics, Vol. 12, 1027 (2016).
2. 「Epitaxial growth of diluted magnetic semiconductor GeCrTe with high Cr composition」Y. Fukuma, H. Asada, S. Senba, T. Koyanagi, Applied Physics Letters, Vol. 108, 222403 (2016).

2015

1. 「Spin relaxation characteristics in Ag nanowire covered with various oxides」S. Karube, H. Idzuchi, K. Kondou, Y. Fukuma, Y. Otani, Applied Physics Letters, Vol. 107, 122406 (2015).
2. 「Spin transport in non-magnetic nano-structure induced by non-local spin injection」H. Idzuchi, Y. Fukuma, Y. Otani, Physica E, Vol. 68, 239 (2015).

2014

1. 「Critical exponents and domain structures of magnetic semiconductor EuS and Gd-doped EuS films near Curie temperature」H. Idzuchi, Y. Fukuma, H. S. Park, T. Matsuda, T. Tanigaki, S. Aizawa, M. Shirai, D. Shindo, Y. Otani, Applied Physics Express, Vol. 7, 113002 (2014).
2. 「Effect of anisotropic spin absorption on the Hanle effect in lateral spin valves」H. Idzuchi, Y. Fukuma, S. Takahashi, S. Maekawa, Y. Otani, Physical Review B (Rapid Communication), Vol. 89, 81308 (2014).
3. 「Detection of a symmetric circular gyration of the vortex core via the second-order harmonic magnetoresistance oscillation」S. Sugimoto, N. Hasegawa, Y. Niimi, Y. Fukuma, S. Kasai, Y. Otani, Applied Physics Express, Vol. 7, 023006 (2014).

2013

1. 「5d iridium oxide as a material for spin-current detection」K. Fujiwara, Y. Fukuma, J. Matsuno, H. Idzuchi, Y. Niimi, Y. Otani, H. Takagi, Nature Communications, Vol. 4, 2893 (2013).
2. 「Tunable Magnonic Spectra in Two-Dimensional Magnonic Crystals with Variable Lattice Symmetry」S. Saha, R. Mandal, S. Barman, D. Kumar, B. Rana, Y. Fukuma, S. Sugimoto, Y. Otani, A. Barman, Advanced Functional Materials, Vol. 23, 2378 (2013).
3. 「Configurational anisotropic spin waves in cross-shaped Ni80Fe20 nanoelements」B. K. Mahato, B. Rana, R. Mandal, D. Kumar, S. Barman, Y. Fukuma, Y. Otani, A. Barman, Applied Physics Letters, Vol. 102, 192402 (2013).
4. 「Impact of interface properties on spin accumulation in dual-injection lateral spin valves」H. Idzuchi, S. Karube, Y. Fukuma, T. Aoki, Y. Otani, Applied Physics Letters, Vol. 103, 162403 (2013).
5. 「Spin injection properties in trilayer graphene lateral spin valves」Y. P. Liu, H. Idzuchi, Y. Fukuma, O. Rousseau, Y. Otani, W. S. Lew, Applied Physics Letters, Vol. 102, 033105 (2013).

2012

1. 「Towards coherent spin precession in pure-spin current」H. Idzuchi, Y. Fukuma, Y. Otani, Scientific Reports, Vol. 2, 628 (2012).
2. 「Spin relaxation mechanism in silver nanowires covered with MgO protection layer」H. Idzuchi, Y. Fukuma, L. Wang, Y. Otani, Applied Physics Letters, Vol. 101, 022415 (2012).
3. 「Optically Induced Tunable Magnetization Dynamics in Nanoscale Co Antidot LatticesR. Mandal, S. Saha, D. Kumar, S. Barman, S. Pal, K. Das, A. Raychaudhuri, Y. Fukuma, Y. Otani, A. Barman, ACS NANO, Vol. 6, 3397 (2012).
4. 「Temperature evolution of spin-polarized electron tunneling in Silicon nanowire-Permalloy lateral spin valve system」J. Tarun, S. Huang, Y. Fukuma, H. Idzuchi, Y. Otani, N. Fukata, K. Ishibashi, S. Oda, Applied Physics Express, Vol. 5, 045001 (2012).
5. 「Anisotropy in collective precessional dynamics in arrays of Ni80Fe20 nanoelements」B. Rana, D. Kumar, S. Barman, S. Pal, R. Mandal, Y. Fukuma, Y. Otani, S. Sugimoto, A. Barman, Journal of Applied Physics, Vol. 111, 07D503 (2012).

ー 2011 (selected papers)

• 「Giant enhancement of spin accumulation and long-distance spin precession in metallic lateral spin valves」Y. Fukuma, L. Wang, H. Idzuchi, S. Takahashi, S. Maekawa, Y. Otani, Nature Materials, Vol. 10, 527 (2011).
• 「Dynamics of coupled vortices in a pair of ferromagnetic disks」S. Sugimoto, Y. Fukuma, S. Kasai, T. Kimura, A. Barman, and Y. Otani, Physical Review Letters, Vol. 106, 197203 (2011).
• 「Optical detection of spin transport in nonmagnetic metals」F. Fohr, S. Kaltenborn, J. Hamrle, H. Schultheib, A.A. Serga, H.C. Schneider, B. Hillebrands, Y. Fukuma, L. Wang, Y. Otani, Physical Review Letters, Vol. 106, 226601 (2011).
• 「Trimmed-diamond shaped toggle magnetoresistive random access memory cells」Y. Fukuma, H. Fujiwara, P. B. Visscher, and G. J. Mankey, Journal of Applied Physics, Vol. 105, 073916 (2009).
• 「Carrier-induced ferromagnetism in Ge0.92Mn0.08Te epilayers with a Curie temperature up to 190K」Y. Fukuma, H. Asada, S. Miyawaki, T. Koyanagi, S. Senba, K. Goto, H. Sato, Applied Physics Letters, Vol. 93, 252502 (2008).
• 「Large magnetic circular dichroism of Co clusters in Co-doped ZnO」Y. Fukuma, H. Asada, J. Yamamoto, F. Odawara, T. Koyanagi, Applied Physics Letters, Vol. 93, 142510 (2008).
• 「Ferromagnetic semiconductor Ge1-xCrxTe with a Curie temperature of 180K」Y. Fukuma, H. Asada, N. Moritake, T. Irisa, T. Koyanagi, Applied Physics Letters, Vol. 91, 92501 (2007).
• 「Magnetic properties of IV-VI compound GeTe based diluted magnetic semiconductor」Y. Fukuma, H. Asada, J. Miyashita, N. Nishimura, T. Koyanagi, Journal of Applied Physics, Vol. 93, 7667 (2003).
• 「Carrier-enhanced ferromagnetism in Ge1-xMnxTe」Y. Fukuma, H. Asada, M. Arifuku, T. Koyanagi, Applied Physics Letters, Vol. 80, 1013 (2002).
• 「Film growth of Ge1-xMnxTe using ionized-cluster beam technique」Y. Fukuma T. Murakami, H. Asada, T. Koyanagi, Physica E, Vol. 10, 268 (2002).

Press Releases

• 「スピン流を高感度に検出する酸化物材料」2013年12月11日.
  理化学研究所、九州工業大学、東京大学、マイナビニュース、化学工業日報 12/13 8面、化学新聞 1/1 4面.
• 「非磁性体中を流れる磁気の向きを外部磁場で一斉に１回転」2012年9月4日.
  理化学研究所、東京大学、マイナビニュース、アメーバニュース、ナノテクジャパン、日刊工業新聞 9/6 21面

Reviews

• 「スピントロニクス技術を用いた高感度磁気センサー開発の動向」福間康裕, 大谷義近, 研究開発リーダー 2013年4月号, pp.1349-1393.
• 「非磁性体金属細線中のスピン緩和」福間康裕, 井土宏, 大谷義近, 日本磁気学会　第183回研究会資料, 2012年, pp. 25-29.
• 「NiFe/MgO/Ag接合を用いた高効率純スピン流生成技術の開発ースピン蓄積素子への応用ー」福間康裕, 工業材料, 2012年, pp. 36-37.

Patents

• 特許第5598975号「スピン注入源およびその製造方法」福間康裕, 大谷義近.
• 特許第5590488号「電流ースピン流変換素子」藤原宏平, 福間康裕, 松野丈夫, 大谷義近, 高木英典.
• 特許第4915765号「強磁性半導体交換結合膜」福間康裕, 小柳剛, 浅田裕法.
• 特許第4930933号「磁気光学素子」福間康裕, 小柳剛, 浅田裕法.