T. Ohtsuki, T. Kamimura, and M. Higashiwaki, "Suppression of drain current leakage and short-channel effect in lateral Ga2O3 RF MOSFETs using (AlxGa1-x)2O3 back-barrier", IEEE Electron Device Lett. vol. 44, pp. 1829-1832 (2023).
T. Ohkochi, M. Tanaka, T. Ohtsuki, Z. Horita, F. Kitajima, A. Yamaguchi, M. Kotsugi, H. Ogawa, and M. Oura, "Present status and recent progress of research, using photoemission-electron microscopy at SPring-8", J. Electron Spectros. Relat. Phenomena vol. 267, pp. 147371 (2023).
T. Ohtsuki and M. Higashiwaki, "Crystallinity degradation and defect development in (AlxGa1-x)2O3 thin films with increased Al composition", J. Vac. Sci. Technol. A vol. 41, pp. 042712 (2023).
2022
T. Uehara, T. Ohtsuki, M. Udagawa, S. Nakatsuji, and Y. Machida, "Phonon thermal Hall effect in a metallic spin ice", Nat. Commun. vol. 13, pp. 4604 (2022).
Y. Xu, H. Man, N. Tang, T. Ohtsuki, S. Baidya, S. Nakatsuji, D. Vanderbilt, and N. Drichko, "Phonon spectrum of Pr2Zr2O7 and Pr2Ir2O7 as evidence of coupling of the lattice with electronic and magnetic degrees of freedom", Phys. Rev. B vol. 105, pp. 075137 (2022).
2020
T. Ohtsuki, Z. Tian, A. Endo, M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa, and S. Nakatsuji, "Extracting the chiral contribution to the negative longitudinal magnetoresistance in epitaxial Pr2Ir2O7 thin films", JPS Conf. Proc. vol. 30, pp. 011181 (2020).
T. Ohtsuki, Z. Tian, M. Halim, S. Nakatsuji, and M. Lippmaa, "Growth of Pr2Ir2O7 thin films using solid phase epitaxy", J. Appl. Phys. vol. 127, pp. 035303 (2020).
2019
T. Ohtsuki, Z. Tian, A. Endo, M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa, and S. Nakatsuji, "Strain-induced spontaneous Hall effect in an epitaxial thin film of a Luttinger semimetal", Proc. Natl. Acad. Sci. U.S.A. vol. 116, pp. 8803-8808 (2019).
2018
T. Tashiro, M. Mizuguchi, T. Kojima, T. Koganezawa, M. Kotsugi, T. Ohtsuki, K. Sato, T. Konno, K. Takanashi, "Fabrication of L10-FeNi phase by sputtering with rapid thermal annealing", J. Alloys Comp. vol. 750, pp. 164-170 (2018).
2017
B. Cheng, T. Ohtsuki, D. Chaudhuri, S. Nakatsuji, M. Lippmaa, and N. P. Armitage, "Dielectric anomalies and interactions in the three-dimensional quadratic band touching Luttinger semimetal Pr2Ir2O7", Nat. Commun. vol. 8, pp. 2097 (2017).
2015
T. Y. Tashiro, M. Mizuguchi, T. Kojima, T. Koganezawa, M. Kotsugi, T. Ohtsuki, and K. Takanashi, "Structural and magnetic properties of FeNi thin films fabricated on amorphous substrates", J. Appl. Phys. vol. 117, pp. 17E309 (2015).
2014
大槻匠, "円偏光光電子顕微鏡による磁性体解析", J. Vac. Soc. Jpn. vol. 57, pp. 332 (2014) [Invited].
T. Kojima, M. Mizuguchi, T. Koganezawa, M. Ogiwara, M. Kotsugi, T. Ohtsuki, T. Tashiro, and K. Takanashi, "Addition of Co to L10-ordered FeNi films: influences on magnetic properties and ordered structures", J. Phys. D: Appl. Phys. vol. 47, pp. 425001 (2014).
S. Lee, K. Edalati, H. Iwaoka, Z. Horita, T. Ohtsuki, T. Ohkochi, M. Kotsugi, T. Kojima, M. Mizuguchi, and K. Takanashi, "Formation of FeNi with L10-ordered structure using high-pressure torsion", Phil. Mag. Lett. vol. 94, pp. 639-646 (2014).
T. Ohtsuki, T. Kojima, M. Kotsugi, T. Ohkochi, M. Mizuguchi, and K. Takanashi, "Magnetic domain observation of FeCo thin films fabricated by alternate monoatomic layer deposition", J. Appl. Phys. vol. 115, pp. 043908 (2014).
2013
T. Ohtsuki, M. Kotsugi, T. Ohkochi, S. Lee, Z. Horita, and K. Takanashi, "Nanoscale characterization of FeNi alloys processed by high-pressure torsion using photoelectron emission microscope", J. Appl. Phys. vol. 114, pp. 143905 (2013).
M. Kotsugi, H. Maruyama, N. Ishimatsu, N. Kawamura, M. Suzuki, M. Mizumaki, K. Osaka, T. Matsumoto, T. Ohkochi, T. Ohtsuki, T. Kojima, K. Takanashi, and Y. Watanabe, "Structural, magnetic and electronic state characterization of L10-type ordered FeNi alloy extracted from natural meteorite", J. Phys.: Condens. Matter vol. 26, pp. 064206 (2013).
T. Kojima, M. Ogiwara, M. Mizuguchi, M. Kotsugi, T. Koganezawa, T. Ohtsuki, T. Tashiro, and K. Takanashi, "Fe-Ni composition dependence of magnetic anisotropy in artificially fabricated L10-ordered FeNi films", J. Phys.: Condens. Matter vol. 26, pp. 064207 (2013).
M. Kotsugi, M. Mizuguchi, S. Sekiya, M. Mizumaki, T. Kojima, T. Nakamura, H. Osawa, K. Kodama, T. Ohtsuki, T. Ohkochi, K. Takanashi, and Y. Watanabe, "Origin of strong magnetic anisotropy in L10-FeNi probed by angular-dependent magnetic circular dichroism", J. Magn. Magn. Mater. vol. 326, pp. 235-239 (2013).
2011
T. Ohtsuki, A. Chainani, R. Eguchi, M. Matsunami, Y. Takata, M. Taguchi, Y. Nishino, K. Tamasaku, M. Yabashi, T. Ishikawa, M. Oura, Y. Senba, H. Ohashi, and S. Shin, "Role of Ti 3d Carriers in Mediating the Ferromagnetism of Co:TiO2 Anatase Thin Films", Phys. Rev. Lett. vol. 106, pp. 047602 (2011).
P. A. Bhobe, A. Chainani, M. Taguchi, R. Eguchi, M. Matsunami, T. Ohtsuki, K. Ishizaka, M. Okawa, M. Oura, Y. Senba, H. Ohashi, M. Isobe, Y. Ueda, and S. Shin, "Electronic structure of an antiferromagnetic metal: CaCrO3", Phys. Rev. B vol. 83, pp. 165132 (2011).
K. Ishizaka, T. Kiss, T. Yamamoto, Y. Ishida, T. Saitoh, M. Matsunami, R. Eguchi, T. Ohtsuki, A. Kosuge, T. Kanai, M. Nohara, H. Takagi, S. Watanabe, and S. Shin, "Femtosecond core-level photoemission spectroscopy on 1T-TaS2 using a 60-eV laser source", Phys. Rev. B vol. 83, pp. 081104(R) (2011).
2009
T. Ohtsuki and T. Hasegawa, "Exchange Bias Effect in Anatase Co:TiO2/LaTiO3 Bilayers", Appl. Phys. Express vol. 2, pp. 033003 (2009).
T. Maruyama, T. Ohtsuki, E. Sakai, H. Abe, T. Shimada, T. Hasegawa, S. Nagamatsu, and T. Fujikawa, "Multiple-scattering approach to Ti L2,3-edge XMCD analysis for Co doped TiO2", J. Phys.: Conf. Series vol. 190, pp. 012018 (2009).
J. Miyawaki, D. Matsumura, H. Abe, T. Ohtsuki, E. Sakai, K. Amemiya, and T. Ohta, "Perpendicular magnetic anisotropy associated with strain relaxation in Ru/Co/Ru(0001): Anomalous relation of atomic and magnetic structures", Phys. Rev. B vol. 80, pp. 020408(R) (2009).
2008
H. Abe, K. Amemiya, J. Miyawaki, E. O. Sako, M. Sakamaki, D. Matsumura, T. Ohtsuki, E. Sakai, and T. Ohta, "CO Adsorption Effect on the Magnetism and Surface Structure of Fe/Co(001)", e-Journal of Surface Science and Nanotechnology vol. 6, pp. 233-236 (2008).
H. Abe, K. Amemiya, D. Matsumura, J. Miyawaki, E. O. Sako, T. Ohtsuki, E. Sakai, and T. Ohta, "Anomalous magnetic phases in Fe/Co(001) ultrathin films induced by CO adsorption", Phys. Rev. B vol. 77, pp. 054409 (2008).
2007
J. Miyawaki, D. Matsumura, H. Abe, T. Ohtsuki, E. Sakai, K. Amemiya, and T. Ohta, "Spin Reorientation Transition in Ultrathin Co Films on Ru(0001) Induced by Ru Capping", AIP Conf. Proc. vol. 882, pp. 505 (2007).
H. Abe, K. Amemiya, D. Matsumura, T. Ohtsuki, E. Sakai, T. Yokoyama, and T. Ohta, "Depth-resolved XMCD application to Fe/Ni/Cu(001) films", AIP Conf. Proc. vol. 882, pp. 384 (2007).
T. Ohtsuki, T. Kamimura, and M. Higashiwaki, "Application of (AlxGa1-x)2O3 back barrier in lateral Ga2O3 radio-frequency field-effect transistors", 65th Electronic Materials Conference (EMC2023), Santa Barbara, United States, June 28-30, 2023.
2022
T. Ohtsuki and M. Higashiwaki, "Development of defects in (AlxGa1-x)2O3 thin films associated with Al solubility limit observed by atomic force microscopy", The 4th International Workshop on Gallium Oxide and Related Materials (IWGO2022), Nagano, Japan, October 23-27, 2022.
2019
T. Ohtsuki, Z. Tian, A. Endo, M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa, and S. Nakatsuji, "Tuning of Luttinger semimetal into magnetic Weyl semimetal in an epitaxial thin film of pyrochlore iridate", International Conference on Strongly Correlated Electron Systems 2019 (SCES2019), Okayama, Japan, September 23-28, 2019.
T. Ohtsuki, Z. Tian, A. Endo, M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa, and S. Nakatsuji, "Spontaneous Hall effect in a Luttinger semimetal Pr2Ir2O7 thin film", Topological Phases and Functionality of Correlated Electron Systems 2019 (TPFC2019), Kashiwa, Japan, February 18-20, 2019.
T. Ohtsuki, Z. Tian, A. Endo, M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa, and S. Nakatsuji, "Spontaneous Hall effect in a Luttinger semimetal Pr2Ir2O7 thin film", The 19th Japan-Korea-Taiwan Symposium on Strongly Correlated Electron Systems (JKT19), Tokyo, Japan, January 11-13, 2019.
2018
T. Ohtsuki, T. Tomita, Z. Tian, M. Halim, M. Lippmaa, and S. Nakatsuji, "Field and angle dependent magnetoresistance in pyrochlore Pr2Ir2O7 thin films", International Workshop: Novel Phenomena in uantum Materials driven by Multipoles and Topology, Chiba, Japan, April 9-10, 2018.
2017
T. Ohtsuki, Z. Tian, A. Endo, M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, S. Nakatsuji, and M. Lippmaa, "Electronic and magnetotransport properties of pyrochlore Pr2Ir2O7 epitaxial thin films", J-Physics 2017: International Workshop on Multipole Physics and Related Phenomena, Iwate, Japan, September 24-28, 2017.
T. Ohtsuki, A. Endo, Z. Tian, M. Halim, S. Katsumoto, S. Nakatsuji, and M. Lippmaa, "Magnetoresistance and anomalous Hall effect in pyrochlore iridate Pr2Ir2O7 epitaxial thin films", Topological Phases and Functionality of Correlated Electron Systems 2017 (TPFC2017), Kashiwa, Japan, February 20-22, 2017.
2013
T. Ohtsuki, M. Kotsugi, T. Ohkochi, S. Lee, Z. Horita, and K. Takanashi, "Nanoscale Analysis of FeNi Alloys Processed by High-pressure Torsion Using Photoelectron Emission Microscope", 8th Pacific Rim International Congress on Advanced Materials and Processing (PRICM8), Hawaii, United States, August 4-9, 2013.
T. Ohtsuki, M. Kotsugi, T. Ohkochi, S. Lee, Z. Horita, and K. Takanashi, "Photoelectron Emission Microscopy for FeNi Alloys Processed by High-pressure Torsion", The 8th International Symposium on Metallic Multilayers (MML2013), Kyoto, Japan, May 19-24, 2013.
T. Ohtsuki, M. Kotsugi, T. Ohkochi, S. Lee, Z. Horita, and K. Takanashi, "Photoelectron Emission Microscopy of FeNi Alloys Processed by High-pressure Torsion", 12th Joint MMM/Intermag Conference, Chicago, United States, January 14-18, 2013.
M. Kotsugi, T. Ohtsuki, T. Ohkochi, T. Kojima, M. Ogiwara, M. Mizuguchi, and K. Takanashi, "Nucleation and growth of magnetic domain structure of alternate monoatomic (Fe/Ni)x multilayer deposited on step-bunched Cu(001)", 12th Joint MMM/Intermag Conference, Chicago, United States, January 14-18, 2013.
2012
T. Ohtsuki, M. Kotsugi, T. Ohkochi, T. Kojima, M. Mizuguchi, and K. Takanashi, "Magnetic domain observation of FeCo thin films using photoelectron emission microscope", International Conference of the Asian Union of Magnetics Societies 2012 (ICAUMS2012), Nara, Japan, October 2-5, 2012.
2010
T. Ohtsuki, A. Chainani, R. Eguchi, M. Matsunami, Y. Takata, M. Taguchi, Y. Nishino, K. Tamasaku, M. Yabashi, T. Ishikawa, M. Oura, Y. Senba, H. Ohashi, and S. Shin, "Evidence for Ti 3d Carrier-induced Ferromagnetism in Anatase Co:TiO2 Thin Films", 37th International Conference on Vacuum Ultraviolet and X-ray Physics (VUVX2010), Vancouver, Canada, July 11-16, 2010.
T. Ohtsuki, A. Chainani, R. Eguchi, M. Matsunami, Y. Takata, M. Oura, Y. Senba, H. Ohashi, T. Hasegawa, and S. Shin, "Resonant Photoemission Spectroscopy of Diluted Magnetic Semiconductor Co:TiO2 Thin Films", 10th Japan-Korea-Taiwan Symposium on Strongly Correlated Electron System, Himeji, Japan, March 11-13, 2010.
2008
T. Ohtsuki and T. Hasegawa, "Exchange Bias in Anatase Co-doped TiO2/LaTiO3 Epitaxial Bilayers", 16th International Symposium of SNU-UT-NTU Chemistry Departments, Seoul, Korea, February, 2008.
