Kyushu University Academic Staff Educational and Research Activities Database
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kazumasa yamada Last modified date:2023.11.22

Assistant Professor / condensed matter physics
Department of Physics
Faculty of Sciences

Graduate School
Undergraduate School

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Academic Degree
Dr. Sc.
Country of degree conferring institution (Overseas)
Field of Specialization
low dimensional electron system
ORCID(Open Researcher and Contributor ID)
Total Priod of education and research career in the foreign country
Outline Activities
2013-now spintronics
2008-2012 polymer
2005-2007 ferroelectrics
2001-2004 quantum dot
1995-2001 Superconductor

Research Interests
  • The planar Hall effect of spin gapless semiconductor
    keyword : spin gapless
  • spintronics
    keyword : spintronics
  • conducting polymer
    keyword : conducting polymer
  • photoconductivity of Indium Zinc oxide film
    keyword : photoconductivity, Indium Zinc oxide
Academic Activities
1. K. Yamada, B. Shinozaki, K. Yano and H. Nakamura., The temperature dependence of Hall mobility of the oxide thin film In2O3-ZnO, Journal of Physics: Conference Series, 10.1088/1742-6596/400/4/042069, 400, 042069, 2012.12.
2. K. Yamada, T. Yamaguchi, N. Kokubo, B. Shinokazi, K. Yano, H. Nakamura, The Hall effect measurement in the high resistance In2O3-ZnO polycrystalline films, Transactions of the materials research society of Japan, 34, 4, 755, 2009.12.
3. K. Makise, N. Kokubo, S. Takada, T. Yamaguti, S.Ogura, K. Yamada, B. Shinozaki, K. Yano, K. Inoue, and H. Nakamura, Superconductivity in transparent Zinc-doped In2O3 films having low carrier density, Sci. Tech. Adv. Mater.,, 9, 4, 044208, 2008.05.
4. Kazumasa Yamada, Shigeru kaku, Mizuki Yamato, Daisuke Matsumoto and Yukio Watanabe, The Relaxation of Reproducible Resistance Modulations In a Au/(Pb,La)(Zr,Ti)O3/(La,Sr)2CuO4 Thin Film in high temperatures, Ferroelectrics, 2007.02.
5. Kazumasa Yamada, Shigeru kaku, Mizuki Yamato, Daisuke Matsumoto and Yukio Watanabe, The Temperature Dependence Of Relaxation Of Resistive Memory Effect In a Metal / PLZT Thin Film, Ferroelectrics, Vol. 347, pp. 137, 2007.01.
6. Sigeru Kaku, Satoshi Miyauchi, Kazu Yamada, Daisuke Matsumoto and Yukio Watanabe, A Nonohmic Positive Temperature Coefficient of Resistance in Lattice-matched and Lattice-Mismatched Epitaxial BaTiO3 Films, Ferroelectrics, vol. 335, pp. 159, 2006.01.
7. K.Yamada, M.Stopa, Y. Tokura, T.Hatano, T.Ota, T.Yamaguchi, and S.Tarucha, Tunnel-coupling blockade in vertical/lateral hybrid dot to study many-body states for electron number N=1,2 and 3, AIP Proceedings, Part A 785, 2005.01.
8. Y. Nishi, P. Masksym, D. G. Austing, K. Yamada, H. Aoki, and S.Tarucha, Configuration Transiton between MDD and Spin-Polarized Pentagonal Molecules via Lower Spin States in a Five-Electron Quantum Dot, AIP Proceedings, Part A pp.649, 2005.01.
9. T, Ota, M. Stpa, M. Rontani, T. Hatano, K. Yamada, S. Tarucha, Y. Nakata, H. Z. Song, T. Miyazawa, T.Usuki, M.Takatsu, and N. Yokoyama, Spin States in a Single InAs Quantum Dot Moecule Probed by Single-Electron Tunneling Spectroscopy, AIP Proceedings, Part A 643, 2005.01.
10. T. Hatano, M. Stopa, T. Yamaguchi, T. Ota, K. Yamada, and S. Tarucha, Electron-spin and –orbital dependence of tunnel coupling in laterally coupled double vertical dots, Phys. Rev. Lett., Vol.93 No.6 pp.066806, 2004.01.
11. Kazumada Yamada, Bunjyu Shinozaki, and Takashi Kawaguti, Weak localization and magnetoconductance in percolative superconducing aluminum films, Phys. Rev. B, 10.1103/PhysRevB.70.144503, 70, 14, vol.70, pp.144503, 2004.01.
12. K.Yamada, M.Stopa, T.Hatano, T.Yamaguchi and S.Tarucha, Variation of co-tunneling and Kondo effects by control of coupling strength between a vertical dot and a two-dimensional electron gas, Superlattice and Microstructures, Vol 34/3-6 pp.185-189, 2003.01.
13. M.Stopa, T. Hatano, T. Ota, K. Yamada and S. Tarucha, Bond-bending model for NDR in transport through single molecules, Superlattice and Microstructures, Vol 34/3-6 pp.439-442, 2003.01.
14. T. Ota, M. Stopa, T. Hatano, K. Yamada, S. Tarucha, H. Z. Song, Y. Nakata, T. Miyazawa, T. Ohsima, and N. Yokoyama, Molecular states observed in a single pair of strongly coupled self-assembled InAs quantum dots, Superlattice and Microstructures, Vol 34/3-6 pp.159-164, 2003.01.
15. T. Hatano, M. Stopa, T. Yamaguchi, T. Ota, K. Yamada, and S. Tarucha, Delocalization energy probed by asymmetry of Coulomb diamond in double dot system, Superlattice and Microstructures, Vol 34/3-6 pp.191-194, 2003.01.
16. K. Yamada, B. Shinozaki and T. Kawaguti, Percolation and weak localization in thin discontinuous aluminum films, Physica E, 10.1016/S1386-9477(02)01020-2, 18, 1-3, 286-287, Vol.18, pp.286, 2003.01.
17. B. Shinozaki, K. Sakae, S. Inada, K. Yamada and T. Kawaguti, Investigations of the magnetic transport properties of normal metallic films under the non-uniform magnetic field, Physica E, 10.1016/S1386-9477(02)00990-6, 18, 1-3, 233-234, Vol.18, pp.363, 2003.01.
18. K. Yamada, H. Fujiki, B. Shinozaki, T. Kawaguti, Superconducting properties in granular aluminum films near percolation threshold, Physica C, 10.1016/S0921-4534(00)01768-8, 355, 1-2, 147-155, Vol.355 pp 147, 2001.01.
19. H. Fujiki, K. Yamada, B. Shinozaki, T. Kawaguti, F. Ichikawa,T. Fukami, T. Aomine, Superconducting fluctuation, localization and electron-electron interaction corrections to the magnetoconductivity in three-dimensional aluminum films, Physica C, 10.1016/S0921-4534(98)00630-3, 311, 1-2, 58-64, vol.311, no.1-2, 1, 1999.01.
20. B. Shinozaki, K. Omata, K. Yamada, T. Kawaguti, Y. Fujimori, T. Aomine, Electrical transport and superconducting properties of thin tin-copper films, Physica C, 10.1016/S0921-4534(97)01807-8, 296, 1-2, 49-56, vol.296, no.1-2, 10, 1998.01.
1. Kazumasa Yamada, Takashi Kimura, Kelvin Elphick, Marjan Samiepour and Atsufumi Hirohata, Magnetic properties and planar Hall effect of CoFeMnSi films, 2019 MMM Conference, 2019.11, We systematically investigated the structural and magnetic properties of CoFeMnSi (CFMS) Heusler alloy films, which is known as a spin gapless semiconductor. We grew CFMS films consisting of Ta (5)/Ru(5)/CFMS (20)/Ta (5) and Ru (5)/CFMS (10)/Ta (5) (thickness in nm) on Si substrates by high vacuum sputtering. We confirmed semiconductor-like behavior in these films by measuring the conventional Hall effect. The magnetic field dependence of transverse magnetoresistance was measured by introducing a magnetic field horizontal to the film. Angular dependence of transverse magnetoresistance was detected, which can be useful for magnetic sensor applications..
2. The evaluation of mobility by Hall effect of Polyaniline.
Membership in Academic Society
  • Japan Society of Applied Physics
  • The Physical Society of Japan