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Exploratory Materials Team
Yasujiro TAGUCHI
Team Leader
Yasujiro TAGUCHI (D.Eng.)
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Research Areas

We try to synthesize/explore novel materials that exhibit gigantic cross-correlation response in a bulk form. We also investigate fundamental properties of these materials to construct a microscopic theoretical framework by clarifying the details of cross correlation response.

Research Subject

  1. Gigantic cross-correlation response in charge-spin-orbital odered systems
  2. Ferroelectricity induced by magnetism
  3. Exploration of novel thermoelectric materials
  4. Exploration of novel magnetocaloric materials
  5. Exploration of novel superconductor

Related links

  1. RIKEN Advanced Science Institute Website_Laboratories PageNew Window

RIKEN RESEARCH

July 22, 2009
All together now
Mutual controllability of electricity and magnetism in a weak magnetic material points the way to low-power electronics New Window
March 27,2009
Twist and turn
Experiments with a rotating magnetic field provide new understanding on its coupling to the electric polarization of a multiferroic material New Window
December 12,2008
A spiral of spins
The complex arrangement of spins in a magnetic oxide gives rise to a magneto-electric effect New Window
December 05,2008
An attractive match
The search for improved 'multiferroic' materials may benefit from a new discovery in an iron-based oxide compound New Window
August 22, 2008
Easy multiferroics
The control of electric polarization using small magnetic fields augurs well for novel electronic devices New Window

List of Selected Publications

  1. T. Suzuki, M. S. Bahramy, R. Arita, Y. Taguchi, and Y. Tokura.:
    "Doping control and thermoelectric properties of R1-xAxZnSbO(R=La, Ce; A=Ca, Sr)"
    Physica Reivew B, January 2011, Vol. 83, 035204-1 -- 035204-7
  2. Y. Tokunaga, Y. Kaneko, D. Okuyama, S. Ishiwata, T. Arima, S. Wakimoto, K. Kakurai, Y. Taguchi, and Y. Tokura.:
    "Multiferroic M-type hexaferrites with a room-temperature conical state and magnetically controllable spin helicity"
    Physical Review Letters, December 2010, Vol. 105, 257201-1 - 257201-4
  3. H. Sakai, S. Ishiwata, D. Okuyama, A. Nakao, H. Nakao, Y. Murakami, Y. Taguchi, and Y. Tokura.:
    "Electron doping in the cubic perovskite SrMnO3: Isotropic metal versus chainlike ordering of Jahn-Teller polarons"
    Physical Review B, November 2010, Vol. 82, 180409(R)-1 - 180409 (R)-4
  4. S. Ishiwata, D. Okuyama, K. Kakurai, M. Nishi, Y. Taguchi, and Y. Tokura.:
    "Neutron diffraction studies on the multiferroic conical magnet Ba2Mg2Fe12O22"
    Physical Review B, May 2010, Vol.81, 174418-1-174418-8
  5. N. Kida, D. Okuyama, S. Ishiwata, Y. Taguchi, R. Shimano, K. Iwasa, T. Arima, and Y. Tokura.:
    "Electric-dipole-active magnetic resonance in the conical-spin magnet Ba2Mg2Fe12O22"
    Physical Review B, December 2009, Vol. 80, 220406(R)-1 - 220406(R)-4
  6. H. Sakai, Y. Taguchi, and Y. Tokura.:
    "Impact of bicritical fluctuation on magnetocaloric phenomena in perovskite manganites"
    Journal of Physical Society of Japan, November 2009, Vol. 78, 113708-1 - 113708-4
  7. D. Okuyama, Y. Tokunaga, R. Kumai, Y. Taguchi, T. Arima, and Y. Tokura.:
    "Lattice-form-dependent orbital shape and charge disproportionation in charge- and orbital-ordered manganites"
    Physical Review B, August 2009, Vol. 80, 064402-1-064402-8
  8. Y. Tokunaga, N Furukawa, H. Sakai, Y. Taguchi, T. Arima, and Y. Tokura.:
    "Composite domain walls in a multiferroic perovskite ferrite"
    Nature Materials, July 2009, Vol.8, 558-562
  9. S. Ishiwata, Y. Taguchi, Y. Tokunaga, H. Murakawa, Y. Onose, and Y. Tokura.:
    "Electric polarization induced by transverse magnetic field in the anisotropy-controlled conical helimagnet Ba2(Mg1-xZnx)2Fe12O22"
    Physical Review B, May 2009, Vol. 79, 180408(R)-1-180408(R)-4
  10. Ishiwata, S., Taguchi, Y., Murakawa, H., Onose, Y., and Tokura, Y.:
    "Low-magnetic-field control of electric polarization vector in a helimagnet"
    Science, 319, 1643-1646 (2008)
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