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Eiji Takayama-Muromachi

Eiji T. Muromachi
Affiliation:
Specialty:
Solid-State Chemistry and Superconductivity
Academic degree:
Ph.D. Tokyo Institute of Technology (1983)

Working History

2009-preentNIMS fellow
2007-2008Deputy Director-General, MANA, NIMS
2006-2007Coordinating Director, Nano-scale Materials Field and Director, Advanced Nano Materials Laboratory, NIMS
2005Director, Advanced Materials Laboratory, NIMS
2001Director, Superconducting Materials Center, National Institute for Materials Science
1997Supervising researcher, National Institute for Research in Inorganic Materials
1985Senior researcher, National Institute for Research in Inorganic Materials
1984Post doctoral fellow under Prof. Navrotsky in Arizona State University
1977Researcher, National Institute for Research in Inorganic Materials

Research History

High Tc superconductors:

At the very early stage of the research of high-Tc superconductors, he reported reliable compositional, structural, superconducting properties for YBa2Cu3O7-δ, BiSr2Can-1CunOy, Nd-Ce-Sr-Cu-O superconductor, etc. These data contributed greatly for the development of research of high-Tc superconductors. Moreover, he succeeded to prepare high-quality samples for various high-Tc superconductors and offered them to physicists and crystallographers. Through the collaboration with them, he contributed to elucidate physical and crystallographic properties of the high-Tc superconductors.

Discovery of High Tc superconductors under high-pressure condition:

He applied high-pressure/high-temperature synthesis method to search new high-Tc superconductors which are stable under high pressure. He discovered various series of high-Tc superconductors with Tc higher than 100 K. So long as superconductors with Tc >100K are concerned, more than 50% of the superconductors have been discovered by his research group with the high-pressure technique. The examples of such series are (Cu0.5C0.5)Ba2Can-1CunO2n+3, GaSr2Can-1CunO2n+3 AlSr2Can-1CunO2n+3, Sr2Can-1CunO2n+d F2±y, etc.

Discovery of the cobalt oxyhydrate superconductor:

Recently, his group discovered a new cobalt oxyhydrate superconductor which is the first superconductor in cobalt oxides. This compound is quite unique having a layered structure containing water molecules and triangular lattices of the Co atoms. Its superconducting mechanism is believed to be unconventional and many researchers are paying attention for this new superconductor as seen from the fact that the original article appeared in Nature in 2003 has already been cited more than 500 times.

Selected Papers

  1. 2×2 superstructure in sodium cobalt oxide superconductors
    Takada K, Onoda M, Choi YN, Argyriou DN, Izumi F, Sakurai H, Takayama-Muromachi E, Sasaki T
    Chem Mater, 2009; 21(15): 3693–3700.
  2. Synthesis and magnetic and charge-transport properties of the correlated 4d post-Perovskite CaRhO3
    Yamaura K, Shirako Y, Kojitani H, Arai M, Young DP, Akaogi M, Nakashima M, Katsumata T, Inaguma Y, Takayama-Muromachi E
    J Am Chem Soc, 2009; 131(13): 2722-2726.
  3. Thermal conductivity and heat capacity of the relaxor ferroelectric [PbMg1/3Nb2/3O3]1-x[PbTiO3]x
    Tachibana M, Takayama-Muromachi E
    Phys Rev B Condens Matter Mater Phys, 2009; 79(10), 100104.
  4. Thermal signature of nanoscale inhomogeneities and ferroelectric order in [PbZn1/3Nb2/3O3]1-x[PbTiO3]x
    Tachibana M, Sasame K, Kawaji H, Atake T, Takayama-Muromachi E
    Phys Rev B Condens Matter Mater Phys, 2009; 80(9): 094115.
  5. Structural, properties of multiferroic BiFeO3 under hydrostatic pressure
    Belik AA, Yusa H, Hirao N, Ohishi Y, Takayama-Muromachi E
    Chem Mater, 2009; 21(14): 3400-3405.
  6. Indium-based Perovskites: A new class of near-room-temperature multiferroics
    Belik AA, Furubayashi T, Matsushita Y, Tanaka M, Hishita S, Takayama-Muromachi E
    Angew Chem Int Ed, 2009; 48(33): 6117-6120.
  7. Bi3Mn3O11: A new KSbO3-type random ferrimagnet with high TC
    Belik AA, Takayama-Muromachi E
    J Am Chem Soc, 2009; 131(27): 9504–9505.
  8. Peculiar high-pressure behavior of BiMnO3
    Belik AA, Yusa H, Hirao N, Ohishi Y, Takayama-Muromachi E
    Inorg Chem, 2009; 48(3): 1000-1004.
  9. Synthesis and properties of oxygen non-stoichiometric BiMnO3
    Belik AA, Kolodiazhnyi T, Kosuda K, Takayama-Muromachi E
    J Mater Chem, 2009; 19: 1593-1600.
  10. Magnetic and dielectric properties of hexagonal InMnO3
    Belik AA, Kamba S, Savinov M, Nuzhnyy D, Tachibana M, Takayama-Muromachi E, Goian V
    Phys Rev B Condens Matter Mater Phys, 2009; 79(5): 054411.
  11. Superconducting properties of the oxygen-deficient iron oxyarsenide TbFeAsO1-δ from underdoped to overdoped compositions
    Shi YG, Yu S, Belik AA, Matsushita Y, Tanaka M, Katsuya Y, Kobayashi K, Hata Y, Yasuoka H, Yamaura K, Takayama-Muromachi E
    Phys Rev B Condens Matter Mater Phys, 2009; 80(10): 104501.
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