Frustration-driven successive metamagnetic transitions in TbB4 (2007)
Inami, T., Ohwada, K., Matsuda, Y. H., Ouyang, Z. W., Nojiri, H., Okuyama, D., ...
Resonant magnetic x-ray diffraction experiments on the Shastry-Sutherland lattice TbB$_4$ were carried out under strong pulsed magnetic fields up to 30 T. TbB$_4$ exhibits a multi-step magnetization...
Ishii, K., Hoesch, M., Inami, T., Kuzushita, K., Ohwada, K., Tsubota, M., ...
We report a Cu K-edge resonant inelastic x-ray scattering (RIXS) study of high-Tc cuprates. Momentum-resolved charge excitations in the CuO2 plane are examined from parent Mott insulators to...
High field x-ray diffraction study on a magnetic-field-induced valence transition in YbInCu4 (2005)
Matsuda, Y. H., Inami, T., Ohwada, K., Murata, Y., Nojiri, H., Murakami, Y., ...
We report the first high-field x-ray diffraction experiment using synchrotron x-rays and pulsed magnetic fields exceeding 30 T. Lattice deformation due to a magnetic-field-induced valence transition...
Mott gap excitations in twin-free YBa2Cu3O7-d (Tc = 93 K) studied by RIXS (2004)
Ishii, K., Tsutsui, K., Endoh, Y., Tohyama, T., Kuzushita, K., Inami, T., ...
Mott gap excitations in the high-Tc superconductor of the optimal doped YBa2Cu3O7-d (Tc = 93 K) have been studied by the resonant inelastic x-ray scattering method. Anisotropic spectra in the...
Ishii, K., Inami, T., Ohwada, K., Kuzushita, K., Mizuki, J., Murakami, Y., ...
Electronic excitations near the Fermi energy in the hole doped manganese oxides (La1-xSrxMnO3, x=0.2 and 0.4) have been elucidated by using the resonant inelastic x-ray scattering (RIXS) method. A...
Dual structures in PZN-xPT ferroelectric relaxors (2004)
Xu, Guangyong, Hiraka, H., Ohwada, K., Shirane, G.
We performed x-ray diffraction studies on a series of (1-$x$)Pb(Zn$_{1/3}$Nb$_{2/3}$)O$_3$-$x$PbTiO$_3$ (PZN-$x$PT) single crystals with different incident photon energies, and therefore different...
Electric Field Effects on the Diffuse Scattering in PZN-8%PT (2003)
Gehring, P. M., Ohwada, K., Shirane, G.
We report measurements of the neutron diffuse scattering from a single crystal of the relaxor ferroelectric Pb(Zn_1/3Nb_2/3)O_3 doped with 8% PbTiO_3 (PZN-8%PT) for temperatures 100 K < T < 530 K and...
The "devil's staircase" type phase transition in NaV2O5 under high pressure (2001)
Ohwada, K., Fujii, Y., Takesue, N., Isobe, M., Ueda, Y., Nakao, H., ...
The "devil's staircase" type phase transition in the quarter-filled spin-ladder compound NaV2O5 has been discovered at low temperature and high pressure by synchrotron radiation x-ray diffraction. A...
Ohwada, K., Hirota, K., Rehrig, P.W., Gehring, P.M., Noheda, B., Fujii, Y., ...
Single crystals of the relaxor PZN-xPT display an enormously strong piezoelectric character. Recent x-ray scattering studies have revealed novel electric-field induced phase transitions in PZN-8%PT....
X-ray Anomalous Scattering Study of a Charge-Ordered State in NaV2O5 (2000)
Nakao, H., Ohwada, K., Takesue, N., Fujii, Y., Isobe, M., Ueda, Y., ...
Charge ordering of V4+ and V5+ in NaV2O5 has been studied by an X-ray diffraction technique using anomalous scattering near a vanadium K-absorption edge to critically enhance a contrast between the...
Lattice dimerization and strain in inorganic spin-Peierls compound NaV2O5 (1998)
Nakao, H, Ohwada, K, Takesue, N, Fujii, Y, Isobe, M, Ueda, Y, ...
Presence of Tetrodotoxin and Tetrodotoxin-Producing Bacteria in Freshwater Sediments
Do, H. K., Hamasaki, K., Ohwada, K., Simidu, U., Noguchi, T., Shida, Y., ...
The occurrence of tetrodotoxin (TTX) in sediment from Lake Suwa, Japan, was confirmed by a tissue culture assay, high-performance liquid chromatography, and gas chromatography-mass spectrometry....
Tabor, P S, Deming, J W, Ohwada, K, Colwell, R R
Benthic animals and sediment samples were collected at deep-sea stations in the northwest (3,600-m depth) and southeast (4,300- and 5200-m depths) Atlantic Ocean. Utilization rates of [14C]glutamate...
Presence of Tetrodotoxin and Tetrodotoxin-Producing Bacteria in Freshwater Sediments
Do, H. K., Hamasaki, K., Ohwada, K., Simidu, U., Noguchi, T., Shida, Y., ...
The occurrence of tetrodotoxin (TTX) in sediment from Lake Suwa, Japan, was confirmed by a tissue culture assay, high-performance liquid chromatography, and gas chromatography-mass spectrometry....
Tabor, P S, Deming, J W, Ohwada, K, Colwell, R R
Benthic animals and sediment samples were collected at deep-sea stations in the northwest (3,600-m depth) and southeast (4,300- and 5200-m depths) Atlantic Ocean. Utilization rates of [14C]glutamate...