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Haga, Yoshinori; Honda, Fuminori*; Eto, Tetsujiro*; Omi, Gendo*; Kagayama, Tomoko*; Takeshita, Nao*; Mori, Nobuo*; Nakanishi, Takeshi*; Tokiwa, Yoshifumi*; Aoki, Dai*; et al.
Journal of the Physical Society of Japan, 71(8), p.2019 - 2021, 2002/08
Times Cited Count：9 Percentile：52.77(Physics, Multidisciplinary)Pressure phase diagram of the antiferromagnet UIn3 was constructed from the electrical resistivity measurement under high pressures up to 9 GPa. Neel temperature increases monotonically with increasing pressure from 88 K at ambient pressure to 127 K at 9 GPa. We observed an additional resistive anomaly at 21 K under 1.4 GPa. This anomaly brings about an increase of the residual resistivity. The transition temperature decreases gradually with increasing pressure and disappears around 8 GPa.
Eto, Tetsujiro*; Endo, Shoichi*; Imai, Motoharu*; Katayama, Yoshinori; Kikegawa, Takumi*
Physical Review B, 61(22), p.14984 - 14988, 2000/06
Times Cited Count：49 Percentile：87.47(Materials Science, Multidisciplinary)The pressure effect on the lattice constant of NiO with the rhombohedral distorted B1 structure was studied up to 141 GPa by 
angle-dispersive x-ray diffraction using synchrotron radiation, an imaging plate, and a diamond anvil cell. The lattice constant 
and 
, expressed in the hexagonal lattice, decrease monotonously with increasing pressure. The axial rage 
decreases monotonously with increasing pressure, indicating the distortion in the rhombohedral [111] direction becomes larger as pressure increases. The signiifcant change of above 60 GPa, suggested by a recent theoretical calculation, was not observed.
Eto, Tetsujiro*; Endo, Shoichi*; Imai, Motoharu*; Katayama, Yoshinori; Kikegawa, Takumi*
Science and Technology of High Pressure (Proceedings of AIRAPT-17), p.487 - 490, 2000/00
The pressure effect on the lattice constant of NiO with the rhombohedral distorted B1 structure was studied up to 141 GPa by angle-dispersive x-ray diffraction using synchrotron radiation and an imaging plate, with reference to a recent theoretical calculation within the density-functional formalism with the local-spin density approcximation. The lattice constant and , expressed in the hexagonal lattice, decrease monotonously with increasing pressure. The axial rage decreases monotonously with increasing pressure, indicating the enhancement of the rhombohedral distortion. The signiifcant change of above 60 GPa suggested by the calculation was not observed.
