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SiKambe, Shinsaku; Aoki, Dai*; Salce, B.*; Bourdarot, F.*; Braithwaite, D.*; Flouquet, J.*; Brison, J.-P.*
Physical Review B, 87(11), p.115123_1 - 115123_6, 2013/03
Times Cited Count：9 Percentile：40.37(Materials Science, Multidisciplinary)The temperature dependence of the thermal expansion coefficient 
has been measured in URuSi under uniaxial pressure 
along the [100] and [110] directions up to 
GPa. For both cases, the hidden order phase transition temperature 
increases with increasing uniaxial pressure. An anomaly 
of the thermal expansion coefficient at appears to be enhanced under a small uniaxial pressure (
GPa). An antiferromagnetically ordered phase appears at 
above the critical pressure 
GPa for uniaxial pressure along the [100] direction, whereas no antiferromagnetic transition is detected up to GPa for uniaxial pressure along the [110] direction, indicating that the critical pressure is beyond GPa for the [110] case.
Flouquet, J.*; Aoki, Dai*; Bourdarot, F.*; Hardy, F.*; Hassinger, E.*; Knebel, G.*; Matsuda, Tatsuma; Maingast, C.*; Paulsen, C.*; Taufour, V.*
Journal of Physics; Conference Series, 273, p.012001_1 - 012001_25, 2011/02
Times Cited Count：15 Percentile：95.16(Physics, Condensed Matter)Si, 2Kambe, Shinsaku; Aoki, Dai*; Salce, B.*; Bourdarot, F.*; Braithwaite, D.*; Flouquet, J.*; Brison, J. P.*
no journal, ,
It experimented about the 1 axis pressure dependence of order transition temperature T
in which URuSi hid, and antiferromagnetic order T
. 2
24 mm of quality single crystals were used. In order to detect the hidden order and antiferromagnetic order transition, the thermal expansion coefficient was measured using the string gauge. The 1 axis pressure sigma performed measurement to [100], the [110] directions, and 0.6 GPa using the system which can change pressure continuously at low temperature using He gas. Under hydrostatic pressure, although T appeared from about 0.5 GPa, with the 1 axis of [100] direction pressure, it turned out that it appears from about 0.25 GPa. Moreover, T is also going up. This consistents withas a result of neutron scattering. On the other hand, in the case of [110], T was not able to be observed to 0.6 GPa.
SiKambe, Shinsaku; Tokunaga, Yo; Sakai, Hironori; Aoki, Dai*; Salce, B.*; Bourdarot, F.*; Matsuda, Tatsuma*; Haga, Yoshinori; Braithwaite, D.*; Flouquet, J.*; et al.
no journal, ,
Recent two experimental investigations in URuSi will be presented. In first part, the temperature dependence of the thermal expansion coefficient will be presented in URuSi under uniaxial pressure along the [100] and [110] directions up to GPa. For both cases, the hidden order phase transition temperature increases with increasing uniaxial pressure. An antiferromagnetically ordered phase appears at above the critical pressure GPa for uniaxial pressure along the [100] direction, whereas no antiferromagnetic transition is detected up to GPa for uniaxial pressure along the [110] direction, indicating that the critical pressure is beyond GPa for the [110] case. 2-fold intrinsic (mono-domain) susceptibility anisotropy in the basal plane, a value 
times smaller than that obtained from recent susceptibility measurements.
