Abstract
Pressure-induced superconductivity is found in UIr without inversion symmetry. The pressure-temperature phase diagram has been investigated by means of the electrical resistivity, ac-susceptibility and magnetization measurements under high pressure. The phase diagram consists of three magnetic phases FM1-3 and a superconducting phase. The huge enhancement of residual resistivity and the negative magnetoresistance are found in the intermediate pressure region. These behavior may be induced by the pressure-induced structural phase transition and the accompanied phase separation in this pressure range. The superconducting phase with narrow pressure range is embedded in the FM3 phase, adjacent to zero-temperature FM3-to-nonmagnetic transition. The temperature dependence of resistivity above T SC follows non-Fermi liquid form of T 1.6. From these experimental facts, superconductivity is considered to be associated with the ferromagnetic fluctuation.
| Original language | English |
|---|---|
| Article number | 051007 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 76 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 2007 |
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Keywords
- Critical fluctuation
- Ferromagnetism
- Inversion symmetry
- Superconductivity
- UIr
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Pressure-temperature phase diagram and superconductivity in UIr. / Kobayashi, Tatsuo; Hori, Akihiro; Fukushima, Satoshi; Hidaka, Hiroyuki; Kotegawa, Hisashi; Akazawa, Teruhiko; Takeda, Keiki; Ohishi, Yasuo; Yamamoto, Etsuji.
In: Journal of the Physical Society of Japan, Vol. 76, No. 5, 051007, 05.2007.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Pressure-temperature phase diagram and superconductivity in UIr
AU - Kobayashi, Tatsuo
AU - Hori, Akihiro
AU - Fukushima, Satoshi
AU - Hidaka, Hiroyuki
AU - Kotegawa, Hisashi
AU - Akazawa, Teruhiko
AU - Takeda, Keiki
AU - Ohishi, Yasuo
AU - Yamamoto, Etsuji
PY - 2007/5
Y1 - 2007/5
N2 - Pressure-induced superconductivity is found in UIr without inversion symmetry. The pressure-temperature phase diagram has been investigated by means of the electrical resistivity, ac-susceptibility and magnetization measurements under high pressure. The phase diagram consists of three magnetic phases FM1-3 and a superconducting phase. The huge enhancement of residual resistivity and the negative magnetoresistance are found in the intermediate pressure region. These behavior may be induced by the pressure-induced structural phase transition and the accompanied phase separation in this pressure range. The superconducting phase with narrow pressure range is embedded in the FM3 phase, adjacent to zero-temperature FM3-to-nonmagnetic transition. The temperature dependence of resistivity above T SC follows non-Fermi liquid form of T 1.6. From these experimental facts, superconductivity is considered to be associated with the ferromagnetic fluctuation.
AB - Pressure-induced superconductivity is found in UIr without inversion symmetry. The pressure-temperature phase diagram has been investigated by means of the electrical resistivity, ac-susceptibility and magnetization measurements under high pressure. The phase diagram consists of three magnetic phases FM1-3 and a superconducting phase. The huge enhancement of residual resistivity and the negative magnetoresistance are found in the intermediate pressure region. These behavior may be induced by the pressure-induced structural phase transition and the accompanied phase separation in this pressure range. The superconducting phase with narrow pressure range is embedded in the FM3 phase, adjacent to zero-temperature FM3-to-nonmagnetic transition. The temperature dependence of resistivity above T SC follows non-Fermi liquid form of T 1.6. From these experimental facts, superconductivity is considered to be associated with the ferromagnetic fluctuation.
KW - Critical fluctuation
KW - Ferromagnetism
KW - Inversion symmetry
KW - Superconductivity
KW - UIr
UR - http://www.scopus.com/inward/record.url?scp=34547401156&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34547401156&partnerID=8YFLogxK
U2 - 10.1143/JPSJ.76.051007
DO - 10.1143/JPSJ.76.051007
M3 - Article
AN - SCOPUS:34547401156
VL - 76
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 5
M1 - 051007
ER -