Numéro |
J. Phys. IV France
Volume 114, April 2004
|
|
---|---|---|
Page(s) | 357 - 359 | |
DOI | https://doi.org/10.1051/jp4:2004114082 |
J. Phys. IV France 114 (2004) 357
DOI: 10.1051/jp4:2004114082
Phase separation behaviour on
-(BEDT-TTF)
2
Cu
[N(CN)
2]Br
S. Okitsu, A. Kawamoto and K. Kumagai Division of Physics, Graduate School of Science, Hokkaido University; Kita 10 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
Abstract
The system of the deuterated
-(BEDT-TTF-
d[n,n])2Cu[ N(CN)
2] Br is situated in the critical region
between the superconducting(SC) phase and the antiferromagnetic insulator
(AFI) phase, and is just on the Mott type critical boundary of paramagnetic
metal (PM) phase and paramagnetic insulator (PI) phase . We perform two
single-crystal
13C-NMR studies on the non and the fully deuterated
- (BEDT-TTF)
2Cu[ N(CN)
2] Br at low temperature with the
applied field 9.4T. We found two new experimental results. One is that the
phase separation is found in
-(BEDT-TTF-
d[0,0])2Cu[ N(CN)
2] Br salt, like partially deuterated
-(BEDT-TTF)
2 Cu[ N(CN)
2] Br salt. The other is that the phase
separation is observed at around T* with the applied field parallel to the
conducting layer, unlike partially deuterated
-(BEDT-TTF-
d[n,n])2 Cu[ N(CN)
2] Br. The former result suggests the field
induces AF transition. the latter result suggests there is the field
direction dependence of the M-I phase separation behavior in
- (BEDT-TTF-
d[4,4])2 Cu[ N(CN)
2] Br.
Key words.
-(BEDT-TTF)
2X, field-dependence,
superconductivity, anti-ferromagnetism, phase separation.
© EDP Sciences 2004