TY - JOUR
T1 - High-pressure investigations of the itinerant ferromagnet CoS2
AU - Barakat, Samira
AU - Braithwaite, Daniel
AU - Alireza, Patricia
AU - Grube, Kai
AU - Uhlarz, Marc
AU - Wilson, John
AU - Pfleiderer, Christian
AU - Flouquet, Jacques
AU - Lonzarich, Gilbert
PY - 2005/4/30
Y1 - 2005/4/30
N2 - The cubic pyrite compound CoS2 is an itinerant-electron ferromagnet with a Curie temperature of Tc=122K. Measurements of its electrical resistivity in quasi-hydrostatic Bridgman cells were performed up to pressures of p=15GPa. Tc is monotonically decreased by the application of external pressure and a first-order quantum phase transition was inferred at a pressure of pc≃6GPa. The temperature dependence of the resistivity at low temperatures (T=0.3-20 K) changes from a power-law with temperature exponent n=2 in the ferromagnetic phase to n<1.7 in the paramagnetic phase at pressures beyond pc.
AB - The cubic pyrite compound CoS2 is an itinerant-electron ferromagnet with a Curie temperature of Tc=122K. Measurements of its electrical resistivity in quasi-hydrostatic Bridgman cells were performed up to pressures of p=15GPa. Tc is monotonically decreased by the application of external pressure and a first-order quantum phase transition was inferred at a pressure of pc≃6GPa. The temperature dependence of the resistivity at low temperatures (T=0.3-20 K) changes from a power-law with temperature exponent n=2 in the ferromagnetic phase to n<1.7 in the paramagnetic phase at pressures beyond pc.
KW - CoS
KW - Cobalt disulphide
KW - Itinerant ferromagnet
KW - Quantum phase transition
UR - http://www.scopus.com/inward/record.url?scp=18144393377&partnerID=8YFLogxK
U2 - 10.1016/j.physb.2005.01.350
DO - 10.1016/j.physb.2005.01.350
M3 - Article
AN - SCOPUS:18144393377
SN - 0921-4526
VL - 359-361
SP - 1216
EP - 1218
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - SPEC. ISS.
ER -