Evidence for a new magnetic field scale in CeCoIn5.
The Nernst coefficient of displays two distinct anomalies in magnetic field. The feature detected at Hk approximately 23 T is similar to what is observed in CeRu2Si2 at Hm = 7.8 T where a metamagnetic transition occurs. In CeCoIn5, new frequencies are observed in de Haas-van Alphen oscillations when the field exceeds 23 T where the Dingle temperature decreases by about 30%. Based on the Nernst coefficient anomalies, the magnetic phase diagram of CeCoIn5 is revised.
Sheikin
I
I
Grenoble High Magnetic Field Laboratory (CNRS), BP 166, 38042 Grenoble, France.
Jin
H
H
Bel
R
R
Behnia
K
K
Proust
C
C
Flouquet
J
J
Matsuda
Y
Y
Aoki
D
D
Onuki
Y
Y