NMR investigation of superconductivity and Antiferromagnetism in CaFe2As2 under pressure.
We report 75As NMR measurements in CaFe2As2, made under applied pressures up to 0.83 GPa produced by a standard clamp pressure cell. Our data reveal phase segregation of paramagnetic and antiferromagnetic (AFM) phases over a range of pressures, with the AFM phase more than 90% dominant at low temperatures. In situ rf susceptibility measurements indicate the presence of superconductivity. 75As spin-lattice relaxation experiments indicate that the 75As nuclei sample the superconductivity while in the magnetically ordered environment.
Baek
S-H
SH
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Lee
H
H
Brown
S E
SE
Curro
N J
NJ
Bauer
E D
ED
Ronning
F
F
Park
T
T
Thompson
J D
JD