Magnetometry: Magnetic susceptibility measurements were
performed in a MPMS-Xl Quantum Design Squid magnetometer.
The magnetic susceptibility data were obtained by heating the
sample from 2 to 300 K, with an applied field of 0.1 T. First the data
were obtained by cooling down the sample to 2 K without any
applied field, i.e. zero field cooling measurements (ZFC); then the
data were collected after cooling down the sample from 300 to 2 K
with an applied field of 0.1 T, i.e. field cooling measurements (FC).
Magnetization measurements versus applied field were performed
up to 5 T at 5 K and 300 K, respectively.