Antiferromagnetic resonance in the Mott insulator fcc-Cs3C60.
The magnetic ground state of the fcc phase of the Mott insulator Cs3C60 was studied using a low-temperature electron spin resonance technique, and antiferromagnetic resonance (AFMR) below 1.57 K was directly observed at ambient pressure. The AFMR modes for the fcc phase of Cs3C60 were investigated using a conventional two-sublattice model with uniaxial anisotropy, and the spin-flop field was determined to be 4.7 kOe at 1.57 K. The static magnetic exchange interactions and anisotropy field for fcc-Cs3C60 were also estimated.
Department of Physics, Faculty of Science, Okayama University, Okayama 700-8530, Japan.
Yuta
Y
Suzuki
Seiji
S
Shibasaki
Yoshihiro
Y
Kubozono
Takashi
T
Kambe