Disappearance of Ising nature in Ca3ZnMnO6 studied by high-field ESR.
High-field electron spin resonance measurements of an antiferromagnet Ca3ZnMnO6 isostructure, with the Ising-chain multiferroic Ca3CoMnO6, have been carried out. Two distinct resonance modes were observed below TN = 25 K, which is well explained by conventional antiferromagnetic resonance theory with easy-plane anisotropy. The zero-field spin gap is derived to be about 166 GHz, originating from the easy-plane anisotropy and exchange interaction. Our result suggests that the Dzyaloshinsky-Moriya interaction, which may induce spin canting, is absent. Disappearance of Ising anisotropy in Ca3ZnMnO6 suggests that the Co(4+) ion, as well as the Co-Mn superexchange, plays an important role for the Ising nature in Ca3CoMnO6.
Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China. School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
M Y
MY
Ruan
Z W
ZW
Ouyang
Y M
YM
Guo
J J
JJ
Cheng
Y C
YC
Sun
Z C
ZC
Xia
G H
GH
Rao
S
S
Okubo
H
H
Ohta
D016880:Anisotropy; D017610:Calcium Compounds / Q000737:chemistry*; D003198:Computer Simulation; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D008280:Magnetics; D017895:Manganese Compounds / Q000737:chemistry*; D008956:Models, Chemical; D015394:Molecular Structure; D010087:Oxides / Q000737:chemistry*; D013113:Spin Labels; D017967:Zinc Compounds / Q000737:chemistry*
D017610:Calcium Compounds; D017895:Manganese Compounds; D010087:Oxides; D013113:Spin Labels; D017967:Zinc Compounds