TY - JOUR
T1 - Magnetic excitations affected by spin-lattice coupling in the S= 32 triangular lattice antiferromagnet Ag2CrO2
AU - Matsuda, Masaaki
AU - Dissanayake, Sachith E.
AU - Yoshida, Hiroyuki K.
AU - Isobe, Masaaki
AU - Stone, Matthew B.
N1 - Publisher Copyright:
© 2020 American Physical Society.
PY - 2020/12/9
Y1 - 2020/12/9
N2 - Ag2CrO2 is an S=32 triangular lattice antiferromagnet in which long-range magnetic order with a fivefold magnetic unit cell appears below the transition temperature (TN) of 24 K. The long-range magnetic order is accompanied by a structural transition. Inelastic neutron scattering experiments were performed to investigate the magnetic interactions, anisotropy, and correlations in this material. Above TN, diffuse scattering originating from the short-ranged magnetic correlations consistent with a 120∘ structure was observed. The magnetic excitations below TN were reproduced reasonably well using a linear spin-wave model with further-neighbor interactions and easy-axis anisotropy, which are predicted to be due to a previously proposed spin-lattice coupling [Wang and Vishwanath, Phys. Rev. Lett. 100, 077201 (2008)PRLTAO0031-900710.1103/PhysRevLett.100.077201].
AB - Ag2CrO2 is an S=32 triangular lattice antiferromagnet in which long-range magnetic order with a fivefold magnetic unit cell appears below the transition temperature (TN) of 24 K. The long-range magnetic order is accompanied by a structural transition. Inelastic neutron scattering experiments were performed to investigate the magnetic interactions, anisotropy, and correlations in this material. Above TN, diffuse scattering originating from the short-ranged magnetic correlations consistent with a 120∘ structure was observed. The magnetic excitations below TN were reproduced reasonably well using a linear spin-wave model with further-neighbor interactions and easy-axis anisotropy, which are predicted to be due to a previously proposed spin-lattice coupling [Wang and Vishwanath, Phys. Rev. Lett. 100, 077201 (2008)PRLTAO0031-900710.1103/PhysRevLett.100.077201].
UR - http://www.scopus.com/inward/record.url?scp=85097578557&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.102.214411
DO - 10.1103/PhysRevB.102.214411
M3 - Article
AN - SCOPUS:85097578557
SN - 2469-9950
VL - 102
JO - Physical Review B
JF - Physical Review B
IS - 21
M1 - 214411
ER -