Theoretical spin-wave dispersions in the antiferromagnetic phase AF1 of MnWO4 based on the polar atomistic model in P2

Liu, B.-Q.; Park, S.-H.; Čermák, P.; Schneidewind, A. und Xiao, Y. (5. June 2018): Theoretical spin-wave dispersions in the antiferromagnetic phase AF1 of MnWO4 based on the polar atomistic model in P2. In: Journal of physics: Condensed matter, Vol. 30, No. 29: p. 295401

Abstract

The spin wave dispersions of the low temperature antiferromagnetic phase (AF1) MnWO4 have been numerically calculated based on the recently reported non-collinear spin configuration with two different canting angles. A Heisenberg model with competing magnetic exchange couplings and single-ion anisotropy terms could properly describe the spin wave excitations, including the newly observed low-lying energy excitation mode w2=0.45 meV appearing at the magnetic zone centre. The spin wave dispersion and intensities are highly sensitive to two differently aligned spin-canting sublattices in the AF1 model. Thus this study reinsures the otherwise hardly provable hidden polar character in MnWO4.

• Item Type: Journal article
• Form of publication: Publisher's Version
• Keywords: spin wave; inelastic neutron scattering; antiferromagnetic
• Faculties: Geosciences > Department of Earth and Environmental Sciences > Crystallography and Materials Science
• Subjects: 500 Science > 500 Science; 500 Science > 530 Physics
• ISSN: 0953-8984
• Language: English