Relief of spin frustration through magnetic anisotropy in the quasi-one-dimensional 𝑆= 1/2 antiferromagnet Na2⁢CuSO4⁢Cl2

We report the magnetic structure and anisotropy of the quasi-one-dimensional S=12 antiferromagnet Na2CuSO4Cl2 obtained by single-crystal neutron scattering, electron spin resonance (ESR), and magnetization measurements, following an earlier study of its dynamics [M. Fujihala, Phys. Rev. B 101, 024410 (2020)10.1103/PhysRevB.101.024410]. A Néel-Type spin structure is formed within the chain of this compound, where the spins point along the b axis, and ESR data indicate an antisymmetric exchange with a uniform Dzyaloshinskii-Moriya (DM) vector pointing along the b axis. The anisotropy g factor and magnetic structure are strong indicators of magnetic anisotropy originating from a symmetric anisotropic exchange interaction and/or a magnetic dipole interaction. These results suggest that these terms of the anisotropic spin Hamiltonian counteract the effect of the DM interaction and stabilize the Néel-Type structure in Na2CuSO4Cl2. ©2022 American Physical Society.

Keywords

Spin, Magnetism, Anisotropy, Antiferromagnetism, Sodium, Chlorine, Copper, Crystals, Neutron diffraction, Electrons

Citation

Fujihala, M., Sakuma, Y., Mitsuda, S., Nakao, A., Munakata, K., Mole, R. A., Yano, S., Yu, D. H., Takehana, K., Imanaka, Y., Akaki, M., Okubo, S., & Ohta, H. (2022). Relief of spin frustration through magnetic anisotropy in the quasi-one-dimensional S=1/2 antiferromagnet Na2CuSO4Cl2. Physical Review B, 105(14), 144410. doi:10.1103/PhysRevB.105.144410