DOAJ Open Access 2024

Thermal evolution of spin excitations in honeycomb Ising antiferromagnetic FePSe3

Lebing Chen Xiaokun Teng Ding Hu Feng Ye Garrett E. Granroth +4 lainnya

Abstrak

Abstract We use elastic and inelastic neutron scattering (INS) to study the antiferromagnetic (AF) phase transitions and spin excitations in the two-dimensional (2D) zig-zag antiferromagnet FePSe3. By determining the magnetic order parameter across the AF phase transition, we conclude that the AF phase transition in FePSe3 is first-order in nature. In addition, our INS measurements reveal that the spin waves in the AF ordered state have a large easy-axis magnetic anisotropy gap, consistent with an Ising Hamiltonian, and possible biquadratic magnetic exchange interactions. On warming across T N, we find that dispersive spin excitations associated with three-fold rotational symmetric AF fluctuations change into FM spin fluctuations above T N. These results suggest that the first-order AF phase transition in FePSe3 may arise from the competition between C 3 symmetric AF and C 1 symmetric FM spin fluctuations around T N, in place of a conventional second-order AF phase transition.

Topik & Kata Kunci

Materials of engineering and construction. Mechanics of materials Atomic physics. Constitution and properties of matter

Penulis (9)

Lebing Chen

Xiaokun Teng

Ding Hu

Feng Ye

Garrett E. Granroth

Ming Yi

Jae-Ho Chung

Robert J. Birgeneau

Pengcheng Dai

Format Sitasi

APA MLA BibTeX

Chen, L., Teng, X., Hu, D., Ye, F., Granroth, G.E., Yi, M. et al. (2024). Thermal evolution of spin excitations in honeycomb Ising antiferromagnetic FePSe3. https://doi.org/10.1038/s41535-024-00651-5

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Informasi Jurnal

Tahun Terbit: 2024
Sumber Database: DOAJ
DOI: 10.1038/s41535-024-00651-5
Akses: Open Access ✓