Thermal evolution of spin excitations in honeycomb Ising antiferromagnetic FePSe3

Thermal evolution of spin excitations in honeycomb Ising antiferromagnetic FePSe3

Blog Article

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 Analysis of the use of fenthion via epicutaneous in dogs for Rhipicephalus sanguineus control Análise do uso de fenthion via epicutânea em cães para o controle de Rhipicephalus sanguineus an Ising Hamiltonian, and Crossing Gender Boundaries or Challenging Masculinities? Female Combatants in the Kenya Defence Forces’ (KDF) War against Al-Shabaab Militants 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.