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- Title
Spin-wave analysis of the ferromagnetic-ferromagnetic Heisenberg spin bilayer with intralayer single-ion anisotropy and interlayer antiferromagnetic interaction.
- Authors
Chen, Yuan; Ou, Wanyan; Li, Wenan; Chen, Jipei
- Abstract
In this paper, the spin wave theory is applied to the Heisenberg spin bilayer with intralayer ferromagnetic interaction J 1 , intralayer single-ion anisotropy D and interlayer antiferromagnetic interaction J 2 . It is found that the effects of both D and J 2 on the thermodynamic quantities give rise to the two different low-temperature asymptotic behaviors with and without exponential law. For D > 0 , the interlayer antiferromagnetic interaction can induce the appearance of the maximum of the layer magnetization at finite temperatures. At the location of the layer magnetization maximum, the approximate behaviors (such as the power, linear, rational, exponential and logarithmic laws) which are driven by the temperature or the anisotropy, are obtained for the low-temperature thermodynamic properties. It is shown that the presence of antiferromagnetic interlayer interaction J 2 clearly induces more quantum fluctuations than the case where the interlayer interaction J 2 is ferromagnetic. Our results of the layer magnetization agree with the experimental data of the layered van der Waals crystal FeCl2 at low temperatures. In the monolayer case of J 2 = 0 , our results are in agreement with the findings obtained by the existing theories and the quantum Monte Carlo data.
- Subjects
THERMODYNAMICS; SPIN waves; ANISOTROPY; QUANTUM fluctuations; QUANTUM theory; LOW temperatures; INELASTIC neutron scattering; BILAYER lipid membranes
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2024, Vol 38, Issue 19, p1
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S0217979224502552