Dynamic critical behavior of the classical anisotropic BCC Heisenberg antiferromagnet

Dynamic critical behavior of the classical anisotropic BCC Heisenberg antiferromagnet

Using a recently implemented integration method [Krech et al.] based on an iterative second-order Suzuki–Trotter decomposition scheme, we have performed spin dynamics simulations to study the critical dynamics of the BCC Heisenberg antiferromagnet with uniaxial anisotropy. This technique allowed us...

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Veröffentlicht in:Computer physics communications 2002-08, Vol.147 (1), p.97-100
Hauptverfasser: Tsai, Shan-Ho, Bunker, Alex, Landau, D.P.
Format: Artikel
Sprache:eng
Schlagworte:
Classical spin models
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Critical-point effects, specific heats, short-range order
Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.)
Exact sciences and technology
General theory and models of magnetic ordering
Heisenberg antiferromagnet
Magnetic properties and materials
Physics
Spin dynamics
Suzuki–Trotter decomposition
Uniaxial anisotropy
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Zusammenfassung:Using a recently implemented integration method [Krech et al.] based on an iterative second-order Suzuki–Trotter decomposition scheme, we have performed spin dynamics simulations to study the critical dynamics of the BCC Heisenberg antiferromagnet with uniaxial anisotropy. This technique allowed us to probe the narrow asymptotic critical region of the model and estimate the dynamic critical exponent z=2.25±0.08. Comparisons with competing theories and experimental results are presented.
ISSN:0010-4655
1879-2944
DOI:10.1016/S0010-4655(02)00224-2