Spin-wave analysis of easy-axis quantum antiferromagnets on the triangular lattice

1992 ◽  
Vol 87 (1) ◽  
pp. 103-110 ◽  
Author(s):  
B. Kleine ◽  
E. M�ller-Hartmann ◽  
K. Frahm ◽  
P. Fazekas
Keyword(s):  
Spin Wave ◽  
Triangular Lattice ◽  
Easy Axis ◽  
Wave Analysis ◽  
Quantum Antiferromagnets

Multilayer Heisenberg models: linear spin wave analysis

1998 ◽  
Vol 190 (3) ◽  
pp. 321-331 ◽  
Author(s):  
Abdelilah Benyoussef ◽  
Abdelrhani Boubekri ◽  
Hamid Ez-Zahraouy
Keyword(s):  
Spin Wave ◽  
Wave Analysis ◽  
Heisenberg Models

Lamb Wave Analysis for Plate of Weak Ferromagnetic YFeO3

2017 ◽  
Vol 265 ◽  
pp. 152-156
Author(s):  
M.E. Adamova ◽  
E.A. Zhukov
Keyword(s):  
Wave Propagation ◽  
Lamb Wave ◽  
Easy Axis ◽  
Lamb Waves ◽  
Wave Spectrum ◽  
External Source ◽  
Sample Thickness ◽  
Wave Analysis ◽  
Yttrium Orthoferrite ◽  
Weak Ferromagnetic

The present work presents the analysis of Lamb waves in weak easy-axis ferromagnetic yttrium orthoferrite YFeO3, where the frequency and velocities spectrums were calculated based on dispersion equations. The specialties in calculated Lamb wave spectrum show the possibility of wave generation by an external source. The influence of the sample thickness on the characteristics of wave propagation in a plate is investigated.

Intrinsic localized spin-wave modes in antiferromagnetic chains with single-ion easy-axis anisotropy

1996 ◽  
Vol 54 (18) ◽  
pp. R12665-R12668 ◽  
Author(s):  
R. Lai ◽  
S. A. Kiselev ◽  
A. J. Sievers
Keyword(s):  
Spin Wave ◽  
Easy Axis ◽  
Wave Modes

Pinwheel and herringbone structures of planar rotors with anisotropic interactions on a triangular lattice with vacancies

1984 ◽  
Vol 62 (9) ◽  
pp. 915-934 ◽  
Author(s):  
A. B. Harris ◽  
O. G. Mouritsen ◽  
A. J. Berlinsky
Keyword(s):  
Field Theory ◽  
Phase Diagram ◽  
Spin Wave ◽  
Triangular Lattice ◽  
Mean Field Theory ◽  
Mean Field ◽  
Wave Theory ◽  
Finite Domain ◽  
Unexpected Result ◽  
Spin Wave Theory

A variety of theoretical techniques, including Monte Carlo (MC), mean field theory, and spin-wave theory, are used to analyze the phase diagram of a system of planar rotors on a triangular lattice with vacancies. A simple anisotropic interaction, which mimics the electric quadrupole–quadrupole interaction for diatomic molecules confined to rotate in the plane of the surface, induces a herringbone-ordered structure for the pure (x = 1) system, whereas for x ≈ 0.75, if the vacancies are free to move, a 2 × 2 pinwheel structure is favored. For x = 0.75, MC calculations give a continuous transition with Ising exponents in agreement with renormalization group predictions for this universality class, the Heisenberg model with corner-type cubic anisotropy. Mean field theory gives the unexpected result that the pinwheel phase is stable only along the herringbone-disordered state coexistence line in the temperature versus chemical potential phase diagram. Spin-wave theory is used to show that there is, in fact, a finite domain of stability for the pinwheel phase, and a complete phase diagram, which encompasses all available information, is conjectured.

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