Temperature Dependence of the Magnetization of the Ferromagnetic Spinels CdCr2Se4 and CuCr2S4 and Its Calculation in the Spin-Wave Approximation

1976 ◽  
Vol 73 (2) ◽  
pp. 455-459 ◽  
Author(s):  
A. A. Samokhvalov ◽  
Yu. N. Morozov ◽  
B. V. Karpenko ◽  
M. I. Simonova
Keyword(s):  
Temperature Dependence ◽  
Spin Wave ◽  
Wave Approximation

scholarly journals Power-law Form of the Temperature Dependence of the Magnon Specific Heat CM(T) in Linear, Planar and Spatial Antiferromagnets

1984 ◽  
Vol 37 (3) ◽  
pp. 305 ◽  
Author(s):  
SJ Joshua
Keyword(s):  
Low Temperature ◽  
Specific Heat ◽  
Temperature Dependence ◽  
Spin Wave ◽  
Power Law ◽  
Power Laws ◽  
Wave Approximation ◽  
Simple Power ◽  
Low Dimensionality

The power-law form of the temperature dependence of the magnon specific heat has been calculated for some real, low dimensionality antiferromagnetic crystals. The simple power laws predicted from dimensionality considerations are reproduced in the low temperature, non-interacting spin-wave approximation, but with limited validity.

Temperature Dependence of the Exchange Splitting in Ferromagnetic Metals II. The Study of Stoner Excitations by the de Haas–van Alphen Effect

1974 ◽  
Vol 52 (8) ◽  
pp. 704-707 ◽  
Author(s):  
D. M. Edwards
Keyword(s):  
Temperature Dependence ◽  
Spin Wave ◽  
Itinerant Electron ◽  
Exchange Splitting ◽  
Ferromagnetic Metals

It is shown that the de Haas–van Alphen (dHvA) effect in ferromagnetic metals can give information about the Stoner T2 term in the temperature dependence of the magnetization, without interference from spin wave contributions. In particular, the temperature dependence of the dHvA frequency for a very weak itinerant electron ferromagnet could distinguish clearly between conflicting theories of these materials.

On the spin wave approximation

Physica ◽  
1966 ◽  
Vol 32 (6) ◽  
pp. 1019-1032 ◽  
Author(s):  
D.A. Pink ◽  
W. Opechowski
Keyword(s):  
Spin Wave ◽  
Wave Approximation

scholarly journals Spiral antiferromagnets beyond the spin-wave approximation: FrustratedXYand Heisenberg models on the honeycomb lattice

2014 ◽  
Vol 89 (9) ◽  
Author(s):  
Andrea Di Ciolo ◽  
Juan Carrasquilla ◽  
Federico Becca ◽  
Marcos Rigol ◽  
Victor Galitski
Keyword(s):  
Spin Wave ◽  
Honeycomb Lattice ◽  
Wave Approximation ◽  
Heisenberg Models

THE 2-d HEISENBERG MODEL WITH VARIOUS TYPES OF INTERACTIONS: TEMPERATURE DEPENDENCE OF MAGNETIC PARAMETERS AND THE PHASE TRANSITION TEMPERATURE

1993 ◽  
Vol 07 (01n03) ◽  
pp. 504-507
Author(s):  
N. GARCIA ◽  
A. LEVANYUK ◽  
P. SERENA
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Temperature Dependence ◽  
Spin Wave ◽  
Phase Transition Temperature ◽  
Heisenberg Model ◽  
Wave Theory ◽  
Ferromagnetic Phase ◽  
Temperature Perturbation ◽  
Spin Wave Theory

Using the low-temperature perturbation (spin wave) theory we calculate the temperature dependence of anisotropy constant, spin-wave stiffness, spontaneous magnetization for a two-dimensional ferromagnetic Heisenberg model with various types of anisotropy and interactions. We found that the Polyakov renormalization procedure is inapplicable for ferromagnetic phase at any anisotropy. We did not find the reorientation phase transition due to dipole-dipole interaction predicted by Pescia and Pokrovsky. Taking into account the spin flips we obtained a phase transition temperature in good agreement with results of our Monte Carlo calculations. These results demonstrate also the effectiveness of the spin wave theory.

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