33 citations · 104 across the 10 of their papers we have counts for
7 papers · 1 filter
Theoretical determination of Ising-type transition by using the Self-Consistent Harmonic Approximation
A. R. Moura
Over the years, the Self-Consistent Harmonic Approximation (SCHA) has been successfully utilized to determine the transition temperature of many different magnetic models, particul…
Theoretical analysis of FMR-driven spin pumping current and its properties via Self-Consistent Harmonic Approximation
A. R. Moura
We applied the Self-Consistent Harmonic Approximation (SCHA), combined with coherent states formalism, to study the ferromagnetic resonance (FMR) in a ferromagentic/normal metal ju…
Effectiveness of the Self-Consistent Harmonic Approximation in ferromagnets with dipolar interactions
A. R. Moura
Among the various methods for treating magnetic models, the Self-Consistent Harmonic Approximation (SCHA) has successfully described ferro and antiferromagnetism in many different…
Phase transitions in the two-dimensional single-ion anisotropic ferromagnetic with long-range interactions
A. R. Moura
In the present work, we investigate the effects of long-range interactions on the phase transitions of two-dimensional ferromagnetic models with single-ion anisotropy at zero and f…
Phase transitions in the two-dimensional Anisotropic Biquadratic Heisenberg Model
Antônio R. Moura, Antônio S. T. Pires, Afrânio R. Pereira
In this paper we study the influence of the single-ion anisotropy in the two-dimensional biquadratic Heisenberg model (ABHM) on the square lattice at zero and finite low temperatur…
Study of the bilinear biquadratic Heisenberg model on a honeycomb lattice via Schwinger bosons
Antônio R. Moura, Afrânio R. Pereira
We analyze the biquadratic bilinear Heisenberg magnet on a honeycomb lattice via Schwinger boson formalism. Due to their vulnerability to quantum fluctuations, non conventional lat…
On topological spin excitations on a rigid torus
V. L. Carvalho-Santos, A. R. Moura, W. A. Moura-Melo +1
We study Heisenberg model of classical spins lying on the toroidal support, whose internal and external radii are and , respectively. The isotropic regime is characterized b…