Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Mól, L. A. S."'
The use of partition function zeros in the study of phase transition is growing in the last decade mainly due to improved numerical methods as well as novel formulations and analysis. In this paper the impact of different parameters choice for the en
Externí odkaz:
http://arxiv.org/abs/2107.05506
Autor:
Stancioli, R. A., Mól, L. A. S.
Publikováno v:
Phys. Rev. B 100, 024432 (2019)
In this paper we conduct Monte Carlo simulations to investigate the thermodynamic properties of a geometry of artificial spin ice recently proposed in the literature that had been termed "rewritable" spin ice, for its experimental realization allows
Externí odkaz:
http://arxiv.org/abs/1903.08498
This contribution is devoted to cover some technical aspects related to the use of the recently proposed energy probability distribution zeros in the study of phase transitions. This method is based on the partial knowledge of the partition function
Externí odkaz:
http://arxiv.org/abs/1712.04434
In the study of phase transitions a very few models are accessible to exact solution. In the most cases analytical simplifications have to be done or some numerical technique has to be used to get insight about their critical properties. Numerically,
Externí odkaz:
http://arxiv.org/abs/1603.04928
Publikováno v:
Journal of Magnetism and Magnetic Materials (2016), pp. 341-347
We examine the phase diagram of the spin-$1$ $J_1-J_2-J_3$ ferromagnetic Heisenberg model with an easy-plane crystal field on the cubic lattice, in which $J_1$ is the ferromagnetic exchange interaction between nearest neighbors, $J_2$ is the antiferr
Externí odkaz:
http://arxiv.org/abs/1510.08412
Publikováno v:
Computer Physics Communications (2016), pp. 88-91
Using the two dimensional $XY-(S(O(3))$ model as a test case, we show that analysis of the Fisher zeros of the canonical partition function can provide signatures of a transition in the Berezinskii-Kosterlitz-Thouless ($BKT$) universality class. Stud
Externí odkaz:
http://arxiv.org/abs/1507.02231
Autor:
Loreto, R. P., Morais, L. A., Silva, R. C., Nascimento, F. S., de Araujo, C. I. L., Mól, L. A. S., Moura-Melo, W. A., Pereira, A. R.
Magnetricity- the magnetic equivalent of electricity- was recently verified experimentally for the first time. Indeed, just as the stream of electric charges produces electric current, emergent magnetic monopoles have been observed to roam freely (ge
Externí odkaz:
http://arxiv.org/abs/1404.4082
Autor:
de Araujo, C. I. L., Silva, R. C., Ribeiro, I. R. B., Nascimento, F. S., Felix, J. F., Ferreira, S. O., Mól, L. A. S., Moura-Melo, W. A., Pereira, A. R.
We have proposed in this work an original system composed by anti-dots nanopatterned in a ferromagnetic thin film, mimicking negatively the structure of an articial spin ice. In the hysteresis loop we notice the emergency of an anisotropy in the magn
Externí odkaz:
http://arxiv.org/abs/1312.1646
Autor:
Mól, L. A. S., Costa, B. V.
In this work we have used extensive Monte Carlo calculations to study the planar to paramagnetic phase transition in the two-dimensional anisotropic Heisenberg model with dipolar interactions (AHd) considering the true long-range character of the dip
Externí odkaz:
http://arxiv.org/abs/1310.4138
Publikováno v:
Appl. Phys. Lett. 103, 092403 (2013)
In this work we study demagnetization protocols for an artificial spin ice in a triangular geometry. Our results show that a simple hysteresis-like process is very efficient in driving the system to its ground state, even for a relatively strong diso
Externí odkaz:
http://arxiv.org/abs/1306.3947