scholarly journals Monte Carlo simulations of spin glasses at low temperatures

2001 ◽  
Vol 63 (18) ◽  
Author(s):  
Helmut G. Katzgraber ◽  
Matteo Palassini ◽  
A. P. Young
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Low Temperatures ◽  
Spin Glasses

scholarly journals Memory and superposition in a superspin glass

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
D. Peddis ◽  
K. N. Trohidou ◽  
M. Vasilakaki ◽  
G. Margaris ◽  
M. Bellusci ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Spin Glasses ◽  
Ac Susceptibility ◽  
Exchange Interactions ◽  
Zero Field ◽  
Interparticle Interactions ◽  
Surface Exchange ◽  
Atomic Spin ◽  
Superspin Glass

AbstractThe non-equilibrium dynamics of the superspin glass state of a dense assembly of ~ 2 nm MnFe2O4 nanoparticles was investigated by means of magnetization, ac susceptibility and Mössbauer spectroscopy measurements and compared to the results of Monte Carlo simulations for a mesoscopic model that includes particles morphology and interparticle interactions. The zero-field cooled (ZFC), thermoremanent (TRM), and isothermal remanent magnetization (IRM) were recorded after specific cooling protocols and compared to those of archetypal spin glasses and their dimensionality. The system is found to display glassy magnetic features. We illustrate in detail, by a number of experiments, the dynamical properties of the low-temperature superspin glass phase. We observe that these glassy features are quite similar to those of atomic spin glasses. Some differences are observed, and interestingly, the non-atomic nature of the superspin glass is also reflected by an observed superspin dimensionality crossover. Monte Carlo simulations—that explicitly take into account core and surface contributions to the magnetic properties of these ultrasmall nanoparticles in direct contact, as well as interparticle interactions—evidence effects of the interplay between (intraparticle) core/surface exchange coupling and (interparticle) dipolar and exchange interactions.

MULTICANONICAL MONTE CARLO SIMULATIONS

1993 ◽  
Vol 04 (02) ◽  
pp. 249-256 ◽  
Author(s):  
BERND A. BERG
Keyword(s):  
Monte Carlo ◽  
Phase Transitions ◽  
Monte Carlo Simulations ◽  
Spin Glasses ◽  
First Order ◽  
Wide Range ◽  
First Order Phase

The multicanonical ensemble is reviewed. Simulations of this ensemble promise improvements for a wide range of systems. Applications to first order phase transitions and spin glasses are summarized.

scholarly journals Boosting Monte Carlo simulations of spin glasses using autoregressive neural networks

2020 ◽  
Vol 101 (5) ◽  
Author(s):  
B. McNaughton ◽  
M. V. Milošević ◽  
A. Perali ◽  
S. Pilati
Keyword(s):  
Neural Networks ◽  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Spin Glasses
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