Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2009-12-17
Physics
Condensed Matter
Disordered Systems and Neural Networks
17 pages, 15 figures. Submitted to Physical Review B
Scientific paper
By means of parallel tempering Monte Carlo simulations we find strong evidence for a finite-temperature spin-glass transition in a system of diluted classical Heisenberg dipoles randomly placed on the sites of a simple cubic lattice. We perform a finite-size scaling analysis of the spin-glass susceptibility, $\chi_{{\rm SG}}$, and spin-glass correlation length, $\xi_{L}$. For the available system sizes that can be successfully equilibrated, the crossing of $\xi_{L}/L$ versus temperature is strongly affected by corrections to scaling and possibly by a short-length scale ferromagnetic spin blocking. Similarly to many studies of different three dimensional spin-glass systems, we do not find a crossing of the spin glass order parameter Binder ratio.
Gingras Michel J. -P.
Stasiak Pawel
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