Nature of the spin-glass phase in dense packings of Ising dipoles with random anisotropy axes. (1st August 2017)

• Record Type: Journal Article
• Authors: Alonso, Juan J; Allés, B
• Is Part Of: Journal of physics. Volume 29:Number 35(2017)
• Publication Date: 2017-08-01
• Subjects: classical spin models -- spin glasses and other random magnets -- frustrated magnetism -- ensembles of nanoparticles; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aa7a1a
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Using tempered Monte Carlo simulations, we study the the spin-glass phase of dense packings of Ising dipoles pointing along random axes. We consider systems of dipoles (i) placed on the sites of a simple cubic lattice with lattice constant d, and (ii) placed at the center of random close packed spheres of diameter d that occupy 64% of the volume. For both cases, we find a spin-glass phase below a certain temperature T sg . By analysing the data obtained for the overlap parameter, the associated correlation length, as well as the statistics of the overlap distributions of individual samples, we find a behavior consistent with quasi-long-range order in the spin-glass phase, similar to the one previously found in strongly diluted dipolar systems.