Effective realization of random magnetic fields in compounds with large single-ion anisotropy

J. Herbrych and J. Kokalj
Phys. Rev. B 95, 125129 – Published 23 March 2017

Abstract

We show that spin S=1 system with large and random single-ion anisotropy can be at low energies mapped to a S=1/2 system with random magnetic fields. This is, for example, realized in Ni(Cl1xBrx)24SC(NH2)2 compound (DTNX) and therefore it represents a long-sought realization of random local (on-site) magnetic fields in antiferromagnetic systems. We support the mapping by numerical study of S=1 and effective S=1/2 anisotropic Heisenberg chains and find excellent agreement for static quantities and also for the spin conductivity. Such systems can therefore be used to study the effects of local random magnetic fields on transport properties.

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  • Received 23 June 2016
  • Revised 6 March 2017

DOI:https://doi.org/10.1103/PhysRevB.95.125129

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

J. Herbrych1,2 and J. Kokalj3,4

  • 1Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
  • 2Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 3J. Stefan Institute, SI-1000 Ljubljana, Slovenia
  • 4Faculty of Civil and Geodetic Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia

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Issue

Vol. 95, Iss. 12 — 15 March 2017

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