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Coulomb-Driven Cluster-Glass Behavior in Mn-intercalated Ti1+yS2
Physical Review (2012)
  • Paul M. Shand, University of Northern Iowa
  • A.L. Meyer
  • M. Streicher
  • A. Wilson
  • T. Rash
  • M.W. Roth
  • Tim Kidd, University of Northern Iowa
Abstract
We have investigated the low-temperature spin-glasslike phase in the intercalated transition-metal dichalcogenide Mn0.09Ti1.1S2. A departure from Curie–Weiss behavior in the paramagnetic regime indicated the formation of small ferromagnetically correlated clusters. The Vogel–Fulcher law provided an excellent description of relaxation times in the vicinity of the transition, showing that the glasslike phase occurs due to interaction between the clusters. Cole–Cole plots for data close to the transition were linear, which is consistent with a simple exponential distribution of cluster sizes. A Monte Carlo simulation of the dichalcogenide system, including excess self-intercalated Ti ions, gave an exponential cluster-size distribution for a relatively narrow range of concentration values of Mn and Ti ions, values that were consistent with those of the Mn0.09Ti1.1S2 sample. Strong commonality in the relaxation behavior with certain ferroelectric relaxor systems suggests underlying similarity in the microscopic structure of the clusters in both systems, which may be chainlike or quasi-one-dimensional.
Disciplines
Publication Date
2012
Citation Information
Paul M. Shand, A.L. Meyer, M. Streicher, A. Wilson, et al.. "Coulomb-Driven Cluster-Glass Behavior in Mn-intercalated Ti1+yS2" Physical Review Vol. 85 Iss. 14 (2012)
Available at: http://works.bepress.com/tim-kidd/11/