Faculty Publications

Title

Coulomb-driven cluster-glass behavior in Mn-intercalated Ti 1+yS 2

Document Type

Article

Journal/Book/Conference Title

Physical Review B - Condensed Matter and Materials Physics

Volume

85

Issue

14

Abstract

We have investigated the low-temperature spin-glasslike phase in the intercalated transition-metal dichalcogenide Mn 0.09Ti 1.1S 2. 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 Mn 0.09Ti 1.1S 2 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. © 2012 American Physical Society.

Original Publication Date

4-27-2012

DOI of published version

10.1103/PhysRevB.85.144432

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