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Article
Coercivity and Exchange Bias of Mn0.25Ti1.1S2 in the Cluster-Glass State
Physical Review B (2010)
  • Paul M. Shand, University of Northern Iowa
  • T. Rash, University of Northern Iowa
  • M. Streicher, University of Northern Iowa
  • Tim Kidd, University of Northern Iowa
  • Kayla R. Boyle, University of Northern Iowa
  • Laura H. Strauss, University of Northern Iowa
Abstract
Magnetic measurements have been carried out on the Mn-intercalated transition-metal dichalcogenide Mn0.25Ti1+yS2. The material, which contained a concentration y≈0.1 of excess intercalated Ti, exhibited paramagnetic behavior at high temperatures with an effective moment per Mn ion of μeff=6.07±0.23μB, which shows that the system comprises localized Mn2+ moments. A Curie-Weiss temperature ΘCW=−26±1K indicated that antiferromagnetic interactions were dominant. Deviation from Curie-Weiss behavior below 100 K signaled the formation of antiferromagnetically correlated clusters. Bifurcation of the zero-field-cooled and field-cooled magnetizations below 20 K indicated a transition to a cluster-glass state. The cluster-glass state exhibited hysteresis and a loop shift indicating exchange bias. The behavior of the coercivity and exchange bias can be understood using a model in which frozen spins at the periphery of a cluster interact with the antiferromagnetically correlated interior.
Disciplines
Publication Date
December 10, 2010
DOI
http://dx.doi.org/10.1103/PhysRevB.82.214413
Citation Information
Paul M. Shand, T. Rash, M. Streicher, Tim Kidd, et al.. "Coercivity and Exchange Bias of Mn0.25Ti1.1S2 in the Cluster-Glass State" Physical Review B Vol. 82 Iss. 21 (2010)
Available at: http://works.bepress.com/tim-kidd/20/