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Physical meaning and measurement of the entropic parameter q in an inhomogeneous magnetic systems

Author

Listed:
  • M. S. Reis
  • V. S. Amaral
  • R. S. Sarthour
  • I. S. Oliveira

Abstract

In this paper we present a thorough analysis of two systems magnetically inhomogeneous: the manganite La 0.7 Sr 0.3 MnO 3 /MgO and the amorphous alloy Cu 90 Co 10 . In both cases, the non-extensive statistics yield a faithful description of the magnetic behavior of the systems. In the model proposed here, the inhomogeneous magnetic system is composed by many Maxwell-Boltzmann homogeneous bits and the entropic parameter q is related to the moments of the distribution of the inhomogeneous quantity. From the analysis of Scanning Tunnelling Spectroscopy (STS) images, the q parameter can be directly measured. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Suggested Citation

  • M. S. Reis & V. S. Amaral & R. S. Sarthour & I. S. Oliveira, 2006. "Physical meaning and measurement of the entropic parameter q in an inhomogeneous magnetic systems," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 50(1), pages 99-103, March.
    • Handle: RePEc:spr:eurphb:v:50:y:2006:i:1:p:99-103
    DOI: 10.1140/epjb/e2006-00065-5
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