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Author de Francisco, C. ♦ Munoz, J. M. ♦ Zazo, M. ♦ Flores, A. G. ♦ Iniguez, J. ♦ Torres, L.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ACTIVATION ENERGY ♦ DEMAGNETIZATION ♦ ELECTRIC CONDUCTIVITY ♦ EXCITATION ♦ MAGNETIC SUSCEPTIBILITY ♦ PERMEABILITY ♦ PEROVSKITE ♦ PHYSICS ♦ RELAXATION ♦ SPECTRA
Abstract In this work a study of the magnetic aftereffect and electrical conductivity in Ba{sub 2}FeMoO{sub 6} is presented. Aftereffect measurements have been performed by recording the time evolution of magnetic permeability just after the sample demagnetization, while the electrical conductivity has been obtained by means of the four-probe technique working under ac excitation. The isochronal relaxation spectrum was constructed by evaluating at each temperature the relative variation of permeability between the end of demagnetization and a set of indexed time windows according to the fastness of the magnetic relaxation. The magnetic aftereffect spectra show two well-defined peaks related to the magnetic phase transition and the orientational processes that can be fitted by activation energies close to 0.65 eV. Electrical conductivity presents metallic behavior in the ferromagnetic region and semiconducting response in the paramagnetic zone with activation energy of 0.03 eV. {copyright} 2001 American Institute of Physics.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-06-01
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 89
Issue Number 11


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