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Title: Magnetic aftereffect and electrical conductivity in double perovskite Ba{sub 2}FeMoO{sub 6}

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.

Authors:
; ; ; ; ;
Publication Date:
Sponsoring Org.:
(US)
OSTI Identifier:
40204147
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 89; Journal Issue: 11; Other Information: DOI: 10.1063/1.1356051; Othernumber: JAPIAU000089000011007642000001; 229111MMM; PBD: 1 Jun 2001; Journal ID: ISSN 0021-8979
Publisher:
The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACTIVATION ENERGY; DEMAGNETIZATION; ELECTRIC CONDUCTIVITY; EXCITATION; MAGNETIC SUSCEPTIBILITY; PERMEABILITY; PEROVSKITE; PHYSICS; RELAXATION; SPECTRA

Citation Formats

de Francisco, C, Munoz, J M, Zazo, M, Flores, A G, Iniguez, J, and Torres, L. Magnetic aftereffect and electrical conductivity in double perovskite Ba{sub 2}FeMoO{sub 6}. United States: N. p., 2001. Web. doi:10.1063/1.1356051.
de Francisco, C, Munoz, J M, Zazo, M, Flores, A G, Iniguez, J, & Torres, L. Magnetic aftereffect and electrical conductivity in double perovskite Ba{sub 2}FeMoO{sub 6}. United States. doi:10.1063/1.1356051.
de Francisco, C, Munoz, J M, Zazo, M, Flores, A G, Iniguez, J, and Torres, L. Fri . "Magnetic aftereffect and electrical conductivity in double perovskite Ba{sub 2}FeMoO{sub 6}". United States. doi:10.1063/1.1356051.
@article{osti_40204147,
title = {Magnetic aftereffect and electrical conductivity in double perovskite Ba{sub 2}FeMoO{sub 6}},
author = {de Francisco, C and Munoz, J M and Zazo, M and Flores, A G and Iniguez, J and Torres, L},
abstractNote = {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.},
doi = {10.1063/1.1356051},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 11,
volume = 89,
place = {United States},
year = {2001},
month = {6}
}