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Title: The structure and weak ferromagnetism of the double layered cuprocobaltate: Y{sub 2}SrCu{sub 0.6}Co{sub 1.4}O{sub 6.5}

Abstract

Rietveld refinement of the X-ray powder diffraction (XRPD) pattern confirms that Y{sub 2}SrCu{sub 0.6}Co{sub 1.4}O{sub 6.5} is isostructural to Y{sub 2}SrCuFeO{sub 6.5}. Unlike its Fe-analog which is antiferromagnetic, Y{sub 2}SrCu{sub 0.6}Co{sub 1.4}O{sub 6.5} behaves as a three-dimensional (3D) ferromagnetic below {Tc} = 385 K with a spontaneous magnetic moment per formula unit of only {mu}{sub s} = 0.07{mu}{sub B} extrapolated to T = 0 K. The authors concluded that this weak ferromagnetism (WFM) originates from Dzyaloshinsky-Moriya (D-M) spin canting mechanism based on the observation of T{sup 2} dependence of the low-temperature magnetization. The electrical resistance of sintered samples shows an exponential dependence on temperature expo(T{sub 0}/T){sup {alpha}} with {alpha} = 1/2 in the 185--570 K temperature range, which indicates the conduction mechanism is within variable range hopping (VRH) regime with long-range Coulomb interaction between the carriers. Y{sub 2}SrCu{sub 0.6}Co{sub 1.4}O{sub 6.5} does not show any significant magneto-resistance effect in the 200--400 K temperature range.

Authors:
 [1]; ;  [2]
  1. Max-Planck-Inst. fuer Festkoerperforschung, Stuttgart (Germany)|[Univ. of Science and Technology of China, Hefei, Anhui (China)
  2. Max-Planck-Inst. fuer Festkoerperforschung, Stuttgart (Germany)
Publication Date:
OSTI Identifier:
696680
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 146; Journal Issue: 2; Other Information: PBD: Sep 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CRYSTAL STRUCTURE; ELECTRIC CONDUCTIVITY; MAGNETIC PROPERTIES; YTTRIUM OXIDES; STRONTIUM OXIDES; COPPER OXIDES; COBALT OXIDES; HIGH-TC SUPERCONDUCTORS; X-RAY DIFFRACTION; FERROMAGNETISM; EXPERIMENTAL DATA

Citation Formats

Li, R.K., Kremer, R., and Maier, J. The structure and weak ferromagnetism of the double layered cuprocobaltate: Y{sub 2}SrCu{sub 0.6}Co{sub 1.4}O{sub 6.5}. United States: N. p., 1999. Web. doi:10.1006/jssc.1999.8400.
Li, R.K., Kremer, R., & Maier, J. The structure and weak ferromagnetism of the double layered cuprocobaltate: Y{sub 2}SrCu{sub 0.6}Co{sub 1.4}O{sub 6.5}. United States. doi:10.1006/jssc.1999.8400.
Li, R.K., Kremer, R., and Maier, J. Wed . "The structure and weak ferromagnetism of the double layered cuprocobaltate: Y{sub 2}SrCu{sub 0.6}Co{sub 1.4}O{sub 6.5}". United States. doi:10.1006/jssc.1999.8400.
@article{osti_696680,
title = {The structure and weak ferromagnetism of the double layered cuprocobaltate: Y{sub 2}SrCu{sub 0.6}Co{sub 1.4}O{sub 6.5}},
author = {Li, R.K. and Kremer, R. and Maier, J.},
abstractNote = {Rietveld refinement of the X-ray powder diffraction (XRPD) pattern confirms that Y{sub 2}SrCu{sub 0.6}Co{sub 1.4}O{sub 6.5} is isostructural to Y{sub 2}SrCuFeO{sub 6.5}. Unlike its Fe-analog which is antiferromagnetic, Y{sub 2}SrCu{sub 0.6}Co{sub 1.4}O{sub 6.5} behaves as a three-dimensional (3D) ferromagnetic below {Tc} = 385 K with a spontaneous magnetic moment per formula unit of only {mu}{sub s} = 0.07{mu}{sub B} extrapolated to T = 0 K. The authors concluded that this weak ferromagnetism (WFM) originates from Dzyaloshinsky-Moriya (D-M) spin canting mechanism based on the observation of T{sup 2} dependence of the low-temperature magnetization. The electrical resistance of sintered samples shows an exponential dependence on temperature expo(T{sub 0}/T){sup {alpha}} with {alpha} = 1/2 in the 185--570 K temperature range, which indicates the conduction mechanism is within variable range hopping (VRH) regime with long-range Coulomb interaction between the carriers. Y{sub 2}SrCu{sub 0.6}Co{sub 1.4}O{sub 6.5} does not show any significant magneto-resistance effect in the 200--400 K temperature range.},
doi = {10.1006/jssc.1999.8400},
journal = {Journal of Solid State Chemistry},
number = 2,
volume = 146,
place = {United States},
year = {1999},
month = {9}
}