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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:
6068122
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 146:2; Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COBALT OXIDES; COPPER OXIDES; CRYSTAL STRUCTURE; ELECTRIC CONDUCTIVITY; EXPERIMENTAL DATA; FERROMAGNETISM; HIGH-TC SUPERCONDUCTORS; MAGNETIC PROPERTIES; STRONTIUM OXIDES; X-RAY DIFFRACTION; YTTRIUM OXIDES; ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COBALT COMPOUNDS; COHERENT SCATTERING; COPPER COMPOUNDS; DATA; DIFFRACTION; ELECTRICAL PROPERTIES; INFORMATION; MAGNETISM; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SCATTERING; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; TYPE-II SUPERCONDUCTORS; YTTRIUM COMPOUNDS; 360202* - Ceramics, Cermets, & Refractories- Structure & Phase Studies; 360204 - Ceramics, Cermets, & Refractories- Physical Properties

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_6068122,
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},
issn = {0022-4596},
number = ,
volume = 146:2,
place = {United States},
year = {1999},
month = {9}
}