Synthesis, structural and magnetic studies of the CuCr1-xCoxO2 delafossite oxide
Identifieur interne : 000329 ( Main/Exploration ); précédent : 000328; suivant : 000330Synthesis, structural and magnetic studies of the CuCr1-xCoxO2 delafossite oxide
Auteurs : T. Elkhouni [Tunisie] ; M. Amami [Tunisie] ; C. V. Colin [France] ; P. Strobel [France] ; A. Ben Salah [Tunisie]Source :
- Journal of magnetism and magnetic materials [ 0304-8853 ] ; 2013.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
We modulate the spin chirality and the magnetization in CuCrO2, by doping at Cr3+ sites with magnetic ions of slightly different size. Structure and magnetic properties of delafossite oxide CuCr1-xCoxO2 (0≤x≤0.06) have been investigated. With the substitution of magnetic Co3+ for Cr3+ (S=3/2), the antiferromagnetic (AF) transition becomes broader and the transition temperature increases. However, at low temperature, the magnetic data for CuCr, -xCoxO2 shows evidence for weak ferromagnetism. Comparing the substitution effect of Co3+ to those of other magnetic metal transition, magnetization around the AF transition does not seem to correlate with randomness and lattice parameter.
Affiliations:
- France, Tunisie
- Auvergne-Rhône-Alpes, Gouvernorat de Tunis, Rhône-Alpes
- Grenoble, Tunis
- Université Joseph Fourier
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Le document en format XML
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Synthesis, structural and magnetic studies of the CuCr<sub>1-x</sub>
Co<sub>x</sub>
O<sub>2</sub>
delafossite oxide</title>
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<series><title level="j" type="main">Journal of magnetism and magnetic materials</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Antiferromagnetism</term>
<term>Chirality</term>
<term>Chromium Copper Oxides Mixed</term>
<term>Cobalt additions</term>
<term>Crystal structure</term>
<term>Delafossite structure</term>
<term>Impurities</term>
<term>Magnetic structure</term>
<term>Magnetic transitions</term>
<term>Magnetization</term>
<term>Raman spectra</term>
<term>Semimagnetic semiconductors</term>
<term>Weak ferromagnetism</term>
<term>p type semiconductor</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Chiralité</term>
<term>Aimantation</term>
<term>Impureté</term>
<term>Structure magnétique</term>
<term>Spectre Raman</term>
<term>Ferromagnétisme faible</term>
<term>Transition magnétique</term>
<term>Structure cristalline</term>
<term>Antiferromagnétisme</term>
<term>Structure delafossite</term>
<term>Chrome Cuivre Oxyde Mixte</term>
<term>Addition cobalt</term>
<term>Semiconducteur semimagnétique</term>
<term>Semiconducteur type p</term>
<term>CuCrO2</term>
</keywords>
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<front><div type="abstract" xml:lang="en">We modulate the spin chirality and the magnetization in CuCrO<sub>2</sub>
, by doping at Cr<sup>3+</sup>
sites with magnetic ions of slightly different size. Structure and magnetic properties of delafossite oxide CuCr<sub>1-x</sub>
Co<sub>x</sub>
O<sub>2</sub>
(0≤x≤0.06) have been investigated. With the substitution of magnetic Co<sup>3+</sup>
for Cr<sup>3+</sup>
(S=3/2), the antiferromagnetic (AF) transition becomes broader and the transition temperature increases. However, at low temperature, the magnetic data for CuCr, -<sub>x</sub>
Co<sub>x</sub>
O<sub>2</sub>
shows evidence for weak ferromagnetism. Comparing the substitution effect of Co<sup>3+</sup>
to those of other magnetic metal transition, magnetization around the AF transition does not seem to correlate with randomness and lattice parameter.</div>
</front>
</TEI>
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