CobaltMaghrebV1, Main, Exploration, bibRecord, 000636

Investigation of (R1-xR'x)2(Fe,Co)17 powders by Mössbauer spectrometry

Identifieur interne : 000636 ( Main/Exploration ); précédent : 000635; suivant : 000637

Investigation of (R1-xR'x)2(Fe,Co)17 powders by Mössbauer spectrometry

Auteurs : F. Richomme [France] ; J. M. Le Breton [France] ; M. S. Ben Kraiem [Tunisie] ; A. Cheikhrouhou [Tunisie]

Source :

Journal of alloys and compounds [ 0925-8388 ] ; 2010.

RBID : Pascal:10-0383238

Descripteurs français

Pascal (Inist)
- Effet Mössbauer, Déplacement isomère, Méthode Wigner Seitz, Champ magnétique hyperfin, Point Curie, Sous réseau, Décomposition raie, Aimantation, Lanthanide alliage, Fer alliage, Cobalt alliage, Métal transition alliage.

English descriptors

KwdEn :
- Cobalt alloys, Curie point, Hyperfine magnetic field, Iron alloys, Isomer shift, Line splitting, Magnetization, Moessbauer effect, Rare earth alloys, Sublattices, Transition element alloys, Wigner-Seitz method.

Abstract

We investigated (R_1-xR'_x)₂Fe₁₇ and (R_1-xR'_x)₂Fe₁₆Co powders by ⁵⁷Fe Mössbauer spectrometry at 295 K where R and R' are Y, Nd, Sm, Gd. The spectra of the (R_1-xR'_x)₂Fe₁₇ compounds have been fitted with seven sextets: 18f₁₂, 18f₆, 18h₁₂, 18h₆, 9d₆, 9d₃ and 6c. The isomer shifts of the different Fe sites are in agreement with the Wigner-Seitz cell volumes. They do not depend on the nature of the rare earth. The hyperfine fields are consistent with the evolution of the Curie temperature. To account for substitution effects due to the partial replacement of Fe by Co, the Mössbauer spectra of the (R_1-xR'_x)₂Fe₁₆Co samples have been fitted with four sextets corresponding to the 18f, 18h, 9d, and 6c Fe sites, by considering the site occupancy of the Co atoms in the lattice. The evolution of the hyperfine field with the rare-earth concentration is discussed and interpreted in relation with the magnetic coupling between rare-earth and Fe magnetic sublattices, in agreement with previous magnetic measurements.

Affiliations:

Links toward previous steps (curation, corpus...)

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Le document en format XML

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R'<sub>x</sub>
)<sub>2</sub>
(Fe,Co)<sub>17</sub>
 powders by Mössbauer spectrometry</title>
<author><name sortKey="Richomme, F" sort="Richomme, F" uniqKey="Richomme F" first="F." last="Richomme">F. Richomme</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Investigation of (R<sub>1-x</sub>
R'<sub>x</sub>
)<sub>2</sub>
(Fe,Co)<sub>17</sub>
 powders by Mössbauer spectrometry</title>
<author><name sortKey="Richomme, F" sort="Richomme, F" uniqKey="Richomme F" first="F." last="Richomme">F. Richomme</name>
<affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Groupe de Physique des Matériaux, UMR CNRS 6634</s1>
<s2>76801 Saint-Etienne du Rouvray</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
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<region type="old region" nuts="2">Haute-Normandie</region>
<settlement type="city">Saint-Etienne du Rouvray</settlement>
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</affiliation>
</author>
<author><name sortKey="Le Breton, J M" sort="Le Breton, J M" uniqKey="Le Breton J" first="J. M." last="Le Breton">J. M. Le Breton</name>
<affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Groupe de Physique des Matériaux, UMR CNRS 6634</s1>
<s2>76801 Saint-Etienne du Rouvray</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
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<country>France</country>
<placeName><region type="region" nuts="2">Région Normandie</region>
<region type="old region" nuts="2">Haute-Normandie</region>
<settlement type="city">Saint-Etienne du Rouvray</settlement>
</placeName>
</affiliation>
</author>
<author><name sortKey="Ben Kraiem, M S" sort="Ben Kraiem, M S" uniqKey="Ben Kraiem M" first="M. S." last="Ben Kraiem">M. S. Ben Kraiem</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, B.P. 802</s1>
<s2>3018 Sfax</s2>
<s3>TUN</s3>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Tunisie</country>
<wicri:noRegion>3018 Sfax</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Cheikhrouhou, A" sort="Cheikhrouhou, A" uniqKey="Cheikhrouhou A" first="A." last="Cheikhrouhou">A. Cheikhrouhou</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, B.P. 802</s1>
<s2>3018 Sfax</s2>
<s3>TUN</s3>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Tunisie</country>
<wicri:noRegion>3018 Sfax</wicri:noRegion>
</affiliation>
</author>
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<series><title level="j" type="main">Journal of alloys and compounds</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cobalt alloys</term>
<term>Curie point</term>
<term>Hyperfine magnetic field</term>
<term>Iron alloys</term>
<term>Isomer shift</term>
<term>Line splitting</term>
<term>Magnetization</term>
<term>Moessbauer effect</term>
<term>Rare earth alloys</term>
<term>Sublattices</term>
<term>Transition element alloys</term>
<term>Wigner-Seitz method</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Effet Mössbauer</term>
<term>Déplacement isomère</term>
<term>Méthode Wigner Seitz</term>
<term>Champ magnétique hyperfin</term>
<term>Point Curie</term>
<term>Sous réseau</term>
<term>Décomposition raie</term>
<term>Aimantation</term>
<term>Lanthanide alliage</term>
<term>Fer alliage</term>
<term>Cobalt alliage</term>
<term>Métal transition alliage</term>
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<front><div type="abstract" xml:lang="en">We investigated (R<sub>1-x</sub>
R'<sub>x</sub>
)<sub>2</sub>
Fe<sub>17</sub>
 and (R<sub>1-x</sub>
R'<sub>x</sub>
)<sub>2</sub>
Fe<sub>16</sub>
Co powders by <sup>57</sup>
Fe Mössbauer spectrometry at 295 K where R and R' are Y, Nd, Sm, Gd. The spectra of the (R<sub>1-x</sub>
R'<sub>x</sub>
)<sub>2</sub>
Fe<sub>17</sub>
 compounds have been fitted with seven sextets: 18f<sub>12</sub>
, 18f<sub>6</sub>
, 18h<sub>12</sub>
, 18h<sub>6</sub>
, 9d<sub>6</sub>
, 9d<sub>3</sub>
 and 6c. The isomer shifts of the different Fe sites are in agreement with the Wigner-Seitz cell volumes. They do not depend on the nature of the rare earth. The hyperfine fields are consistent with the evolution of the Curie temperature. To account for substitution effects due to the partial replacement of Fe by Co, the Mössbauer spectra of the (R<sub>1-x</sub>
R'<sub>x</sub>
)<sub>2</sub>
Fe<sub>16</sub>
Co samples have been fitted with four sextets corresponding to the 18f, 18h, 9d, and 6c Fe sites, by considering the site occupancy of the Co atoms in the lattice. The evolution of the hyperfine field with the rare-earth concentration is discussed and interpreted in relation with the magnetic coupling between rare-earth and Fe magnetic sublattices, in agreement with previous magnetic measurements.</div>
</front>
</TEI>
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<settlement><li>Saint-Etienne du Rouvray</li>
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<tree><country name="France"><region name="Région Normandie"><name sortKey="Richomme, F" sort="Richomme, F" uniqKey="Richomme F" first="F." last="Richomme">F. Richomme</name>
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<name sortKey="Le Breton, J M" sort="Le Breton, J M" uniqKey="Le Breton J" first="J. M." last="Le Breton">J. M. Le Breton</name>
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<country name="Tunisie"><noRegion><name sortKey="Ben Kraiem, M S" sort="Ben Kraiem, M S" uniqKey="Ben Kraiem M" first="M. S." last="Ben Kraiem">M. S. Ben Kraiem</name>
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<name sortKey="Cheikhrouhou, A" sort="Cheikhrouhou, A" uniqKey="Cheikhrouhou A" first="A." last="Cheikhrouhou">A. Cheikhrouhou</name>
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Investigation of (R1-xR'x)2(Fe,Co)17 powders by Mössbauer spectrometry

Investigation of (R1-xR'x)2(Fe,Co)17 powders by Mössbauer spectrometry

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri