ThuliumV1, Main, Exploration, bibRecord, 003647

Crystal and magnetic structure of the permanent magnetic material Tm2Fe14C

Identifieur interne : 003647 ( Main/Exploration ); précédent : 003646; suivant : 003648

Crystal and magnetic structure of the permanent magnetic material Tm2Fe14C

Auteurs : Ch. Hellwig [Suisse] ; K. Girgis [Suisse] ; P. Fischer [Suisse] ; K. H. J. Buschow [Pays-Bas] ; J. Schefer [Suisse]

Source :

Journal of Alloys and Compounds [ 0925-8388 ] ; 1992.

RBID : ISTEX:A8110EA21171D50D886DCAC1B06EE13F08488BB3

English descriptors

Abstract

Abstract: R2Fe14C (R, rare earth metal) compounds are considered as new permanent magnetic materials of technical interest. Investigations of the compound Tm2Fe14C by means of X-ray and neutron diffraction as well as by metallographic techniques were carried out. Tm2Fe14C crystallizes in the tetragonal space group P42/mnm and is isotypic to Nd2Fe14B. The lattice constants are a = 8.7304(2) Å and c = 11.7640(4) Å at 295 K. The nuclear and magnetic structure of Tm2Fe14C has been investigated by means of neutron diffraction at 650 K (above the Curie temperature Tc), 400 K (above the spin reorientation temperature TSR and below Tc), room temperature and 10 K. The magnetic moments of all Tm and Fe atoms are always oriented collinear and antiparallel. Measurement of the magnetization curve by means of neutron diffraction yields a TSR of 308 K, where the magnetization direction changes from parallel to the c axis above TSR to perpendicular to the c axis below TSR. The nuclear structure of Tm2Fe17Cx (Th2Ni17 structure type) has been refined simultaneously since this phase was also present in the sample.

Url:

https://api.istex.fr/document/A8110EA21171D50D886DCAC1B06EE13F08488BB3/fulltext/pdf

DOI: 10.1016/0925-8388(92)90465-L

Affiliations:

Pays-Bas, Suisse

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Le document en format XML

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<term>Free iron</term>
<term>Good agreement</term>
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<term>Neutron diffraction measurements</term>
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<term>Promising group</term>
<term>Rare earth metal</term>
<term>Reorientation temperature</term>
<term>Room temperature</term>
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<front><div type="abstract" xml:lang="en">Abstract: R2Fe14C (R, rare earth metal) compounds are considered as new permanent magnetic materials of technical interest. Investigations of the compound Tm2Fe14C by means of X-ray and neutron diffraction as well as by metallographic techniques were carried out. Tm2Fe14C crystallizes in the tetragonal space group P42/mnm and is isotypic to Nd2Fe14B. The lattice constants are a = 8.7304(2) Å and c = 11.7640(4) Å at 295 K. The nuclear and magnetic structure of Tm2Fe14C has been investigated by means of neutron diffraction at 650 K (above the Curie temperature Tc), 400 K (above the spin reorientation temperature TSR and below Tc), room temperature and 10 K. The magnetic moments of all Tm and Fe atoms are always oriented collinear and antiparallel. Measurement of the magnetization curve by means of neutron diffraction yields a TSR of 308 K, where the magnetization direction changes from parallel to the c axis above TSR to perpendicular to the c axis below TSR. The nuclear structure of Tm2Fe17Cx (Th2Ni17 structure type) has been refined simultaneously since this phase was also present in the sample.</div>
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Crystal and magnetic structure of the permanent magnetic material Tm2Fe14C

Crystal and magnetic structure of the permanent magnetic material Tm2Fe14C

Source :

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