Around the composition Gd<sub>4</sub>Co<sub>3</sub>: Structural, magnetic and magnetocaloric properties of Gd<sub>6</sub>Co<sub>4.85(2)</sub>
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | TENCÉ, Sophie | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GAUDIN, Etienne | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | CHEVALIER, Bernard | |
| dc.date.issued | 2010 | |
| dc.identifier.issn | 0966-9795 | |
| dc.description.abstractEn | Investigation of the Gd–Co system around the composition Gd<sub>4</sub>Co<sub>3</sub> showed that this compound does not exist. When samples with the nominal composition Gd<sub>4</sub>Co<sub>3</sub> are synthesized a mixture of Gd<sub>12</sub>Co<sub>7</sub> and Gd<sub>6</sub>Co<sub>4.85(2)</sub> (=Gd<sub>4</sub>Co<sub>3.23(2)</sub>) is observed. Gd<sub>6</sub>Co<sub>4.85(2)</sub> is the only compound found around the composition Gd:Co = 4:3. Its structure was determined by means of X-ray diffraction on single crystal with the space group <i>P</i>6<sub>3</sub>/<i>m</i>. The cell parameters are <i>a</i> = 11.593(2) Å and <i>c</i> = 4.0495(14) Å. Its structure is closely related to the Ho<sub>4</sub>Co<sub>3.07</sub>-type or to the Ce<sub>6</sub>Ni<sub>1.67</sub>Si<sub>3</sub>-type structure. Gd<sub>6</sub>Co<sub>4.85(2)</sub> exhibits only one ferro(ferri)magnetic transition at 219(1) K and the second magnetic transition at 163 K, wrongly attributed to a spin reorientation, corresponds indeed to the ferromagnetic transition of the impurity Gd<sub>12</sub>Co<sub>7</sub>. Gd<sub>6</sub>Co<sub>4.85(2)</sub> presents magnetocaloric properties with a maximal adiabatic temperature change Δ<i>T</i><sub>ad</sub> equal to 4.4 K for <i>μ</i><sub>0</sub>Δ<i>H</i> = 4.5 T. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Rare-earth intermetallics | |
| dc.subject.en | Magnetic properties | |
| dc.subject.en | Phase identification | |
| dc.subject.en | Site occupancy | |
| dc.subject.en | Energy systems | |
| dc.title.en | Around the composition Gd<sub>4</sub>Co<sub>3</sub>: Structural, magnetic and magnetocaloric properties of Gd<sub>6</sub>Co<sub>4.85(2)</sub> | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.intermet.2010.03.016 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Intermetallics | |
| bordeaux.page | 1216-1221 | |
| bordeaux.volume | 18 | |
| bordeaux.issue | 6 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00480920 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00480920v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Intermetallics&rft.date=2010&rft.volume=18&rft.issue=6&rft.spage=1216-1221&rft.epage=1216-1221&rft.eissn=0966-9795&rft.issn=0966-9795&rft.au=TENC%C3%89,%20Sophie&GAUDIN,%20Etienne&CHEVALIER,%20Bernard&rft.genre=article |
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