Transition from antiferromagnetic ordering to cluster-glass behaviour in the solid solution Gd<sub>4</sub>NiMg<sub>1−<i>x</i></sub>Al<i><sub>x</sub></i> (0 ≤ <i>x</i> ≤ 0.9)
| hal.structure.identifier | Institut für Anorganische und Analytische Chemie | |
| dc.contributor.author | LINSINGER, Stefan | |
| hal.structure.identifier | Institut für Anorganische und Analytische Chemie | |
| dc.contributor.author | HERMES, Wilfried | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | CHEVALIER, Bernard | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | COUILLAUD, Samuel | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | BOBET, Jean-Louis | |
| hal.structure.identifier | Institut für Anorganische und Analytische Chemie | |
| dc.contributor.author | EUL, Matthias | |
| hal.structure.identifier | Institut für Anorganische und Analytische Chemie | |
| dc.contributor.author | PÖTTGEN, Rainer | |
| dc.date.issued | 2009 | |
| dc.identifier.issn | 0966-9795 | |
| dc.description.abstractEn | Various samples of the solid solution Gd<sub>4</sub>NiMg<sub>1−<i>x</i></sub>Al<i><sub>x</sub></i> were synthesized from the elements in sealed tantalum ampoules in an induction furnace. These gadolinium-rich compounds crystallize with the cubic Gd<sub>4</sub>RhIn type structure, space group the F4-; 3m. All samples were characterized on the basis of Guinier powder patterns. The lattice parameter decreases with increasing aluminium content in a <i>Vegard</i>-like manner. The structures of two crystals were refined on the basis of diffractometer data: <i>a</i> = 1359.3(1), w<i>R</i>2 = 0.0711, 481 <i>F</i><sup>2</sup> values, 20 variables for Gd<sub>4</sub>NiMg<sub>0.52(1)</sub>Al<sub>0.48(1)</sub> and <i>a</i> = 1351.40(6), w<i>R</i>2 = 0.0665, 478 <i>F</i><sup>2</sup> values, 21 variables for Gd<sub>4</sub>NiMg<sub>0.10(1)</sub>Al<sub>0.90(1)</sub>. The main structural motif is a rigid three-dimensional network of edge- and corner-sharing Gd<sub>6</sub>Ni trigonal prisms and isolated (Mg/Al)<sub>4</sub> tetrahedra in fcc packing. The edge length of the tetrahedra drastically decreases from Gd<sub>4</sub>NiMg (309 pm) to Gd<sub>4</sub>NiMg<sub>0.10(1)</sub>Al<sub>0.90(1)</sub> (294 pm). The Gd<sub>4</sub>NiMg<sub>1−<i>x</i></sub>Al<i><sub>x</sub></i> samples show Curie–Weiss behaviour with slightly higher magnetic moment values than the theoretical one for a free Gd<sup>3+</sup> ion. By substitution of Gd<sub>4</sub>NiMg with aluminium the cell volume decreases and the atomic disorder (Mg/Al) induces a random distribution of the magnetic interactions. This leads to a shift of the Néel temperatures to lower values when increasing the aluminium content. Already for Gd<sub>4</sub>NiMg<sub>0.4</sub>Al<sub>0.6</sub> the long-range antiferromagnetic ordering no longer exists and the system comes into a cluster-glass state. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.title.en | Transition from antiferromagnetic ordering to cluster-glass behaviour in the solid solution Gd<sub>4</sub>NiMg<sub>1−<i>x</i></sub>Al<i><sub>x</sub></i> (0 ≤ <i>x</i> ≤ 0.9) | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.intermet.2009.05.005 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Intermetallics | |
| bordeaux.page | 1028-1034 | |
| bordeaux.volume | 17 | |
| bordeaux.issue | 12 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00420656 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| dc.subject.it | Intermetallics | |
| dc.subject.it | Miscellaneous | |
| dc.subject.it | Crystal chemistry | |
| dc.subject.it | Magnetic properties | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00420656v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Intermetallics&rft.date=2009&rft.volume=17&rft.issue=12&rft.spage=1028-1034&rft.epage=1028-1034&rft.eissn=0966-9795&rft.issn=0966-9795&rft.au=LINSINGER,%20Stefan&HERMES,%20Wilfried&CHEVALIER,%20Bernard&COUILLAUD,%20Samuel&BOBET,%20Jean-Louis&rft.genre=article |
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