Phase transitions and magnetic structures in MnW1-xMoxO4 compounds (x 0.2)
| hal.structure.identifier | Laboratoire de cristallographie et sciences des matériaux [CRISMAT] | |
| dc.contributor.author | HARDY, Vincent | |
| hal.structure.identifier | Institut des Matériaux Jean Rouxel [IMN] | |
| dc.contributor.author | PAYEN, Christophe | |
| hal.structure.identifier | Laboratoire Léon Brillouin [LLB - UMR 12] | |
| dc.contributor.author | DAMAY, Françoise | |
| hal.structure.identifier | Institut des Matériaux Jean Rouxel [IMN] | |
| dc.contributor.author | MEDDAR, Lynda | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | JOSSE, Michaël | |
| hal.structure.identifier | Institut méditerranéen de biodiversité et d'écologie marine et continentale [IMBE] | |
| dc.contributor.author | ANDRÉ, Gilles | |
| dc.date.issued | 2016-08-24 | |
| dc.identifier.issn | 0953-8984 | |
| dc.description.abstractEn | Temperature-dependent specific heat, magnetization and neutron diffraction data have been collected in zero magnetic field for polycrystalline samples of MnW1−x Mo x O4 (x ≤ 0.2) solid solution whose end-member MnWO4 exhibits a magnetoelectric multiferroic phase (AF2 phase) between T 1 ≈ 8 K and T 2 = 12.5 K. In MnW1−x Mo x O4, diamagnetic W6+ are replaced with diamagnetic Mo6+ cations and magnetic couplings among Mn2+ (3d 5, S = 5/2) ions are modified due the doping-induced tuning of the orbital hybridization between Mn 3d and O 2p states. It was observed that magnetic phase transition temperatures which are associated with the second-order AF3-to-paramagnetic (T N) and AF2-to-AF3 (T 2) transitions in pure MnWO4 slightly increase with the Mo content x. Magnetic specific heat data also indicate that the first-order AF1-to-AF2 phase transition at T 1 survives a weak doping x ≤ 0.05. This latter phase transition becomes invisible above the base temperature 2 K for higher level of doping x ≥ 0.10. Neutron powder diffraction datasets collected above 1.5 K for a sample of MnW0.8Mo0.2O4 were analyzed using the Rietveld method. The magnetic structure below ≈ 14 K is a helical incommensurate spin order with a temperature-independent propagation vector k = (−0.217(6), 0.5, 0.466(4)). This cycloidal magnetic structure is similar to the polar AF2 structure observed in MnWO4. The AF1 up-up-down-down collinear spin arrangement observed in MnWO4 is absent in our MnW0.8Mo0.2O4 sample. | |
| dc.language.iso | en | |
| dc.publisher | IOP Publishing | |
| dc.title.en | Phase transitions and magnetic structures in MnW1-xMoxO4 compounds (x 0.2) | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1088/0953-8984/28/33/336003 | |
| dc.subject.hal | Physique [physics] | |
| bordeaux.journal | Journal of Physics: Condensed Matter | |
| bordeaux.page | 336003 (11 p.) | |
| bordeaux.volume | 28 | |
| bordeaux.issue | 33 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-02161194 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-02161194v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Physics:%20Condensed%20Matter&rft.date=2016-08-24&rft.volume=28&rft.issue=33&rft.spage=336003%20(11%20p.)&rft.epage=336003%20(11%20p.)&rft.eissn=0953-8984&rft.issn=0953-8984&rft.au=HARDY,%20Vincent&PAYEN,%20Christophe&DAMAY,%20Fran%C3%A7oise&MEDDAR,%20Lynda&JOSSE,%20Micha%C3%ABl&rft.genre=article |
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