Structural and magnetic phase transitions of the orthovanadates RVO3 (R= Dy, Ho, Er) as seen via neutron diffraction

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dc.contributor.authorReehuis, Men_AU
dc.contributor.authorUlrich, Cen_AU
dc.contributor.authorProkeš, Ken_AU
dc.contributor.authorMat'aš, Sen_AU
dc.contributor.authorFujioka, Jen_AU
dc.contributor.authorMiyasaka, Sen_AU
dc.contributor.authorTokura, Yen_AU
dc.contributor.authorKeimer, Ben_AU
dc.date.accessioned2011-03-07T23:17:22Zen_AU
dc.date.available2011-03-07T23:17:22Zen_AU
dc.date.issued2011-02-10en_AU
dc.date.statistics2011-02-10en_AU
dc.description.abstractThe structural and magnetic phase behavior of RVO3 with R=v Dy, Ho, and Er was studied by single-crystal neutron diffraction. Upon cooling, all three compounds show structural transitions from orthorhombic (space group Pbnm) to monoclinic (p21/b) symmetry due to the onset of orbital order at T= 188–200 K, followed by Néel transitions at T= 110–113 K due to the onset of antiferromagnetic (C-type) order of the vanadium moments. Upon further cooling, additional structural phase transitions occur for DyVO3 and ErVO3 at 60 and 56 K, respectively, where the monoclinic structure changes to an orthorhombic structure with the space group Pbnm, and the magnetic order of the V sublattice changes to a G-type structure. These transition temperatures are reduced compared to the ones previously observed for nonmagnetic R3+ ions due to exchange interactions between the V3+ and R3+ ions. For ErVO3, R-R exchange interactions drive a transition to collinear magnetic order at T= 2.5 K. For HoVO3, the onset of noncollinear, weakly ferromagnetic order of the Ho moments nearly coincides with the structural phase transition from the monoclinic to the low-temperature orthorhombic structure. This transition is characterized by an extended hysteresis between 24 and 36 K. The Dy moments in DyVO3 also exhibit noncollinear, weakly ferromagnetic order upon cooling below 13 K. With increasing temperature, the monoclinic structure of DyVO3 reappears in the temperature range between 13 and 23 K. This reentrant structural transition is associated with a rearrangement of the Dy moments. A group theoretical analysis showed that the observed magnetic states of the R3+ ions are compatible with the lattice structure. The results are discussed in the light of recent data on the magnetic field dependence of the lattice structure and magnetization of DyVO3 and HoVO3. © 2011, American Physical Societyen_AU
dc.identifier.articlenumber064404en_AU
dc.identifier.citationReehuis, M., Ulrich, C., Prokeš, K., Mat'aš, S, Fujioka, J., Miyasaka, S., Tokura, Y., & Keimer, B. (2011). Structural and magnetic phase transitions of the orthovanadates RVO3 (R= Dy, Ho, Er) as seen via neutron diffraction. Physical Review B, 83(6), 064404. doi:10.1103/PhysRevB.83.064404en_AU
dc.identifier.govdoc3278en_AU
dc.identifier.issn1098-0121en_AU
dc.identifier.issue6en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevB.83.064404en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3108en_AU
dc.identifier.volume83en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectPhase transformationsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectMagnetismen_AU
dc.subjectMonocrystalsen_AU
dc.subjectOrthorhombic latticesen_AU
dc.subjectMonoclinic latticesen_AU
dc.titleStructural and magnetic phase transitions of the orthovanadates RVO3 (R= Dy, Ho, Er) as seen via neutron diffractionen_AU
dc.typeJournal Articleen_AU
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