Anomalous thermal expansion in orthorhombic perovskite SrIrO3: Interplay between spin-orbit coupling and the crystal lattice

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dc.contributor.authorBlanchard, PERen_AU
dc.contributor.authorReynolds, EMen_AU
dc.contributor.authorKennedy, BJen_AU
dc.contributor.authorKimpton, JAen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorBelik, AAen_AU
dc.date.accessioned2016-06-20T01:10:14Zen_AU
dc.date.available2016-06-20T01:10:14Zen_AU
dc.date.issued2014-06-16en_AU
dc.date.statistics2016-06-20en_AU
dc.description.abstractThe structure of the orthorhombic (Pbnm) polytype of SrIrO3 has been investigated between 3 and 1100 K using a combination of synchrotron and neutron diffraction methods. The orthorhombic structure persists to 1100 K, the highest temperature available in this work. This is a consequence of the larger than expected octahedral tilting estimated from the neutron diffraction studies. We postulate that the strong spin-orbit coupling of the Ir4+ cation, which splits the t2g band, introduces additional strain on the lattice. This introduces unusual thermal expansion of the cell. SrIrO3 was characterized by resistivity, magnetization, and specific heat measurements. Metallic conductivity was observed between 2 and 300 K without indication of the previously reported metal-insulator transition. The Sommerfeld constant γ was 3.12(2) mJ mol−1 K−2, and a Fermi-liquid behavior was observed between 2 and 30 K with positive magnetoresistence of up to 2% (at 70 kOe and between 2 and 50 K).© 2014, American Physical Society.en_AU
dc.identifier.articlenumber214106en_AU
dc.identifier.citationBlanchard, P. E. R., Reynolds, E., Kennedy, B. J., Kimpton, J. A., Avdeev, M., & Belik, A. A. (2014). Anomalous thermal expansion in orthorhombic perovskite SrIrO3: Interplay between spin-orbit coupling and the crystal lattice. Physical Review B, 89(21), 214106. doi:10.1103/PhysRevB.89.214106en_AU
dc.identifier.govdoc6722en_AU
dc.identifier.issn1550-235Xen_AU
dc.identifier.issue21en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevB.89.214106en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7040en_AU
dc.identifier.volume89en_AU
dc.language.isoenen_AU
dc.publisherAmerical Physical Societyen_AU
dc.subjectOrthorhombic latticesen_AU
dc.subjectSynchrotronsen_AU
dc.subjectNeutronsen_AU
dc.subjectDiffractionen_AU
dc.subjectTemperature controlen_AU
dc.subjectMagnetizationen_AU
dc.titleAnomalous thermal expansion in orthorhombic perovskite SrIrO3: Interplay between spin-orbit coupling and the crystal latticeen_AU
dc.typeJournal Articleen_AU
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