Large magnetoresistance and charge transfer between the conduction and magnetic electrons in layered oxyselenide BiOCu0.96Se

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dc.contributor.authorKarna, SKen_AU
dc.contributor.authorHung, CHen_AU
dc.contributor.authorWu, CMen_AU
dc.contributor.authorWang, CWen_AU
dc.contributor.authorLi, WHen_AU
dc.contributor.authorSankar, Ren_AU
dc.contributor.authorChou, FCen_AU
dc.contributor.authorAvdeev, Men_AU
dc.date.accessioned2014-04-24T05:48:14Zen_AU
dc.date.available2014-04-24T05:48:14Zen_AU
dc.date.issued2013-8-27en_AU
dc.date.statistics2014-04-24en_AU
dc.description.abstractThe electrical and magnetic properties of slightly Cu-deficient BiOCu0.96Se have been investigated using neutron and X-ray diffraction, ac magnetic susceptibility, magnetization and electric resistivity measurements. The layered BiOCu0.96Se crystallizes into a tetragonal lattice with a P4/nmm symmetry. Thermal profiles of the electrical resistivity reveal a semiconductor type behavior, but depart from its course at low temperatures when antiferromagnetic coupling becomes thermally loosened at 140 K. Positive magnetoresistances are obtained at all temperatures studied. With an applied magnetic field of 0.5 kOe, the magnetoresistance reaches 235% at 2 K. It decreases with increasing temperature, but stabilizes to 70% above 60 K. Both ferromagnetic and antiferromagnetic coupling are detected between the Cu spins in the SeCu4 pyramidal blocks, which results in a non-collinear spin arrangement at low temperatures. The antiferromagnetic component becomes disordered above TN = 140 K, whereas the ferromagnetic moment persists up to TC = 300 K. Interlayer charge transfer between the conduction and magnetic electrons gives rise to an anomaly in the magnetic order parameter. © 2013, Royal Society of Chemistry.en_AU
dc.identifier.citationKarna, S.K., Hung, C. H., Wu, C. M., Wang, C. W., Li, W. H., Sankar, R., Chou, F. C., & Avdeev, M. (2013). Large magnetoresistance and charge transfer between the conduction and magnetic electrons in layered oxyselenide BiOCu0.96Se. Dalton Transactions, 42(44), 15581-15590. doi:10.1039/c3dt52245hen_AU
dc.identifier.govdoc5413en_AU
dc.identifier.issn1477-9226en_AU
dc.identifier.issue44en_AU
dc.identifier.journaltitleDalton Transactionsen_AU
dc.identifier.pagination15581-15590en_AU
dc.identifier.urihttp://dx.doi.org/10.1039/c3dt52245hen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5488en_AU
dc.identifier.volume42en_AU
dc.language.isoenen_AU
dc.publisherRoyal Society of Chemistryen_AU
dc.subjectBondingen_AU
dc.subjectValenceen_AU
dc.subjectSuperconductivityen_AU
dc.subjectNeutronsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectX-ray diffractionen_AU
dc.titleLarge magnetoresistance and charge transfer between the conduction and magnetic electrons in layered oxyselenide BiOCu0.96Seen_AU
dc.typeJournal Articleen_AU
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