Coexistence of long-range magnetic ordering and singlet ground state in the spin-ladder superconductor SrCa13Cu24O41

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dc.contributor.authorDeng, GCen_AU
dc.contributor.authorKenzelmann, Men_AU
dc.contributor.authorDanilkin, SAen_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorPomjakushin, Ven_AU
dc.contributor.authorImperia, Pen_AU
dc.contributor.authorPomjakushina, Een_AU
dc.contributor.authorConder, Ken_AU
dc.date.accessioned2015-09-29T02:18:22Zen_AU
dc.date.available2015-09-29T02:18:22Zen_AU
dc.date.issued2013-11-26en_AU
dc.date.statistics2015-09-18en_AU
dc.description.abstractA long-range magnetic order was discovered in the quasi-one-dimensional spin-ladder compound SrCa13Cu24O41 by susceptibility, specific heat, and neutron diffraction experiments. The temperature dependence of the magnetic Bragg peak intensity could be well fitted to the power law with a transition temperature TN = 4.23 K and a critical exponent β = 0.28, indicating a three-dimensional phase transition for a low-dimensional magnet. A computer program was coded and found two possible magnetic structure models fitting best with all the observed magnetic peaks. These models suggest the spin-ladder sublattice is magnetically ordered with Cu moments aligning along the a axis. The spin interactions are primarily antiferromagnetic along rungs and legs, while there are ferromagnetic clusters along legs. Surprisingly, the singlet-triplet spin-gap excitation is observable above and below TN, indicating a coexistence of the spin-singlet ground state and long-range magnetic ordering state in this compound. © 2013 American Physical Society.en_AU
dc.identifier.articlenumber174424en_AU
dc.identifier.citationDeng, G., Kenzelmann, M., Danilkin, S., Studer, A. J., Pomjakushin, V., Imperia, P., Pomjakushina, E., & Conder, K. (2013). Coexistence of long-range magnetic ordering and singlet ground state in the spin-ladder superconductor SrCa13Cu24O41. Physical Review B, 88(17), 174424. doi:10.1103/PhysRevB.88.174424en_AU
dc.identifier.govdoc6093en_AU
dc.identifier.issn1098-0121en_AU
dc.identifier.issue17en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevB.88.174424en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6245en_AU
dc.identifier.volume88en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectTemperature dependenceen_AU
dc.subjectMagnetsen_AU
dc.subjectSpinen_AU
dc.subjectHeaten_AU
dc.subjectAntiferromagnetic materialsen_AU
dc.titleCoexistence of long-range magnetic ordering and singlet ground state in the spin-ladder superconductor SrCa13Cu24O41en_AU
dc.typeJournal Articleen_AU
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