Neutron scattering study in breathing pyrochlore antiferromagnet Ba3Yb2Zn5O11

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dc.contributor.authorMasuda, Ten_AU
dc.contributor.authorHaku, Ten_AU
dc.contributor.authorSoda, Men_AU
dc.contributor.authorSera, Men_AU
dc.contributor.authorKimura, Ken_AU
dc.contributor.authorTaylor, Jen_AU
dc.contributor.authorItoh, Sen_AU
dc.contributor.authorYokoo, Ten_AU
dc.contributor.authorMatsumoto, Yen_AU
dc.contributor.authorYu, DHen_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorTakeuchi, Ten_AU
dc.contributor.authorNakatsuji, Sen_AU
dc.contributor.authorKohno, Yen_AU
dc.contributor.authorSakakibara, Ten_AU
dc.contributor.authorChang, LJen_AU
dc.date.accessioned2021-08-17T03:36:47Zen_AU
dc.date.available2021-08-17T03:36:47Zen_AU
dc.date.issued2017-07-12en_AU
dc.date.statistics2021-08-11en_AU
dc.description.abstractComprehensive study on breathing pyrochlore antiferromagnet Ba3Yb2Zn5O11 [1] is presented. To identify the energy scheme of crystalline electric field (CEF), we performed inelastic neutron scattering (INS) measurement in high energy range. The observed dispersionless excitations are explained by a CEF Hamiltonian of Kramers ion Yb3+ of which the local symmetry exhibits C3v point group symmetry. The magnetic susceptibility is consistently reproduced by the energy scheme of the CEF excitations. To identify the spin Hamiltonian we performed INS experiment in low energy range and thermodynamic property measurements at low temperatures. The INS spectra are quantitatively explained by spin-1/2 single-tetrahedron model having XXZ anisotropy and Dzyaloshinskii-Moriya interaction. This model has a two-fold degeneracy of the lowest-energy state per tetrahedron and well reproduces the magnetization curveat 0.5 K and heat capacity above 1.5 K. At lower temperatures, however, we observe a broad maximum in the heat capacity around 63 mK, demonstrating that a unique quantum ground state is selected due to extra perturbations with energy scale smaller than the instrumental resolution of INS. Possible mechanisms for the ground state selection are discussed [2].en_AU
dc.identifier.citationMasuda, T., Haku , T., Soda, M., Sera, M., Kimura, K., Taylor, J., Itoh, S., Yokoo, T., Matsumoto, Y., Yu, D., Mole, R. A., Takeuchi, T., Nakatsuji, S., Kohno, Y., Sakakibara, T., & Chang, L.-J. (2017). Neutron scattering study in breathing pyrochlore antiferromagnet Ba3Yb2Zn5O11. Paper presented at ICNS 2017 (International Conference on Neutron Scattering), Daejeon, South Korea, 9 to 13 July 2017. Retrieved from: http://www.icns2017.org/program.phpen_AU
dc.identifier.conferenceenddate13 July 2017en_AU
dc.identifier.conferencenameICNS 2017 (International Conference on Neutron Scattering)en_AU
dc.identifier.conferenceplaceDaejeon, South Koreaen_AU
dc.identifier.conferencestartdate9 July 2017en_AU
dc.identifier.urihttp://www.icns2017.org/program.phpen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11380en_AU
dc.language.isoenen_AU
dc.publisherInternational Conference on Neutron Scatteringen_AU
dc.subjectPyrochloreen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectElectric fieldsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectMagnetic susceptibilityen_AU
dc.subjectThermodynamic propertiesen_AU
dc.titleNeutron scattering study in breathing pyrochlore antiferromagnet Ba3Yb2Zn5O11en_AU
dc.typeConference Abstracten_AU
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