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dc.contributor.authorXu, X. S.en_US
dc.contributor.authorBrinzari, T. V.en_US
dc.contributor.authorLee, S.en_US
dc.contributor.authorChu, Y. H.en_US
dc.contributor.authorMartin, L. W.en_US
dc.contributor.authorKumar, A.en_US
dc.contributor.authorMcGill, S.en_US
dc.contributor.authorRai, R. C.en_US
dc.contributor.authorRamesh, R.en_US
dc.contributor.authorGopalan, V.en_US
dc.contributor.authorCheong, S. W.en_US
dc.contributor.authorMusfeldt, J. L.en_US
dc.date.accessioned2019-04-03T06:42:25Z-
dc.date.available2019-04-03T06:42:25Z-
dc.date.issued2009-04-01en_US
dc.identifier.issn1098-0121en_US
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevB.79.134425en_US
dc.identifier.urihttp://hdl.handle.net/11536/149780-
dc.description.abstractIn order to investigate spin-charge coupling in multiferroic oxides, we measured the optical properties of BiFeO3. Although the direct 300 K charge gap is observed at 2.67 eV, absorption onset actually occurs at much lower energy with Fe3+ excitations at 1.41 and 1.90 eV. Temperature and magnetic-field-induced spectral changes reveal complex interactions between on-site crystal-field and magnetic excitations in the form of magnon sidebands. We employ the sensitivity of these magnon sidebands to map out the magnetic-field-temperature phase diagram which demonstrates optical evidence for spin spiral quenching above 20 T and suggests a spin domain reorientation near 10 T.en_US
dc.language.isoen_USen_US
dc.subjectantiferromagnetic materialsen_US
dc.subjectbismuth compoundsen_US
dc.subjectcrystal field interactionsen_US
dc.subjectferritesen_US
dc.subjectferroelectric materialsen_US
dc.subjectmagnetic domainsen_US
dc.subjectmagnetic transitionsen_US
dc.subjectmagneto-optical effectsen_US
dc.subjectmagnonsen_US
dc.subjectmultiferroicsen_US
dc.subjectspin dynamicsen_US
dc.titleOptical properties and magnetochromism in multiferroic BiFeO3en_US
dc.typeArticleen_US
dc.identifier.doi10.1103/PhysRevB.79.134425en_US
dc.identifier.journalPHYSICAL REVIEW Ben_US
dc.citation.volume79en_US
dc.citation.issue13en_US
dc.citation.spage0en_US
dc.citation.epage0en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
dc.identifier.wosnumberWOS:000265942800086en_US
dc.citation.woscount102en_US
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