Giant shifts of crystal-field excitations in ErFeO3 driven by internal magnetic fields

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dc.contributor.authorO'Brien, Jen_AU
dc.contributor.authorDeng, GCen_AU
dc.contributor.authorMa, XXen_AU
dc.contributor.authorFeng, ZJen_AU
dc.contributor.authorRen, Wen_AU
dc.contributor.authorCao, SXen_AU
dc.contributor.authorYu, DHen_AU
dc.contributor.authorMcIntyre, GJen_AU
dc.contributor.authorUlrich, Cen_AU
dc.date.accessioned2021-12-20T03:36:48Zen_AU
dc.date.available2021-12-20T03:36:48Zen_AU
dc.date.issued2021-09-16en_AU
dc.date.statistics2021-11-23en_AU
dc.description.abstractCrystal-field excitations in transition-metal oxides where -rare-earth elements locate in the space between the transition-metal-oxide tetrahedra and octahedra, are assumed to be robust with respect to external perturbations such as temperature. Using inelastic neutron-scattering experiments, a giant shift of the energy of the lowest crystal-field excitation of Er3+ (4I15/2) in ErFeO3 from 0.35 meV to 0.75 meV was observed on cooling from 10K to 1.5K through the magnetic ordering temperature of Er3+ at 4.1 K. A crystal-field model was proposed to explain the observed crystal field excitations in this work. The model indicates the lowest-energy crystal-field excitation in ErFeO3 is the first Kramers doublet above the ground state. Its energy substantially shifts by the internal field induced by the ordered Er3+ magnetic moments. Further magnetic-field-dependent measurements provide strong supportive evidence for this scenario. By fitting the external magnetic-field dependency of the crystal-field excitation energy, the internal field generated by Er3+ magnetic moments was derived to be ~0.33meV. The result indicates that the internal field of Er3+ magnetic moments contribute to the energy shift of the crystal-field excitations. The giant energy shift under fields could be attributed to the anisotropy of the large effective g-factor. CC BY: Creative Commons Attributionen_AU
dc.identifier.articlenumberarXiv:2109.07667en_AU
dc.identifier.citationO'Brien, J., Deng, G., Ma, X., Feng, Z., Ren, W., Cao, S., Yu, D., McIntyre, G. J., & Ulrich, C. (2021). Giant shifts of crystal-field excitations in ErFeO3 driven by internal magnetic fields. arXiv preprint arXiv:2109.07667.en_AU
dc.identifier.issn23318422en_AU
dc.identifier.journaltitleCondensed Matteren_AU
dc.identifier.urihttps://arxiv.org/abs/2109.07667en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12575en_AU
dc.language.isoenen_AU
dc.publisherCornell Universityen_AU
dc.subjectCrystal fielden_AU
dc.subjectTransition elementsen_AU
dc.subjectOxidesen_AU
dc.subjectRare earthsen_AU
dc.subjectInelastic scatteringen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectMagnetic momentsen_AU
dc.subjectAnisotropyen_AU
dc.titleGiant shifts of crystal-field excitations in ErFeO3 driven by internal magnetic fieldsen_AU
dc.typeJournal Articleen_AU
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