Complementary terahertz absorption and inelastic neutron study of the dynamic anisotropy contribution to zone-center spin waves in a canted antiferromagnet NdFeO3

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dc.contributor.authorConstable, Een_AU
dc.contributor.authorCortie, DLen_AU
dc.contributor.authorHorvat, Jen_AU
dc.contributor.authorLewis, RAen_AU
dc.contributor.authorCheng, Zen_AU
dc.contributor.authorDeng, Gen_AU
dc.contributor.authorCao, Sen_AU
dc.contributor.authorYuan, Sen_AU
dc.contributor.authorMa, Gen_AU
dc.date.accessioned2016-06-23T05:16:29Zen_AU
dc.date.available2016-06-23T05:16:29Zen_AU
dc.date.issued2014-08-19en_AU
dc.date.statistics2016-06-23en_AU
dc.description.abstractWe employ a combination of pulsed- and continuous-wave polarized terahertz spectroscopy techniques to probe temperature-dependent spin waves in the antiferromagnet NdFeO3. Our optical data span 1.6–467 K and reveal a conspicuous spin reorientation between 110 and 170 K, during which the lower-energy mode softens completely. Complementary inelastic neutron scattering reveals that the frequencies of the optically excited spin waves are consistent with a temperature-variable spin gap in the low-energy spin-wave dispersion of NdFeO3. The result links the temperature dependence of the spin waves to a dynamic in-plane anisotropy. The magnetic anisotropy is calculated based on the results of the optical measurements. The change observed in the anisotropy energy along the a and c crystal axes suggests that the spin reorientation evident in NdFeO3 is driven by temperature-dependent in-plane anisotropy.© 2014, American Physical Society.en_AU
dc.identifier.articlenumber54413en_AU
dc.identifier.citationConstable, E., Cortie, D. L., Horvat, J., Lewis, R. A, Cheng, Z., Deng, G., Cao, S., Yuan, S., & Ma, G. (2014). Complementary terahertz absorption and inelastic neutron study of the dynamic anisotropy contribution to zone-center spin waves in a canted antiferromagnet NdFeO3. Physical Review B, 90(5), 054413. doi:10.1103/PhysRevB.90.054413en_AU
dc.identifier.govdoc6747en_AU
dc.identifier.issn2469-9950en_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevB.90.054413en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7068en_AU
dc.identifier.volume90en_AU
dc.language.isoenen_AU
dc.publisherAPS Physicsen_AU
dc.subjectSpectroscopyen_AU
dc.subjectMagnetismen_AU
dc.subjectSpin wavesen_AU
dc.subjectScatteringen_AU
dc.subjectAnisotropyen_AU
dc.subjectTemperature dependenceen_AU
dc.titleComplementary terahertz absorption and inelastic neutron study of the dynamic anisotropy contribution to zone-center spin waves in a canted antiferromagnet NdFeO3en_AU
dc.typeJournal Articleen_AU
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