Non-zero spontaneous magnetic moment along crystalline b-axis for rare earth orthoferrites

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dc.contributor.authorMohammed, MHen_AU
dc.contributor.authorCheng, ZXen_AU
dc.contributor.authorCao, SXen_AU
dc.contributor.authorRule, KCen_AU
dc.contributor.authorRichardson, Cen_AU
dc.contributor.authorEdwards, AJen_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorHorvat, Jen_AU
dc.date.accessioned2025-03-14T03:01:48Zen_AU
dc.date.available2025-03-14T03:01:48Zen_AU
dc.date.issued2020-03-20en_AU
dc.date.statistics2025-03-06en_AU
dc.description.abstractRare earth orthoferrites demonstrate great application potentials in spintronics and optical devices due to their multiferroic and magnetooptical properties. In RFeO3, magnetic R3+ undergo a spontaneous spin reorientation in a temperature range determined by R (rare earth), where the magnetic structure changes from Γ2 to Γ4. The b-axis component of their magnetic moment, Mb, is reported in numerous neutron diffraction studies to remain zero at all temperatures. More sensitive magnetometer measurements reveal a small non-zero Mb, which is minute above ∼200 K. Mb increases with cooling and reaches values of ∼10–3 μB/f.u. at temperatures within or below the spin reorientation temperatures. Our results can be explained by assuming the Fe3+ spins as the origin of non-zero Mb, while R3+ spins suppress Mb. The representation analysis of point groups shows that non-zero Mb is associated with a small admixture of the Γ3 phase to Γ2 or Γ4. Such a mixing of the three magnetic phases requires at least a fourth order of the spin Hamiltonian for RFeO3 to describe the non-zero Mb. © 2020 Author(s).en_AU
dc.description.sponsorshipMohanad H. Mohammed was supported by the Higher Committee for Education Development (HCED) in Iraq through the provision of a Ph.D. scholarship. This work is partially supported by the National Natural Science Foundation of China (NNSFC, Nos. 11774217 and 51372149). Z. X. Cheng acknowledges the Australian Research Council for support (No. DP190100150). The authors gratefully acknowledge the beam time at the Australian Nuclear Science and Technology Organisation (ANSTO) through Grant Nos. P7362 and DB7158 and access to the ANSTO PPMS through Grant No. X6356.en_AU
dc.identifier.articlenumber113906en_AU
dc.identifier.citationMohammed, M. H., Cheng, Z. X., Cao, S., Rule, K. C., Richardson, C., Edwards, A., Studer, A. J., & Horvat, J. (2020). Non-zero spontaneous magnetic moment along crystalline b-axis for rare earth orthoferrites. Journal of Applied Physics, 127(11), 113906. doi:10.1063/1.5115518en_AU
dc.identifier.issn0021-8979en_AU
dc.identifier.issn1089-7550en_AU
dc.identifier.issue11en_AU
dc.identifier.journaltitleJournal of Applied Physicsen_AU
dc.identifier.urihttps://doi.org/10.1063/1.5115518en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16057en_AU
dc.identifier.volume127en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherAIP Publishingen_AU
dc.subjectMagnetic materialsen_AU
dc.subjectAnisotropyen_AU
dc.subjectMagneto-optical effectsen_AU
dc.subjectRare earth compoundsen_AU
dc.subjectPerovskitesen_AU
dc.subjectSpin orientationen_AU
dc.subjectRare earthsen_AU
dc.subjectCrystallizationen_AU
dc.titleNon-zero spontaneous magnetic moment along crystalline b-axis for rare earth orthoferritesen_AU
dc.typeJournal Articleen_AU
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