Creating thin magnetic layers at the surface of Sb2Te3 topological insulators using a low-energy chromium ion beam

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dc.contributor.authorCortie, DLen_AU
dc.contributor.authorZhao, WYen_AU
dc.contributor.authorYue, Zen_AU
dc.contributor.authorLi, Zen_AU
dc.contributor.authorBake, Aen_AU
dc.contributor.authorMarenych, Oen_AU
dc.contributor.authorPastuovic, Zen_AU
dc.contributor.authorNancarrow, Men_AU
dc.contributor.authorZhang, ZMen_AU
dc.contributor.authorQi, DCen_AU
dc.contributor.authorEvans, PJen_AU
dc.contributor.authorMitchell, DRGen_AU
dc.contributor.authorWang, XLen_AU
dc.date.accessioned2025-01-09T03:35:01Zen_AU
dc.date.available2025-01-09T03:35:01Zen_AU
dc.date.issued2020-05-11en_AU
dc.date.statistics2024-04-11en_AU
dc.description.abstractThe surfaces of Sb2Te3 topological insulator crystals were implanted using a 40 keV chromium ion beam. To facilitate uniform doping, the Sb2Te3 was passivated with a thin TiO2 film before the implantation step. The resulting chemical structure was studied using atomic-resolution transmission electron microscopy. A fluence of 7 × 1015 ions/cm2 at 40 keV lead to amorphization of the Sb2Te3 surface, with chromium predominantly incorporated in the amorphous layer. Heating to 200 °C caused the amorphous region to recrystallize and led to the formation of a thin chromium-rich interfacial layer. Near-edge x-ray absorption spectroscopy indicates a uniform valence state of Cr3+ throughout, with no evidence of metallic clustering. High-temperature superparamagnetic behavior was detected up to 300 K, with an increased magnetic moment below 50 K. © 2020 Author(s).en_AU
dc.identifier.articlenumber192410.en_AU
dc.identifier.citationCortie, D., Zhao, W., Yue, Z., Li, Z., Bake, A., Marenych, O., Pastuovic, Z., Nancarrow, M., Zhang, Z., Qi, D.-C., Evans, P., Mitchell, D. R. G., & Wang, X. (2020). Creating thin magnetic layers at the surface of Sb2Te3 topological insulators using a low-energy chromium ion beam. Applied Physics Letters, 116(19), 192410. doi:10.1063/5.0006447en_AU
dc.identifier.issn0003-6951en_AU
dc.identifier.issn1077-3118en_AU
dc.identifier.issue19en_AU
dc.identifier.journaltitleApplied Physics Lettersen_AU
dc.identifier.urihttps://doi.org/10.1063/5.0006447en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15866en_AU
dc.identifier.volume116en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherAIP Publishingen_AU
dc.subjectThin Filmsen_AU
dc.subjectIon beamsen_AU
dc.subjectCrystal dopingen_AU
dc.subjectChromiumen_AU
dc.subjectChromium base alloysen_AU
dc.subjectMagnetic materialsen_AU
dc.subjectLayersen_AU
dc.subjectElectrical insulatorsen_AU
dc.subjectEpitaxyen_AU
dc.subjectTransmission electron microscopyen_AU
dc.titleCreating thin magnetic layers at the surface of Sb2Te3 topological insulators using a low-energy chromium ion beamen_AU
dc.typeJournal Articleen_AU
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