Ion-beam irradiation of lanthanum compounds in the systems La2O3–Al2O3 and La2O3–TiO2

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dc.contributor.authorWhittle, KRen_AU
dc.contributor.authorLumpkin, GRen_AU
dc.contributor.authorBlackford, MGen_AU
dc.contributor.authorAughterson, RDen_AU
dc.contributor.authorSmith, KLen_AU
dc.contributor.authorZaluzec, NJen_AU
dc.date.accessioned2010-11-01T01:20:01Zen_AU
dc.date.available2010-11-01T01:20:01Zen_AU
dc.date.issued2010-10en_AU
dc.date.statistics2010-10en_AU
dc.description.abstractThin crystals of La2O3, LaAlO3, La2/3TiO3, La2TiO5, and La2Ti2O7 have been irradiated in situ using 1 MeV Kr2+ ions at the Intermediate Voltage Electron Microscope-Tandem User Facility (IVEM-Tandem), Argonne National Laboratory (ANL). We observed that La2O3 remained crystalline to a fluence greater than 3.1×1016 ions cm−2 at a temperature of 50 K. The four binary oxide compounds in the two systems were observed through the crystalline–amorphous transition as a function of ion fluence and temperature. Results from the ion irradiations give critical temperatures for amorphisation (Tc) of 647 K for LaAlO3, 840 K for La2Ti2O7, 865 K for La2/3TiO3, and 1027 K for La2TiO5. The Tc values observed in this study, together with previous data for Al2O3 and TiO2, are discussed with reference to the melting points for the La2O3–Al2O3 and La2O3–TiO2 systems and the different local environments within the four crystal structures. Results suggest that there is an observable inverse correlation between Tc and melting temperature (Tm) in the two systems. More complex relationships exist between Tc and crystal structure, with the stoichiometric perovskite LaAlO3 being the most resistant to amorphisation. © 2010, Elsevier Ltd.en_AU
dc.identifier.citationWhittle, K. R., Lumpkin, G. R., Blackford, M. G., Aughterson, R. D., Smith, K. L., & Zaluzec, N. J. (2010). Ion-beam irradiation of lanthanum compounds in the systems La2O3-Al2O3 and La2O3-TiO2. Journal of Solid State Chemistry, 183(10), 2416-2420. doi:10.1016/j.jssc.2010.07.033en_AU
dc.identifier.govdoc2964en_AU
dc.identifier.issn0022-4596en_AU
dc.identifier.issue10en_AU
dc.identifier.journaltitleJournal of Solid State Chemistryen_AU
dc.identifier.pagination2416-2420en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jssc.2010.07.033en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2784en_AU
dc.identifier.volume183en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectLanthanumen_AU
dc.subjectIrradiationen_AU
dc.subjectIon beamsen_AU
dc.subjectANLen_AU
dc.subjectCrystal structureen_AU
dc.subjectMelting pointsen_AU
dc.titleIon-beam irradiation of lanthanum compounds in the systems La2O3–Al2O3 and La2O3–TiO2en_AU
dc.typeJournal Articleen_AU
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