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Interfaces and functional oxydes

Scientific highlights

Direct Evidence of Fe2+/Fe3+ Charge Ordering in the Ferrimagnetic Hematite-Ilmenite Fe1.35Ti0.65O3-d Thin Films

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Here we report on the direct experimental evidence of Fe2+/Fe3+ charge ordering at room temperature in hematite-ilmenite Fe1.35Ti0.65O3-d epitaxial thin films grown by pulsed laser deposition, using aberration-corrected scanning transmission electron microscopy (STEM) coupled to high-resolution energy electron-loss spectroscopy (EELS). Read more »

Chemical Imaging at Atomic Resolution To Refine the Local Structure of Nanocrystals

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Ce2Zr2O8 nanocrystals are characterized by aberration-corrected electron microscopy, core-loss electron energy-loss spectroscopy, and simulations. Read more »

Publications

Gloter, A., et al. Atomically resolved mapping of EELS fine structures. Materials Science in Semiconductor Processing 65, 2 - 17 (2017). Download: 1-s2.0-S1369800116302165-main.pdf (5.7 MB)
Popova, E., et al. Interplay between epitaxial strain and low dimensionality effects in a ferrimagnetic oxide. Journal of Applied Physics 121, (2017). Download: Popova_JAP2017_Strain-STEM-GPA.pdf (4.49 MB)
Inan Akmehmet, G., et al. Structure and Luminescence in Long Persistence Eu, Dy, and B Codoped Strontium Aluminate Phosphors: The Boron Effect. Journal of the American Ceramic Society n/a - n/a (2016).doi:10.1111/jace.14188 Download: Akmehmet_et_al-2016-Journal_of_the_American_Ceramic_Society.pdf (505.64 KB)
Chen, S.-Y., et al. Concentration Dependence of Oxygen Vacancy on the Magnetism of CeO 2 Nanoparticles. The Journal of Physical Chemistry C 116, 8707 - 8713 (2012).
Deboudt, K., Gloter, A., Mussi, A. & Flament, P. Red-ox speciation and mixing state of iron in individual African dust particles. Journal of Geophysical Research 117, (2012).
Bocher, L., et al. Atomic and Electronic Structure of the BaTiO 3 /Fe Interface in Multiferroic Tunnel Junctions. Nano Letters 12, 376 - 382 (2012). Download: Bocher-Nanoletters12.pdf (2.76 MB)
Yang, M., Baik, H., Ivanovskaya, V.V., Colliex, C. & Benayad, A. O K-energy loss near-edge structure change induced by tantalum impurity in monoclinic hafnium oxide. Journal Of Applied Physics 109, 053723 (2011).
Valencia, S., et al. Interface-induced room-temperature multiferroicity in BaTiO3. Nature Materials 10, 753 - 758 (2011). Download: Valencia_NatMat11_XMCD-BTOFe.pdf (761.54 KB)
Garcia, V., et al. Ferroelectric Control of Spin Polarization. Science 327, 1106–1110 (2010). Download: Garcia_Science10_ferroelectric_LSMO-BTO-Fe.pdf (400.27 KB)
Sefrioui, Z., et al. All-Manganite Tunnel Junctions with Interface-Induced Barrier Magnetism. Advanced Materials 22, 5029–+ (2010).
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