Bio21 - Research Publications

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    Large, Controllable Spikes of Magnetoresistance in La2/3Ca1/3MnO3/SrTiO3 Superlattices
    Fedoseev, SA ; Pan, AV ; Rubanov, S ; Golovchanskiy, IA ; Shcherbakova, OV (AMER CHEMICAL SOC, 2013-01)
    We have investigated superlattices consisting of up to 30 epitaxial nanomultilayers (3-7 nm thick) of ferromagnetic La(2/3)Ca(1/3)MnO(3) (LCMO) and insulating SrTiO(3) (STO) hybrids. The superlattices demonstrate dramatic shifts of Curie temperature, indicating the possibility of its tunability. The metal-insulator transition (MIT) has been observed around 140 K. Below the MIT temperature, the superlattices have shown sharp drops of resistivity, facilitating the largest and sharpest magnetoresistance peaks (>2000%) ever observed in LCMO films and superlattices at low temperatures. The observed experimental results can be explained in the frame of the phase separation model in manganites with well-organized structures. The results of magnetic and transport measurements of such hybrid structures are discussed, indicating a magnetodielectric effect in STO interlayers. The magnetic and transport properties of the superlattices are shown to be technology-dependent, experiencing dimensional transitions, which enables the creation of structures with prescribed magnetoresistance characteristics for a broad range of applications.
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    Fabrication and electrical characterization of three-dimentional graphitic microchannels in single crystal diamond
    Picollo, F ; Gatto Monticone, D ; Olivero, P ; FAIRCHILD, BARBARA ; RUBANOV, SERGEY ; PRAWER, STEVEN ; Vittone, E ( 2012)
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    Structural and chemical changes during ion beam synthesis of Fe nanoclusters on silicon nitride
    Kennedy, ; Leveneur, ; Metson, ; Williams, ; Rubanov, S ; Markiwtz, (International Conference on Advanced Materials, 2012)