Magnetic and Transport Properties of Anatase TiO2 Codoped with Fe and Nb

スポンサーリンク

概要

• 論文の詳細を見る

• We have measured the magnetic and transport properties of FexNbyTi1-x-yO2-\delta ($x = 0.06$, $y = 0$, 0.1, 0.03) films deposited by pulsed laser deposition at various partial oxygen pressures ($P_{\text{O\scale70%$_{2}$}}$). The Fe and Nb codoped films have a carrier concentration of ${>}3\times 10^{20}$ cm-3, which is independent of $P_{\text{O\scale70%$_{2}$}}$ and far exceeds the critical carrier concentration for ferromagnetic ordering in Fe0.06Ti0.94O2-\delta ($1\times 10^{19}$ cm-3). Room-temperature ferromagnetism was observed only when deposition was conducted in reducing atmospheres (i.e., $P_{\text{O\scale70%$_{2}$}}\leq 1\times 10^{-6}$ Torr) for all the FexNbyTi1-x-yO2-\delta films, indicating that there is a critical oxygen vacancy density for the ferromagnetic transition.

• 2010-04-25

著者

• HIROSE Yasushi

  Kanagawa Academy of Science and Technology (KAST)

• HASEGAWA Tetsuya

  Kanagawa Academy of Science and Technology (KAST)

• Hirose Yasushi

  Kanagawa Academy Of Science And Technology

• Shimada Toshihiro

  Univ. Tokyo Tokyo Jpn

• Sakai Enju

  Graduate School of Science, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan

• Chikamatsu Akira

  Graduate School of Science, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan

• Hirose Yasushi

  Graduate School of Science, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan

• Shimada Toshihiro

  Graduate School of Science, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan

• Hasegawa Tetsuya

  Graduate School of Science, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan

• Sakai Enju

  Graduate School Of Science The University Of Tokyo

• Chikamatsu Akira

  Graduate School Of Science The University Of Tokyo

関連論文

• High magnetic field effect in organic light emitting diodes
• Electronic Band Structure of Transparent Conductor : Nb-Doped Anatase TiO_2
• Temperature-Dependent Soft X-ray Photoemission and Absorption Studies of Charge Disproportionation in La_Sr_xFeO_3(Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
• Low-temperature Fabrication of Transparent Conducting Anatase Nb-doped TiO_2 Films by Sputtering
• Preparation of Layered-Rhombohedral LiCoO_2 Epitaxial Thin Films Using Pulsed Laser Deposition
• Fabrication of TiO_2-Based Transparent Conducting Oxide Films on Glass by Pulsed Laser Deposition
• Enhancement of Magneto-Optical Properties of Anatase Co:TiO_2 Co-Doped with Nb
• Magnetic Properties of Rutile Ti_Fe_xO_2 Epitaxial Thin Films
• Magnetic Domain Structures Governed by Granular Morphology in La_Sr_MnO_3 Thin Films as Probed by Low-Temperature Magnetic Force Microscopy
• Quantitative Conductivity Mapping of SrTiO_3-LaAlO_3-LaTiO_3 Ternary Composition-Spread Thin Film by Scanning Microwave Microscope
• Direct Observation of Interlayer Josephson Vortices in Heavily Pb-Doped Bi_2Sr_2CaCu_2O_y by Scanning Superconducting Quantum Interference Device Microscopy
• Heteroepitaxial Growth of Rutile TiO_2 on GaN(0001) by Pulsed Laser Deposition
• Mg_xZn_O-Based Schottky Photodiode for Highly Color-Selective Ultraviolet Light Detection
• Plasma-assisted Molecular Beam Epitaxy of High Optical Quality MgZnO Films on Zn-polar ZnO Substrates
• High Electron Mobility Exceeding 10^4cm^2V^ s^ in Mg_xZn_O/ZnO Single Heterostructures Grown by Molecular Beam Epitaxy
• Systematic analysis of ARPES spectra of transition-metal oxides: nature of effective d band
• Enhanced Carrier Transport in Uniaxially (001)-Oriented Anatase Ti0.94Nb0.06O2 Films Grown on Nanosheet Seed Layers
• High Mobility Exceeding 80 cm2 V-1 s-1 in Polycrystalline Ta-Doped SnO2 Thin Films on Glass Using Anatase TiO2 Seed Layers
• Magnetic and Transport Properties of Anatase TiO2 Codoped with Fe and Nb
• Wet Etching of TiO2-Based Precursor Amorphous Films for Transparent Electrodes
• Sputter Deposition of High-Mobility Sn1-xTaxO2 Films on Anatase-TiO2-Coated Glass
• High-Throughput Screening of Ultraviolet-Visible Magnetooptical Properties of Spinel Ferrite (Zn, Co)Fe_2O_4 Solid Solution Epitaxial Film by a Composition-Spread Approach
• Uniaxial Alignment of Alq_3 by Laser-Assisted Molecular Beam Epitaxy
• Crystallization Kinetics of Amorphous Sputtered Nb-Doped TiO_2 Thin Films
• Enhanced Carrier Generation in Nb-Doped SnO Thin Films Grown on Strain-Inducing Substrates
• Fabrication of Nb-Doped TiO2 Transparent Conducting Films by Postdeposition Annealing under Nitrogen Atmosphere
• Enhanced Carrier Generation in Nb-Doped SnO_2 Thin Films Grown on Strain-Inducing Substrates
• Direct Observation of Interlayer Josephson Vortices in Heavily Pb-Doped Bi2Sr2CaCu2Oy by Scanning Superconducting Quantum Interference Device Microscopy
• Ta-doped Anatase TiO2 Epitaxial Film as Transparent Conducting Oxide
• Enhancement of Magneto-Optical Properties of Anatase Co:TiO2 Co-Doped with Nb
• Magnetotransport Properties of Fe/Pentacene/Co:TiO2 Junctions with Fe Top Contact Electrodes Prepared by Thermal Evaporation and Pulsed Laser Deposition
• Fabrication of TiO2-Based Transparent Conducting Oxide Films on Glass by Pulsed Laser Deposition
• Fabrication of Low Resistivity Nb-doped TiO2 Transparent Conductive Polycrystalline Films on Glass by Reactive Sputtering

もっと見る 閉じる

スポンサーリンク