Fabrication of Zinc-oxide/Manganite Heterostructures and Novel p-n Junctions

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560026
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: Mie University
• Principal Investigator: ENDO Tamio 三重大学, 工学(系)研究科(研究院), 特任教授(継続雇用) (80115691)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: マンガン系酸化物 / 酸化亜鉛 / ヘテロp-n接合 / 電圧電流整流 / スイッチング / ヒステリシス / 光電流増幅

Outline of Final Research Achievements

Novel hetero p-n junctions of p-La(Ba)MnO3/n-ZnO were fabricated. They have step-terrace morphology and excellent crystallinity. Their orientations can be interpreted by calculations of lattice matching and site Coulomb energy. The junction shows I-V rectification and unique temperature dependence, and 200000 rectification factor after running-current. It also shows switching and hysteresis I-V behaviors. These are interpreted by percolation model due to ferromagnetic grains in LBMO. It shows large photo-induced current amplification, interpreted by phase change.

Free Research Field

総合理工