Magnetic anisotropy and deep ultraviolet photoresponse characteristics in Ga2O3:Cr vermicular nanowire thin film nanostructure

Nanostructures of magnetic doping semiconductors have attracted considerable attention due to their fantastic electronic, optical and magnetic properties as well as their unique morphology for both interconnects and functional units in fabrication of nanodevices. Herein, a Ga2O3:Cr vermicular nanowire thin film nanostructure was obtained on α-Al2O3 (0001) substrates by pulsed laser deposition. The nanostructure exhibits room temperature anisotropic ferromagnetic behavior with an easy axis perpendicular to the film plane and a Curie temperature of higher than 400 K. An obvious deep ultraviolet photoelectric response was obtained in the formed nanostructure.

[1]  David J. Smith,et al.  Observation of ferromagnetism above 900 K in Cr-GaN and Cr-AlN , 2004, cond-mat/0402103.

[2]  Fei Zeng,et al.  Giant magnetic moment in an anomalous ferromagnetic insulator: Co-doped ZnO , 2006 .

[3]  Peter J. Pauzauskie,et al.  Crystallographic alignment of high-density gallium nitride nanowire arrays , 2004, Nature materials.

[4]  Hyoun-woo Kim,et al.  Characteristics of Ga2O3 nanomaterials grown on chromium substrates , 2006 .

[5]  Zhifu Liu,et al.  O2 and CO sensing of Ga2O3 multiple nanowire gas sensors , 2008 .

[6]  Zhong Lin Wang,et al.  Self-powered nanowire devices. , 2010, Nature nanotechnology.

[7]  S. Chang,et al.  ZnO photoconductive sensors epitaxially grown on sapphire substrates , 2007 .

[8]  Daqin Chen,et al.  Integrated broadband near-infrared luminescence in transparent glass ceramics containing γ-Ga2O3: Ni2+ and β-YF3: Er3+ nanocrystals , 2013 .

[9]  Fengmin Wu,et al.  High-performance single crystalline UV photodetectors of β-Ga2O3 , 2015 .

[10]  Weihua Tang,et al.  Fabrication of β-Ga_2O_3 thin films and solar-blind photodetectors by laser MBE technology , 2014 .

[11]  A. Adeyeye,et al.  Binary Ferromagnetic Nanostructures: Fabrication, Static and Dynamic Properties , 2013 .

[12]  H. Mohamed,et al.  Synthesis, structure and optical properties of single-crystalline In2O3 nanowires , 2013 .

[13]  S. Sampath,et al.  Exploiting oriented attachment in stabilizing La3+-doped gallium oxide nano-spindles , 2014 .

[14]  X. M. Wu,et al.  Structure and deep ultraviolet emission of Co-doped ZnO films with Co3O4 nano-clusters , 2010 .

[15]  Weihua Tang,et al.  Oxygen vacancy tuned Ohmic-Schottky conversion for enhanced performance in β-Ga2O3 solar-blind ultraviolet photodetectors , 2014 .

[16]  Andrea R. Gerson,et al.  Resolving surface chemical states in XPS analysis of first row transition metals, oxides and hydroxides: Sc, Ti, V, Cu and Zn , 2010 .

[17]  Patrik Schmuki,et al.  TiO2 nanotubes: synthesis and applications. , 2011, Angewandte Chemie.

[18]  X. Zhong,et al.  ZnO@TiO2 core–shell nanorod arrays with enhanced photoelectrochemical performance , 2013 .

[19]  Ichiro Yamada,et al.  Efficient Assembly of Bridged β‐Ga2O3 Nanowires for Solar‐Blind Photodetection , 2010 .

[20]  Thomas A. Kennedy,et al.  Doping semiconductor nanocrystals , 2005, Nature.

[21]  T. Klapwijk,et al.  A spin triplet supercurrent through the half-metallic ferromagnet CrO2 , 2006, Nature.

[22]  X. M. Chen,et al.  Effect of defects on room-temperature ferromagnetism of Cr-doped ZnO films , 2009 .

[23]  Weihua Tang,et al.  Room temperature ferromagnetism in (Ga1−xMnx)2O3 epitaxial thin films , 2015 .

[24]  Xingzhong Zhao,et al.  Direct Growth of Lateral ZnO Nanorod UV Photodetectors with Schottky Contact by a Single-Step Hydrothermal Reaction , 2010 .

[25]  Diandra L. Leslie-Pelecky,et al.  Magnetic Properties of Nanostructured Materials , 1996 .

[26]  P. Marcus,et al.  Fibronectin adsorption on Fe–Cr alloy studied by XPS , 2006 .

[27]  Jin Ma,et al.  Electrical and optical characterizations of β-Ga2O3:Sn films deposited on MgO (110) substrate by MOCVD , 2014 .