Abstract
Zn1-xNixO nanorod arrays were prepared on Si substrates by magnetron sputtering and hydrothermal methods at 100 °C. We studied the effects of doped concentration and hydrothermal growth conditions on the crystal structure, morphology, photoluminescence, and magnetic properties of Zn1-xNixO nanorod arrays. The research results show that the Zn1-xNixO nanorod have the hexagonal wurtzite structure without the appearance of the second phase, and all samples have a highly preferred orientation of a (002) crystal face. The Zn1-xNixO nanorod arrays exhibit obvious room temperature ferromagnetism with saturation magnetization at 4.2 × 10−4 emu/g, the residual magnetization is 1.3 × 10−4 emu/g and the coercive field is 502 Oe, and also excellent luminescent properties with seven times greater luminous intensity than that of ZnO nanorod arrays. The redshift of the ultraviolet emission peak was found by Ni2+ doping. We further explained the source and essence of the magnetic properties of Zn1-xNixO nanorod arrays and deemed that the magnetic moment mainly comes from the hybrid electron exchange of O 2p and Ni 3d state.
Highlights
Metal oxide semiconductor materials with a good optical, electrical, and chemical stability are studied deeply in application aspects of energy storage, photoelectrochemistry, and sensors [1,2,3,4]
Samanta et al [37] prepared Zn1-xNixO nanoparticles by the chemical synthesis method, and the results proved the existence of sample magnetism and the coupling between dielectric properties and magnetoelectricity (ME)
The crystal phase of the Zn1-xNixO nanorod arrays was investigated by an X-ray diffractometer (XRD, Bruker Advance D8, Bruker Corporation, Karlsruhe, Germany) using Cu Kα radiation operated at 40 kV and 30 mA in the diffraction angle range of 20–80◦ with a scanning rate of 6 deg/min and a step size of 0.02◦
Summary
Metal oxide semiconductor materials with a good optical, electrical, and chemical stability are studied deeply in application aspects of energy storage, photoelectrochemistry, and sensors [1,2,3,4]. Since the Dietl group [5] proposed the room temperature ferromagnetism of transition metal doped ZnO in their early theoretical work, doped ZnO has attracted widespread attention This kind of material has been predicted to have great application prospects in spin Field Effect Transistor (FET), spin Light Emitting Diode (LED), and spin Resonant Tunneling Diode (RTD) because of their unique properties in magneto-optic and magneto-electric fields [5,6,7,8,9,10,11]. The electronic structure of the magnetic and optical properties of Zn1-xNixO nanorods arrays were systematically studied by the spin polarization density functional theory, and the magnetic coupling mechanism and magnetic source of Zn1-xNixO nanorods arrays were analyzed, so as to provide an experimental and theoretical basis for the experimental preparation of high quality and high temperature superconductivity (Tc) ZnO magnetic nanorods materials
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
