Room-temperature Ferromagnetism in Nanostructured Co-doped ZnO

2005 ◽  
Vol 877 ◽  
Author(s):  
M. Wei ◽  
N. Khare ◽  
K. A. Yates ◽  
D. Zhi ◽  
J. L. MacManus-Driscoll
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Chemical Vapour ◽  
Zno Films ◽  
Transmission Electron Microscopy Analysis ◽  
Transmission Electron ◽  
Doped Zno ◽  
Co Doped

AbstractNanosized Co-doped ZnO samples were synthesized using an ultrasonic spray assisted chemical vapour deposition method. Microstructural and magnetic properties of these samples were studied. The room-temperature ferromagnetism was observed in the Co-doped ZnO. Also, x-ray analysis revealed a wurtzite ZnO structure with a small change of the lattice constants due to the doping of Co in ZnO. Raman spectroscopy of the Co-doped ZnO films indicated direct substitution of Co. Scanning electron microscopy showed nanostructured Co-doped ZnO with a ring or cup shape. Transmission electron microscopy analysis revealed nano grains within the rings of an average diameter of around 10 nm. Both energy dispersive spectroscopy and energy-filtered transmission electron microscopy indicated a uniform distribution of Co.

scholarly journals Defects in paramagnetic Co-doped ZnO films studied by transmission electron microscopy

2013 ◽  
Vol 114 (24) ◽  
pp. 243503 ◽  
Author(s):  
A. Kovács ◽  
A. Ney ◽  
M. Duchamp ◽  
V. Ney ◽  
C. B. Boothroyd ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Zno Films ◽  
Transmission Electron ◽  
Doped Zno ◽  
Co Doped

Room temperature ferromagnetism in Co-doped ZnO films synthesized by magnetron sputtering

2015 ◽  
Vol 27 (2) ◽  
pp. 24112
Author(s):  
吴兆丰 Wu Zhaofeng ◽  
程鲲 Cheng Kun ◽  
张峰 Zhang Feng
Keyword(s):  
Magnetron Sputtering ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Zno Films ◽  
Doped Zno ◽  
Co Doped

Al and Ni co-doped ZnO films with room temperature ferromagnetism, low resistivity and high transparence

2011 ◽  
Vol 126 (3) ◽  
pp. 797-803 ◽  
Author(s):  
Mingpeng Yu ◽  
Hong Qiu ◽  
Xiaobai Chen ◽  
Hui Li ◽  
Wei Gong
Keyword(s):  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Zno Films ◽  
Low Resistivity ◽  
Doped Zno ◽  
Co Doped

Raman spectroscopic studies of oxygen defects in Co-doped ZnO films exhibiting room-temperature ferromagnetism

2006 ◽  
Vol 19 (2) ◽  
pp. 026212 ◽  
Author(s):  
C Sudakar ◽  
P Kharel ◽  
G Lawes ◽  
R Suryanarayanan ◽  
R Naik ◽  
...  
Keyword(s):  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Spectroscopic Studies ◽  
Zno Films ◽  
Raman Spectroscopic ◽  
Oxygen Defects ◽  
Doped Zno ◽  
Co Doped

Nanometric AlNi Precipitation in a 84.68 wt.% Cu-11.25 wt.%Al-4.07 Wt%Ni Shape Memory Alloy

2013 ◽  
Vol 334-335 ◽  
pp. 1-6
Author(s):  
Khaled Hamouda ◽  
S.M. Chentouf ◽  
M. Bouabdallah ◽  
H. Cheniti ◽  
N. Amimer
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Room Temperature ◽  
Nominal Composition ◽  
Transmission Electron Microscopy Analysis ◽  
Transmission Electron ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis

A shape memory alloy with a nominal composition of 84.68 wt.% Cu-11.25 wt.%Al-4.07 wt.%Ni, has been studied. Polycrystalline specimens have been quenched into water at room temperature, after heat treatment of 15 minutes at a high temperature of 1123 K. Two successive cycles from room temperature to 923 K and inversely have been performed on the non equilibrium samples. The microstructural study presented in this work has been performed using TEM (Transmission Electron Microscopy) analysis, STEM (Scanning Transmission Electron Microscopy) analysis, X-ray diffraction analysis at a variable temperature. Nanometric phase precipitation of AlNi type was observed to appear in this alloy.

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