Effect of defects on room-temperature ferromagnetism of Cr-doped ZnO films

2009 ◽  
Vol 60 (4) ◽  
pp. 214-217 ◽  
Author(s):  
L.J. Zhuge ◽  
X.M. Wu ◽  
Z.F. Wu ◽  
X.M. Chen ◽  
Y.D. Meng
Keyword(s):  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Zno Films ◽  
Doped Zno

Ferromagnetic and Optical Properties of Partially Cu-Doped ZnO Films

2009 ◽  
Vol 64 (11) ◽  
pp. 765-768 ◽  
Author(s):  
Fan-Yong Ran ◽  
Masaki Tanemura ◽  
Yasuhiko Hayashi ◽  
Norihiro Ide ◽  
Masao Imaoka ◽  
...  
Keyword(s):  
Optical Properties ◽  
Room Temperature ◽  
Ion Irradiation ◽  
Ion Beam ◽  
Room Temperature Ferromagnetism ◽  
Intrinsic Property ◽  
Zno Films ◽  
Cu Doping ◽  
Partial Area ◽  
Doped Zno

Wurtzite structure ZnO films (3×3 mm2) with a partial-area Cu doping were successfully prepared using a micro-area Ar+-ion beam (~ 380 μm in diameter) and a simultaneous Cu supply at room temperature. A Cu2O phase was formed in the ZnO films by Cu doping. The partially Cu-doped ZnO films exhibited room-temperature ferromagnetism (RTFM) with a saturation magnetization of 1.6×10−5 emu and a coercive field of 40 Oe. Since Zn, Cu, and their compounds are not ferromagnetic, the observed RTFMis attributed to the intrinsic property of Cu-doped ZnO films. As confirmed by the low temperature photoluminescence (PL) spectra, no serious optical damage was recognized in the region without Ar+-ion irradiation. Thus, it was believed that the micro-area Ar+-ion irradiation with a simultaneous Cu supply was promising to integrate the magnetic and optical properties of ZnO-based materials.

Room-temperature ferromagnetism of Cu-doped ZnO films deposited by helicon magnetron sputtering

2009 ◽  
Vol 246 (6) ◽  
pp. 1243-1247 ◽  
Author(s):  
Fan-Yong Ran ◽  
Masao Imaoka ◽  
Masaki Tanemura ◽  
Yasuhiko Hayashi ◽  
Tun-Seng Herng ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Zno Films ◽  
Doped Zno

Robust room temperature ferromagnetism and band gap tuning in nonmagnetic Mg doped ZnO films

2017 ◽  
Vol 399 ◽  
pp. 751-757 ◽  
Author(s):  
Zhiyong Quan ◽  
Xia Liu ◽  
Yan Qi ◽  
Zhilin Song ◽  
Shifei Qi ◽  
...  
Keyword(s):  
Band Gap ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Zno Films ◽  
Doped Zno ◽  
Band Gap Tuning ◽  
Mg Doped

Carrier Concentration Effect of Cu-Doped ZnO Films for Room Temperature Ferromagnetism

2012 ◽  
Vol 51 (10R) ◽  
pp. 103003 ◽  
Author(s):  
Zhiwei Ai ◽  
Hao Wu ◽  
Ying Lin ◽  
Zhongpo Zhou ◽  
Sheng Wang ◽  
...  
Keyword(s):  
Carrier Concentration ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Concentration Effect ◽  
Zno Films ◽  
Doped Zno

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.

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