Co(II), Co(II)+Mn(II), Co(II)+Ni(II) Co-doping Effects on Tris(thiourea)zinc(II) Sulphate Crystals: A Comparative Study

2015 ◽  
Vol 623 (1) ◽  
pp. 179-193 ◽  
Author(s):  
M. Rajasekar ◽  
K. Meena ◽  
K. Muthu ◽  
G. Bhagavannarayana ◽  
SP. Meenakshisundaram
Keyword(s):  
Comparative Study ◽  
Co Doping ◽  
Doping Effects

A Sims Study of Electroluminescent Phosphors: SrS:Cu

1999 ◽  
Vol 560 ◽  
Author(s):  
Lily H. Zhang ◽  
Larry Wang ◽  
Wusheng Tong ◽  
YongBao Xin
Keyword(s):  
Material Characterization ◽  
Secondary Ion Mass Spectrometry ◽  
Dopant Concentration ◽  
Thermal Quenching ◽  
Areal Density ◽  
Device Performance ◽  
Cell Temperature ◽  
Co Doping ◽  
Doping Effects ◽  
Secondary Ion

ABSTRACTThis study has used secondary ion mass spectrometry (SIMS) as a technique for thin film EL material characterization. It has shown that the Cu dopant concentration in the SrS films directly correlates with the luminescent brightness of the EL devices. A series of SrS:Cu,Y were grown using MBE to study the Y co-doping effects. It has been found that Y peak concentration and areal density in the SrS increased as the Y evaporation cell temperature was increased. The maximum PL intensity was found in the sample grown in the middle of the Y cell temperature range used. The Y co-doping has shown to reduce the thermal quenching effects in SrS EL devices. Therefore, in this series of samples, a good correlation has been found between Y and Cu concentration and the EL device performance characteristics.

Co-doping effects of Pb and La in (Bi,Pb)2(Sr,La)2CuOy

2004 ◽  
Vol 412-414 ◽  
pp. 230-234 ◽  
Author(s):  
T. Amano ◽  
M. Tange ◽  
M. Yokoshima ◽  
T. Kizuka ◽  
S. Nishizaki ◽  
...  
Keyword(s):  
Co Doping ◽  
Doping Effects

A comparative study on In-doping effects for MOVPE GaN films on Si(111) and sapphire substrates

2003 ◽  
Vol 0 (7) ◽  
pp. 2562-2565 ◽  
Author(s):  
A. Yamamoto ◽  
T. Tanikawa ◽  
Bablu K. Ghosh ◽  
Y. Hamano ◽  
A. Hashimoto ◽  
...  
Keyword(s):  
Comparative Study ◽  
Sapphire Substrates ◽  
In Doping ◽  
Doping Effects

Diode pumped visible Dy3+-doped silica fiber laser: Ge-co-doping effects on lasing efficiency and photodarkening

2021 ◽  
Author(s):  
Tomoya Okazaki ◽  
Chiaki Otsuka ◽  
Edson Haruhico Sekiya ◽  
Kota Kawai ◽  
Masato Mizusaki ◽  
...  
Keyword(s):  
Slope Efficiency ◽  
Rayleigh Scattering ◽  
Maximum Output Power ◽  
Silica Fiber ◽  
Maximum Output ◽  
Laser Oscillation ◽  
Scattering Loss ◽  
Co Doping ◽  
Doping Effects ◽  
Diode Pumped

Abstract We present the first demonstration of visible laser oscillation in the Dy3+-doped silica fiber pumped by a 451nm InGaN laser diode. It was found that Ge-co-doping plays the following important roles of laser oscillation: (1) to reduce the Rayleigh scattering loss, (2) to suppress the X-ray-induced and pump-induced photodarkening (PD), and (3) to increase lasing slope efficiency. In a fiber with 0.46wt% Dy, 1.8 wt% Ge, and 0.54wt% Al, the slope efficiency is 22.0 % at 582.5 nm, and the maximum output power is 18.4 mW.

Co doping effects on structural, electronic and magnetic properties in Mn2VGa

2012 ◽  
Vol 324 (7) ◽  
pp. 1463-1467 ◽  
Author(s):  
Qing Fang Li ◽  
Hao Feng Zhao ◽  
Xia Zhong ◽  
Jun Liang Su
Keyword(s):  
Magnetic Properties ◽  
Electronic And Magnetic Properties ◽  
Co Doping ◽  
Doping Effects

La and Co doping effects on magnetoresistance of double perovskite Sr2FeMoO6

2015 ◽  
Vol 29 (20) ◽  
pp. 1550140 ◽  
Author(s):  
SongChol Ri ◽  
GwangSu Kim
Keyword(s):  
Magnetic Field ◽  
Doping Concentration ◽  
Magnetic Measurements ◽  
Double Perovskite ◽  
High Energy ◽  
X Ray Diffraction ◽  
Co Doping ◽  
Maximum Value ◽  
Doping Effects ◽  
Low Magnetic Field

Double perovskite Sr 2 FeMoO 6 (SFMO) with composition of Sr 2-x La x Fe 1-y Co y MoO 6(x = 0, 0.1, 0.2, 0.3, 0.4, 0.5 at.%; y = 0, 0.05, 0.1, 0.2, 0.3, 0.5, 0.9 at.%) was synthesized by high energy ball milling and sintering. The sintered samples were investigated by means of X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and magnetic measurements. XRD results show that all the samples have single phase double perovskite structure. EDS spectrum confirmed that the actual composition of prepared samples is in agreement with nominal ones. With the increase of doping concentration of La, the magnetization decreases, whereas Curie temperature increases in SFMO. And with doping concentration of La, the magnetoresistance (MR) ratio with a low magnetic field of 480 kA/m increases, has its maximum value as 5% for x = 0.3 at 293 K. The degree of antisite disorder decreases with Co 2+ doping, and therefore results in increase of MR ratio. At room temperature, the MR ratio with a considerable low magnetic field for x = 0.3, y = 0.1 has maximum value as 6.5%.

CO-doping effects on the transport and magnetic properties of FeTe

2016 ◽  
Vol 397 ◽  
pp. 1-5 ◽  
Author(s):  
Yanglin Zhu ◽  
Li Li ◽  
Zhaorong Yang ◽  
Zhitao Zhang ◽  
Bin Yuan ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Co Doping ◽  
Doping Effects
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