Now showing items 1-10 of 65
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Influence of diamagnetic Pb doping on the crystal structure and multiferroic properties of the BiFeO3 perovskite
Author(s):Zhang, Xingquan; Sui, Yu; Wang, Xianjie; Tang, Jinke; Su, Wenhui
Structural, magnetic, and electrical properties of Bi1−xPbxFeO3 (x=0, 0.1, 0.2, and 0.3) polycrystalline prepared by solid solution route were studied. The crystal structure data obtained from x-ray diffraction indicate ...
Pulsed laser deposition of Mn doped CdSe quantum dots for improved solar cell performance
Author(s):Dai, Qilin; Sabio, E. M.; Wang, Wenyong; Tang, Jinke
In this work, we demonstrate (1) a facile method to prepare Mn doped CdSe quantum dots (QDs) on Zn2SnO4 photoanodes by pulsed laser deposition and (2) improved device performance of quantum dot sensitized solar cells of ...
Large low-field tunneling magnetoresistance of CrO2/(CrO2∕Cr2O3) powder compact with two coercivities, A
Author(s):Wang, Jingping; Che, Ping; Feng, Jing; Lu, Minfeng; Liu, Jianfen; Meng, Jian; Hong, Yuanjia; Tang, Jinke
Two channels of the conductance G exist in cold-pressed powder compacts of CrO2/(CrO2/Cr2O3), where two types of granules have different coercivities. One of the channels is the spin-dependent intergranular tunneling ...
Magnetic and transport properties of NiMnAl thin films
Author(s):Vovk, Andriy; Yu, Minghui; Malkinski, Leszek; O’Connor, Charles; Wang, Zhenjun; Durant, Eden; Tang, Jinke; Golub, Vladimir
The magnetic and transport properties of Ni2MnAl thin films prepared using pulse laser deposition were investigated. It was shown that the films are granular and multiphase. Contrary to the data reported earlier we observe ...
Enhanced tunneling magnetoresistance of Fe3O4 in a Fe3O4-hexabromobenzene (C6Br6) composite system
Author(s):Wang, Wendong; He, Jibao; Tang, Jinke
Magnetotransport of Fe3O4-hexabromobenzene C6Br6 composite has been studied. Powders of C6Br6 and Fe2O3 nanoparticles were mixed together. They were annealed in hydrogen flow. There was a phase transformation from Fe2O3 ...
Amplification of magnetoresistance of magnetite in an Fe3O4–SiO2–Si structure
Author(s):Wang, Xianjie; Sui, Yu; Tang, Jinke; Wang, Cong; Zhang, Xingquan; Lu, Zhe; Liu, Zhiguo; Su, Wenhui; Wei, Xiankui; Yu, Richeng
Film of Fe3O4 was prepared with laser molecular beam epitaxy deposition on a Si substrate with a native SiO2 layer. When the temperature is increased above 250 K, the resistance drops rapidly because the conduction path ...
Weak localization and magnetoresistance of island-like thin copper films
Author(s):Dai, Jianbiao; Tang, Jinke
We report magnetotransport and weak localization effects in island-like thin copper films. The samples show significant negative magnetoresistance (NMR) when a perpendicular magnetic field (H˔0.25 T) is applied. When the ...
Optical Waveguide Lightmode Spectroscopy (OWLS) as a Sensor for Thin Film and Quantum Dot Corrosion
Author(s):Tang, Jinke; Yu, Hao; Eggleston, Carrick M.; Chen, Jiajun; Wang, Wenyong; Dai, Qilin
Optical waveguide lightmode spectroscopy (OWLS) is usually applied as a biosensor system to the sorption-desorption of proteins to waveguide surfaces. Here, we show that OWLS can be used to monitor the quality of oxide ...
Magnetoresistance in glass-coated Fe–Ni–Cu microwires
Author(s):Wang, K.-Y.; Feng, L.; O’Connor, C. J.; Tang, Jinke; Chen, D.-X.; Vazquez, M.; Hernando, A.
Glass-coated Fe–Ni–Cu microwires were prepared by Taylor's technique. X-ray diffraction data show patterns corresponding to fcc Cu. Negative magnetoresistance has been observed, which reaches 8.15% at 77 K and 6.35% at 300 ...
Preparation and magnetic properties of La0.9Ca0.1MnO3 nanoparticles at 300 °C
Author(s):Ji, Tianhao; Fang, Jiye; Golob, Volodymyr; Tang, Jinke; O'Connor, Charles J.
Nanosized La0.9Ca0.1MnO3 perovskite-type crystalline complex oxides have been prepared at the low calcination temperature of 300 °C. The preparation procedure was carried out by the two-step process of amorphous formation ...