Qincong Feng

Properties of MgB2 films deposited on single crystal Ag layers

Z.H. Liu, Yuan-Hao WEI, Chao Zhang, Qincong Feng et autres

cn (code pays fourni par la source)

A sol–gel method for growing superconducting MgB2films

Lizhe Chen, Chengfei Zhang, Yue Wang, Yi Wang et autres

In this paper we report a new sol–gel method for the fabrication of MgB 2 films. Polycrystalline MgB 2 films were prepared by spin-coating a precursor solution of Mg(BH 4 ) 2 diethyl ether on (001)Al 2 O 3 substrates followed with …

cn (code pays fourni par la source)

Upper critical field and Raman spectra of MgB2 thin films irradiated with low energy oxygen ion

J. Wang, C G Zhuang, Jie Li, Y. Z. Wang et autres

The structure, upper critical field, and Raman spectrum of epitaxial MgB2 thin films irradiated by 300 keV O2+ ions have been investigated. Lattice parameter c expands after irradiation. There is a significant increase in upper critical field in the moderately irradiated films, …

cn (code pays fourni par la source)

MgO platelets and high critical field in MgB2thin films doped with carbon from methane

Ye Zhu, Frank Hunte, C G Zhuang, Qincong Feng et autres

We report that C-doped MgB 2 thin films deposited by hybrid physical–chemical vapor deposition (HPCVD) using CH 4 as the carbon source have H c2 (0 K)∼60 T, similar to that of HPCVD films obtained using (MeCp) 2 Mg for the carbon. …

us, cn (code pays fourni par la source)

A comparative study of the dendritic avalanche in MgB2 thin films synthesized by pulsed laser deposition and hybrid physical chemical vapor deposition methods

Jae-Yeap Lee, Hu-Jong Lee, Sung‐Ik Lee, C G Zhuang et autres

It is known that MgB2 thin films synthesized by using hybrid physical chemical vapor deposition (HPCVD) do not show dendritic avalanche, which is in contrast to those prepared by using pulsed laser deposition (PLD). To find the cause that makes the difference …

kr, cn, us (code pays fourni par la source)

Enhancement of critical current density and flux pinning in oxygen ion-irradiated MgB2thin films

Jian Wang, C G Zhuang, Jie Li, Z W Wu et autres

The effects of 300 keV O 2 + ion irradiation on the temperature and magnetic field dependence of the critical current density ( J C ) in high quality epitaxial MgB 2 thin films have been studied. Upon irradiation, the critical temperature …

cn (code pays fourni par la source)

Ultrahigh current-carrying capability in clean MgB2 films

C. G. Zhuang, Sheng Meng, C. Y. Zhang, Qincong Feng et autres

We have studied the current-carrying capability of high quality epitaxial MgB2 films synthesized using the hybrid physical-chemical vapor deposition technique by both transport measurement in nanobridge constrictions and magnetization measurement. An extremely high self-field critical current density Jc(0)>108A∕cm2, approaching the theoretical depairing …

cn, us (code pays fourni par la source)

High upper critical field and irreversibility field in MgB2 coated-conductor fibers

V. Ferrando, P. Orgiani, A. V. Pogrebnyakov, J. Chen et autres

We report on structural and superconducting properties of round MgB2 coated-conductor fibers deposited by hybrid physical-chemical vapor deposition on SiC fibers. The coating is polycrystalline and composed of elongated crystallites with dimensions less than 1μm in length and 0.2μm in width. The …

us, it, cn (code pays fourni par la source)

EFFECT OF ANNEALING TREATMENT ON THE STRUCTURE OF CdS FILMS

G.B.Liu, W.L.Wang, Cun Hu, Kejun Liao et autres

The effect of annealing treatment on the structure of CdS films was investigated.The cadmium sulfide thin films were prepared by chemical bath deposition, and were annealed at nitrogen atmosphere at different temperatures. The films were characterized by SEM and XPS (X-ray photoelectron …

Preparation of superconducting HgBa2CaCu2Ox films with a zero-resistance transition temperature of 121 K

Jian Guo, G. C. Xiong, Dapeng Yu, Qincong Feng et autres

cn (code pays fourni par la source)

CORRELATION AMONG THE ELECTRONIC STATE IN Sn -DOPED YBCO SYSTEM

Hao Zhang, Shiping Feng, Qincong Feng, Xiaolu Zhu

We have performed an X-ray photoelectron spectroscopy investigation on single-phase samples of Sn -doped YBCO system, together with structure analysis, oxygen content analysis, and superconductivity measurements. The experiment gave evidence that there is a strong correlation between the electronic states of copper …

cn (code pays fourni par la source)

XPS SPECTRA OF Y-Ba-Cu-O AND ITS DOPED SYSTEMS

Hao Zhang, S.Q. Feng, Qincong Feng, Xiaolu Zhu

An XPS study was carried out on the samples of pure Y-Ba-Cu-O and its doped systems. The experiment gave several important results about the electronic states of Y-Ba-Cu-O system. First, the presence of Cu 3+ oxidation state has correlation with the oxygen …

cn (code pays fourni par la source)