Experimental investigations and analysis for high‐quality Nb/Al‐AlOx/ Nb Josephson junctions

ABSTRACTHigh resolution adsorption isotherms, temperature programmed desorption (TPD), x-ray diffraction (XRD) and x-ray absorption near edge spectroscopy (XANES) methods were used to investigate the interaction of SO2 with high quality MgO powders. The results of these investigations indicate that when SO2 is deposited on MgO in monolayer quantities at temperatures near 100K both SO3 and SO4 species form that are not removed by simply pumping on the pre-dosed samples at room temperature. TPD and XANES studies indicate that heating of pre-dosed MgO samples to temperatures above 350 °C is required for full removal of the SO3/SO4 species. XANES measurements made as a function of film thickness indicate for coverages near monolayer completion that the SO4 species form first.

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Fabrication of high quality Nb/AlO/sub x/-Al/Nb Josephson junctions. I. Sputtered Nb films for junction electrodes

IEEE Transactions on Applied Superconductivity ◽

10.1109/77.124922 ◽

1992 ◽

Vol 2 (1) ◽

pp. 1-14 ◽

Cited By ~ 57

Author(s):

T. Imamura ◽

T. Shiota ◽

S. Hasuo

Keyword(s):

Josephson Junctions ◽

High Quality

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Method and Device of Pyrolytic Processing of Pulp and Paper Industry’ Waste into High-Quality Synthesis Gas

Ecology and Industry of Russia ◽

10.18412/1816-0395-2018-11-4-9 ◽

2018 ◽

Vol 22 (11) ◽

pp. 4-9

Author(s):

V.M. Zaitchenko ◽

K.O. Krysanova ◽

V.A. Lavrenov

Keyword(s):

Synthesis Gas ◽

High Efficiency ◽

Paper Industry ◽

Fixed Bed ◽

Pulp And Paper Industry ◽

Processing Parameters ◽

Pulp And Paper ◽

Raw Material ◽

Experimental Investigations ◽

High Quality

Paper presents the results of the experimental investigations of the pulp and paper industry’ wood waste processing method into high-quality synthesis gas. The main characteristics of feedstock (moisture and ash content, elemental composition, higher and lower heating values, volatile matter and fixed carbon content) and synthesis gas (yield, chemical composition, heating value and tar content) in dependence of the processing parameters are described. Processing is carried out by the two-stage pyrolytic conversion method, combining pyrolysis and subsequent high-temperature cracking of volatiles in the charcoal fixed bed. The principal scheme and results of the thermotechnical characteristics calculation of the pilot plant capacity of 300 kg/h of raw material (mechanical mixture of wood chips and bark with a moisture content of 48 %) are presented. The obtained results confirm the high efficiency of the method as applied to the processing of this type of waste.

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Intrinsic Josephson Junctions on High-quality BSCCO-2212/2223 Superlattice Thin Films Grown by MOCVD

MRS Proceedings ◽

10.1557/proc-689-e5.19 ◽

2001 ◽

Vol 689 ◽

Author(s):

K. Endo ◽

H. Sato ◽

T. Yoshizawa ◽

K. Abe ◽

J. Itoh ◽

...

Keyword(s):

Magnetic Field ◽

Thin Films ◽

Field Dependence ◽

Josephson Junctions ◽

Magnetic Field Dependence ◽

High Quality ◽

Mesa Structure ◽

Intrinsic Josephson Junctions ◽

The Magnetic Field ◽

Number Of Branches

ABSTRACTWe report on the successful preparation of intrinsic Josephson junctions on high-quality BSCCO-2212/2223 superlattice thin films grown by MOCVD. The surface of as-grown films was very smooth with the roughness of the order of a half unit cell. Mesas were effectively structured on the film by the liquid-nitrogen-cooled dry etching method. A typical I-V characteristic in the c-axis direction of a BSCCO film shows the hysteresis and multiple resistive branches. The number of branches is consistent with that of junctions calculated from the height of a mesa structure. This indicates that BSCCO-2212/2223 superlattice films consist of a series array of S(CuO2 bilayer) / I(SrO, BiO layers) / S(CuO2 trilayer) junction. The formation of stacked Josephson junctions was also confirmed by the temperature dependence and the magnetic field dependence of Ic.

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