Improvement of superconducting properties by high mixing entropy at blocking layers in BiS2-based superconductor REO0.5F0.5BiS2

1988 ◽

Vol 46 ◽

pp. 866-867

Author(s):

E. L. Hall ◽

A. Mogro-Campero ◽

L. G. Turner ◽

N. Lewis

Keyword(s):

Thin Film ◽

Thin Film Deposition ◽

Superconducting Films ◽

Electron Beam Evaporation ◽

Film Deposition ◽

Silicon Substrates ◽

Superconducting Properties ◽

Sequential Electron ◽

Thin Superconducting Films

There is great interest in the growth of thin superconducting films of YBa2Cu3Ox on silicon, since this is a necessary first step in the use of this superconductor in a variety of possible electronic applications including interconnects and hybrid semiconductor/superconductor devices. However, initial experiments in this area showed that drastic interdiffusion of Si into the superconductor occurred during annealing if the Y-Ba-Cu-O was deposited direcdy on Si or SiO2, and this interdiffusion destroyed the superconducting properties. This paper describes the results of the use of a zirconia buffer layer as a diffusion barrier in the growth of thin YBa2Cu3Ox films on Si. A more complete description of the growth and characterization of these films will be published elsewhere.Thin film deposition was carried out by sequential electron beam evaporation in vacuum onto clean or oxidized single crystal Si wafers. The first layer evaporated was 0.4 μm of zirconia.

Download Full-text

Processing and characterization of YBa2Cu3O7−x/Ag composites

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100173364 ◽

1990 ◽

Vol 48 (4) ◽

pp. 46-47

Author(s):

Jafar Javadpour ◽

Bradley L. Thiel ◽

Sarikaya Mehmet ◽

Ilhan A. Aksay

Keyword(s):

Composite System ◽

Precursor Solution ◽

Microstructural Development ◽

Superconducting Properties ◽

Practical Applications ◽

Nitrate Precursor ◽

Cold Pressed ◽

Tape Cast ◽

Composite Samples

Practical applications of bulk YBa2Cu3O7−x materials have been limited because of their inadequate critical current density (jc) and poor mechanical properties. Several recent reports have indicated that the addition of Ag to the YBa2Cu3O7−x system is beneficial in improving both mechanical and superconducting properties. However, detailed studies concerning the effect of Ag on the microstructural development of the cermet system have been lacking. Here, we present some observations on the microstructural evolution in the YBa2Cu3O7−x/Ag composite system.The composite samples were prepared by mixing various amounts (2.5 - 50 wt%) AgNO3 in the YBa2Cu3O7−x nitrate precursor solution. These solutions were then spray dried and the resulting powders were either cold pressed or tape cast. The microstructures of the sintered samples were analyzed using SEM (Philips 515) and an analytical TEM (Philips 430T).The SEM micrographs of the compacts with 2.5 and 50 wt% Ag addition sintered at 915°C (below the melting point of Ag) for 1 h in air are displayed in Figs. 1 and 2, respectively.

Download Full-text

Homogeneity of superconducting properties in SmBa2Cu3O7−δ-seeded melt processed YBCO

Materials Science and Engineering B ◽

10.1016/s0921-5107(98)00115-9 ◽

1998 ◽

Vol 53 (1-2) ◽

pp. 169-173 ◽

Cited By ~ 1

Author(s):

C Dewhurst

Keyword(s):

Superconducting Properties

Download Full-text

SUPERCONDUCTING PROPERTIES OF IRIDIUM THIN FILMS

Le Journal de Physique Colloques ◽

10.1051/jphyscol:19786274 ◽

1978 ◽

Vol 39 (C6) ◽

pp. C6-608-C6-609

Author(s):

L. B. Holdeman ◽

R. J. Soulen ◽

Jr ◽

T. F. Finnegan ◽

P. N. Peters

Keyword(s):

Thin Films ◽

Superconducting Properties

Download Full-text

MAGNETIC AND SUPERCONDUCTING PROPERTIES OF SUBSTITUTED YBa2 (Cu1-xMx)3 O7 COMPOUNDS (M = 3d METAL)

Le Journal de Physique Colloques ◽

10.1051/jphyscol:19888988 ◽

1988 ◽

Vol 49 (C8) ◽

pp. C8-2201-C8-2202

Author(s):

Ying-Chang Yang ◽

Yuan-Bo Zha ◽

Wei-Chun Yuan ◽

Jian Lan ◽

Zun-Xiao Liu ◽

...

Keyword(s):

Superconducting Properties

Download Full-text

Synthesis and superconducting properties of (Au) /CuTl-1223 composites

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2014.08.162 ◽

2015 ◽

Vol 618 ◽

pp. 110-114 ◽

Cited By ~ 15

Author(s):

Abdul Jabbar ◽

Irfan Qasim ◽

Khalid M. Khan ◽

Zulqurnain Ali ◽

K. Nadeem ◽

...

Keyword(s):

Superconducting Properties

Download Full-text

Superconducting Order Parameter Nucleation and Critical Currents in the Presence of Weak Stray Fields in Superconductor/Insulator/Ferromagnet Hybrids

Coatings ◽

10.3390/coatings11050507 ◽

2021 ◽

Vol 11 (5) ◽

pp. 507

Author(s):

Vasiliy N. Kushnir ◽

Serghej L. Prischepa ◽

Michela Trezza ◽

Carla Cirillo ◽

Carmine Attanasio

Keyword(s):

Phenomenological Theory ◽

Critical Currents ◽

Superconducting Phase ◽

Stray Field ◽

Superconducting Properties ◽

Ginzburg Landau ◽

Ferromagnetic Layers ◽

Linearized System ◽

Critical Current Density Jc ◽

Usadel Equations

The stray fields produced by ferromagnetic layers in Superconductor/Insulator/Ferromagnet (S/I/F) heterostructures may strongly influence their superconducting properties. Suitable magnetic configurations can be exploited to manipulate the main parameters of the hybrids. Here, the nucleation of the superconducting phase in an external magnetic field that periodically oscillates along the film width is studied on the base of the numerical solution of the linearized system of Usadel equations. In addition, the effect of the magnetic configuration of the F-layer on the temperature dependence of the critical current density, Jc(T), is investigated in the framework of the Ginzburg–Landau phenomenological theory on the base of the oscillating model of a stray field. By following this approach, the Jc(T) dependence of a Nb/SiO2/PdNi trilayer is reproduced for different magnetic configurations of the PdNi layer.

Download Full-text