Bi-2223/Bi-2234 superlattice: its structural analysis and superconducting transition temperature

Takeshi Hatano; Kazuo Kadowaki; Keikichi G. Nakamura

doi:10.1117/12.179173

29 June 1994 Bi-2223/Bi-2234 superlattice: its structural analysis and superconducting transition temperature

Takeshi Hatano, Kazuo Kadowaki, Keikichi G. Nakamura

Proceedings Volume 2157, Superconducting Superlattices and Multilayers; (1994) https://doi.org/10.1117/12.179173
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

(2223)₂/(2234)₂ superlattices have been synthesized by three target sequential sputter deposition of BiO, SrCu_0.5O_1.5 and CaCuO₂ layers. The superstructure formed was analyzed in atomic layer scale by using some X-ray diffraction technique, such as interference of X-ray specular reflection, observation of the Laue's function pattern and a quantitative analysis of intergrowth. The superlattice, thus confirmed in the atomic layer scale, has a superconducting transition temperature (T_c) as high as the average of monophasic 2223 and 2234 films. The resistivity showed a similar angular dependence on the magnetic field orientation even at the temperature higher than the T_c of 2234. These results will be discussed by the hole diffusion and/or the proximity effect between the 2223 and 2234 layers.

Citation Download Citation

Takeshi Hatano, Kazuo Kadowaki, and Keikichi G. Nakamura "Bi-2223/Bi-2234 superlattice: its structural analysis and superconducting transition temperature", Proc. SPIE 2157, Superconducting Superlattices and Multilayers, (29 June 1994); https://doi.org/10.1117/12.179173

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