Atomic scale superlattices consisting of copper- and cobalt-based oxides

Ichiro Tsukada; Masato Nose; Kunimitsu Uchinokura

doi:10.1117/12.250247

5 July 1996 Atomic scale superlattices consisting of copper- and cobalt-based oxides

Ichiro Tsukada, Masato Nose, Kunimitsu Uchinokura

Author Affiliations +

Proceedings Volume 2697, Oxide Superconductor Physics and Nano-Engineering II; (1996) https://doi.org/10.1117/12.250247
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

Heteroepitaxial growth has been studied with copper- and cobalt-based perovskite oxides using molecular beam epitaxy with purified ozone. At firs, oxidation of Co metal is investigated and its phase diagram under ozone ambient is experimentally determined. Next, we have tried to fabricate superlattices with two different combinations: Bi₂Sr₂CuO_6+(delta )/Bi₂Sr₂CoO_6.25 and SrCuO_2+(delta )/SrCoO_2.5. The former is revealed to be unsuitable for superlattice fabrication because of interdiffusion between Cu and Co, which is also confirmed in thicker bilayer films of Bi₂Sr₂Ca_n-1Cu_nO_2n+4+(delta )(n equals 1, 2, and 3) / Bi_{2$Sr(subscript m+1}Co_mO_y (m equals 1 and 2). In contrast, we can arrange B-site cations (Cu or Co) on an atomic-layer scale in the latter combination, in which we can change the B-site cations in every two layers.

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Ichiro Tsukada, Masato Nose, and Kunimitsu Uchinokura "Atomic scale superlattices consisting of copper- and cobalt-based oxides", Proc. SPIE 2697, Oxide Superconductor Physics and Nano-Engineering II, (5 July 1996); https://doi.org/10.1117/12.250247

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