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Structural and thermoelectric properties of Bi2Sr2Co2Oy thin films on LaAlO3 (100) and fused silica substrates

Published

Author(s)

Winnie K. Wong-Ng, Mark D. Vaudin, Shufang Wang, L Venimadhav, Shengming Guo, Ke Chen, Qi Li, A Soukiassian, D.G. Schlom, X.Q. Pan, D.G. Cahill, X. X. Xi

Abstract

We have grown Bi2Sr2Co2Oy thin films on LaAlO3 (100) and fused silica substrates by pulsed laser deposition. The films on LaAlO3 are c-axis oriented and partially in-plane aligned with multiple domains while the films on fused silica are preferred c-axis oriented without in-plane alignment. The Seebeck coefficient and resistivity of films on both substrates are comparable to those of single crystals. A large nonlinear resistivity related to the suppression of the spin density wave by external electric field was also observed. An oxide p-n heterojunction was formed by depositing Bi2Sr2Co2Oy film on Nb-doped SrTiO3 single crystal, which showed a rectifying behavior. These thin films and heterostructures may be used for novel thermoelectric applications.
Citation
Applied Physics Letters
Volume
94
Issue
2

Keywords

Bi2Sr2Co2Oy films on LaAlO3 (100), texture, thermoelectric properties, PLD, oxide p-n junction

Citation

Wong-Ng, W. , Vaudin, M. , Wang, S. , Venimadhav, L. , Guo, S. , Chen, K. , Li, Q. , Soukiassian, A. , Schlom, D. , Pan, X. , Cahill, D. and Xi, X. (2009), Structural and thermoelectric properties of Bi2Sr2Co2Oy thin films on LaAlO3 (100) and fused silica substrates, Applied Physics Letters (Accessed March 19, 2024)
Created January 12, 2009, Updated February 19, 2017