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

Published

January 12, 2009

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

Pub Type

Journals

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 October 11, 2025)