Microstructure and properties of sol-gel-derived (La,Sr)CoO3 thin film with compositional fluctuation La/Sr ratio

Wei Lu; Ping Zheng; Zhongyan Meng; Wenbiao Wu

doi:10.1117/12.607621

8 December 2004 Microstructure and properties of sol-gel-derived (La,Sr)CoO₃ thin film with compositional fluctuation La/Sr ratio

Wei Lu, Ping Zheng, Zhongyan Meng, Wenbiao Wu

Author Affiliations +

Proceedings Volume 5774, Fifth International Conference on Thin Film Physics and Applications; (2004) https://doi.org/10.1117/12.607621
Event: Fifth International Conference on Thin Film Physics and Applications, 2004, Shanghai, China

Abstract

Thin films of Lanthanum strontium cobalite [(La_1-xSr_x)CoO₃, LSCO] were directly spin-coated onto SiO₂/Si (1 0 0) substrates with compositional fluctuation La/Sr ratio, followed by rapid thermal annealing (RTA). The effects of different La/Sr ratios on the microstructure, surface morphology and electrical properties of the films were examined by X-ray diffraction (XRD), scanning electrical microscopy (SEM) and four probe measurements, respectively. The results indicate that the thin film displays a structure transform from rhombohedral phase to cubic phase around x=0.5, and that the resistivity of the thin film decreases with the increase of La/Sr ratio at the first, then increase slightly. A minimum value of resistivity of LSCO appears at x=0.5. In addition, the effect of the annealing temperature on the electrical properties of La_0.5Sr_0.5CoO₃ films is discussed.

Citation Download Citation

Wei Lu, Ping Zheng, Zhongyan Meng, and Wenbiao Wu "Microstructure and properties of sol-gel-derived (La,Sr)CoO₃ thin film with compositional fluctuation La/Sr ratio", Proc. SPIE 5774, Fifth International Conference on Thin Film Physics and Applications, (8 December 2004); https://doi.org/10.1117/12.607621

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available