Strain modulated optical properties in BiFeO3 thin films

H. L. Liu, M. K. Lin, Y. R. Cai, C. K. Tung, Y. H. Chu

研究成果: 雜誌貢獻文章

30 引文 斯高帕斯(Scopus)


Spectroscopic ellipsometry was used to investigate the strain-dependent optical properties of BiFeO3 thin films. At room temperature, the compressively strained BiFeO3/LaAlO3 thin films show the largest band gap of about 3.12 eV. It redshifts to 2.75 eV for the tensile strained BiFeO3/NdScO3 thin films. With increasing temperature, observable anomalies in the band gap for all strained thin films near 640 K indicate that antiferromagnetic transition temperature is independent of strain and close to its bulk value, which are in good agreement with the first-principles calculations. These results further suggest a complex nature of charge-spin coupling in multiferroic BiFeO3 thin films.

期刊Applied Physics Letters
出版狀態已發佈 - 2013 十月 28

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

指紋 深入研究「Strain modulated optical properties in BiFeO<sub>3</sub> thin films」主題。共同形成了獨特的指紋。

  • 引用此

    Liu, H. L., Lin, M. K., Cai, Y. R., Tung, C. K., & Chu, Y. H. (2013). Strain modulated optical properties in BiFeO3 thin films. Applied Physics Letters, 103(18), [181907].