采用射频磁控溅射在玻璃衬底上制备了BiFeO3薄膜,通过透射光谱和椭圆光谱研究了氧分压对BiFeO3薄膜能带结构及光学性能的影响.结果表明,BiFeO3薄膜在近红外区具有良好的透射性,透射率均在80%以上,其禁带宽度Eg=(2.79±0.03)eV.随着氧分压的增大,BiFeO3薄膜中氧缺陷及氧缺陷能级减少,导致透射率和禁带宽度均增大.同时发现,OJL色散模型与Cauchy色散模型的叠合能够对BiFeO3薄膜的椭圆光谱进行很好的描述.
参考文献
[1] | Wang J;Neaton J B;Zheng H et al.[J].Science,2003,299:1719-1722. |
[2] | Li S;Lin Y H;Nan C W et al.[J].Journal of Applied Physics,2009,105(05):4310-4314. |
[3] | Wang Y P;Zhou L;Liu J M et al.[J].Applied Physics Letters,2004,84:1731-1733. |
[4] | 杨彩霞,林殷茵,汤庭鳌.溶胶-凝胶法制备BiFeO3铁电薄膜的结构和特性[J].功能材料,2005(03):340-342,345. |
[5] | Ma Y;Chen X M .[J].Journal of Applied Physics,2009,105(05):4107-4111. |
[6] | Zhu W M;Guo H Y;Ye Z G .[J].Physical Review B:Condensed Matter,2008,78(01):4401-4410. |
[7] | Fiebig M;Lottermoser T;Frohlich D et al.[J].Nature,2002,419:818-820. |
[8] | Kimura T;Goto T;Shintani H et al.[J].Nature,2003,426:55-58. |
[9] | Kubel F;Schmid H .[J].Acta Crystallographica Section B:Structural Science,1990,46:698-702. |
[10] | Kiselev S V;Ozerov R P;Zhdanov G S .[J].Soviet Mathematics Doklady,1962,7:742. |
[11] | Chu Y H;Martin L W;Holcomb M B et al.[J].Materials Today,2007,10:16-23. |
[12] | Basu S R;Martin L W;Chu Y H et al.[J].Applied Physics Letters,2008,92(09):1905-1907. |
[13] | Ihlefeld J F;Kumar A;Gopalan V et al.[J].Applied Physics Letters,2007,91(07):1922-1924. |
[14] | Kumar A;Rai R C;Podraza N J et al.[J].Applied Physics Letters,2008,92(12):1915-1917. |
[15] | V. R. Palkar;J. John;R. Pinto .Observation of saturated polarization and dielectric anomaly in magnetoelectric BiFeO_(3) thin films[J].Applied physics letters,2002(9):1628-1630. |
[16] | Tauc J;Grigorovici R;Vancu A .[J].Phys Satus Solid,1966,15:627-637. |
[17] | Clark S J;Robertson J .[J].Applied Physics Letters,2007,90(13):2903-2905. |
[18] | Iliopoulos E;Adikimenakis A;Giesen C et al.[J].Applied Physics Letters,2008,92(19):1907-1909. |
[19] | Bruggeman D A G .[J].Annals of Physics,1935,24:636-699. |
[20] | Oleary SK.;Lim PK.;Johnson SR. .THE RELATIONSHIP BETWEEN THE DISTRIBUTION OF ELECTRONIC STATES AND THE OPTICAL ABSORPTION SPECTRUM OF AN AMORPHOUS SEMICONDUCTOR - AN EMPIRICAL ANALYSIS[J].Journal of Applied Physics,1997(7):3334-3340. |
[21] | Smith DY.;Karstens W.;Inokutil M. .A generalized Cauchy dispersion formula and the refractivity of elemental semiconductors[J].Journal of Physics. Condensed Matter,2001(17):3883-3893. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%