Effects of annealing process on asymmetric coercivities of Mn-doped BiFeO3 thin films
Effects of annealing process on asymmetric coercivities of Mn-doped BiFeO3 thin films
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DOI：
10.1007/s00339-009-5366-0
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发表时间：
2009-08
期刊：
影响因子：
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通讯作者：
Zheng Wen;G. Hu;Changhong Yang;Weibing Wu
中科院分区：
文献类型：
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作者：
Zheng Wen;G. Hu;Changhong Yang;Weibing Wu
采用顺序层法（BFMOSLA）和常规退火法（BFMOCA）在氧化铟锡电极上制备了Mn掺杂量为5%的BiFeO 3（BFMO）薄膜。X射线光电子能谱结果表明，与BFMOCA薄膜相比，BFMOSLA薄膜中Fe ~（2+）的含量较低，从而导致BFMOSLA薄膜具有较大的反射极化。另一方面，研究了退火工艺对BFMO晶体非对称性的影响。我们发现，BFMO薄膜的非对称性应源于优先极化方向，薄膜的老化会使非对称性更加严重。
5% Mn-doped BiFeO3(BFMO) thin films were deposited onto indium tin oxide electrodes using the sequential layer (BFMOSLA) and the conventional (BFMOCA) annealing processes. X-ray photoelectron spectroscopy results reveal that, in comparison with the BFMOCAfilm, the BFMOSLAfilm has lower content of Fe2+, which in turn leads to the fact that a larger remanent polarization can be observed in the latter film. On the other hand, the effects of the annealing process on the asymmetry of coercivity in BFMO are investigated. We find that asymmetric coercivities of BFMO films should originate from the preferential polarization direction and the aging of the films can render the asymmetry more severe.