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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Growth, structure, and properties of BiFeO3-BiCrO3 films obtained by dual cross beam PLD
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Growth, structure, and properties of BiFeO3-BiCrO3 films obtained by dual cross beam PLD

机译：双十字束PLD制得的BiFeO3-BiCrO3薄膜的生长，结构和性能

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摘要

The properties of epitaxial Bi2FeCrO6 thin films, recently synthesized by pulsed laser deposition, have partially confirmed the theoretical predictions (i.e., a magnetic moment of 2 mubeta per formula unit and a polarization of ~80 muC/cm2 at 0 K). The existence of magnetic ordering at room temperature for this material is an unexpected, but very promising, result that needs to be further investigated. Because magnetism is assumed to arise from the exchange interaction between the Fe and Cr cations, the magnetic behavior is strongly dependent on both their ordering and the distance between them. We present here the successful synthesis of epitaxial Bi2FexCryO6 (BFCO x/y) films grown on SrTiO3 substrates using dual crossed-beam, pulsed-laser deposition. The crystal structure of the films has different types of (111)-oriented superstructures, depending on the deposition conditions. The multiferroic character of BFCO (x/y) films is proven by the presence of both ferroelectric and magnetic hysteresis at room temperature. The oxidation state of Fe and Cr ions in the films is shown to be 3+ only, and the difference in macroscopic magnetization with Fe/Cr ratio composition could only be due to ordering of the Cr3+ and Fe3+ cations to the modification of the exchange interaction between them.
机译：最近通过脉冲激光沉积合成的外延Bi2FeCrO6薄膜的特性已部分证实了理论预测（即每个配方单位2μbeta的磁矩和0 K时的〜80μC/ cm2的极化）。这种材料在室温下的磁有序化是一个出乎意料的结果，但是非常有希望的结果需要进一步研究。因为假定磁性是由Fe和Cr阳离子之间的交换相互作用引起的，所以磁性行为强烈取决于它们的顺序和它们之间的距离。我们在这里介绍了使用双交叉光束，脉冲激光沉积在SrTiO3衬底上生长的外延Bi2FexCryO6（BFCO x / y）薄膜的成功合成。取决于沉积条件，膜的晶体结构具有不同类型的（111）取向的超结构。 BFCO（x / y）薄膜的多铁性特征已通过室温下铁电和磁滞现象的存在来证明。膜中Fe和Cr离子的氧化态仅显示为3+，并且宏观的磁化强度与Fe / Cr比组成的差异仅可能是由于Cr3 +和Fe3 +阳离子的排列顺序改变了交换相互作用它们之间。

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