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首页> 外文期刊>Materials Science and Engineering >Multiferroic properties of (Bi_(1-x)Pr_x)(Fe_0.95Mn_0.05)O-3 thin films
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Multiferroic properties of (Bi_(1-x)Pr_x)(Fe_0.95Mn_0.05)O-3 thin films

机译：（Bi_（1-x）Pr_x）（Fe_0.95Mn_0.05）O-3薄膜的多铁性

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摘要

The effects of Pr substitution on the structures, magnetism and electrical properties of Bi(Feo.95 Mn_0.05 )O-3 films are investigated systematically. X-ray diffraction and Raman spectra results confirm that a phase transition from rhombohedral to tetragonal structure occurs at about 15% Pr substitution. The X-ray photoelectron spectroscopy reveals that Fe~2+ in the films can be suppressed by Pr substitution. Enhanced ferromagnetism at room temperature is observed near the phase boundary composition. The increased remanent magnetization in the 15% Pr-substituted film can be understood by taking into account both the modification of the short-range canted G-type antiferromagnetic order at phase boundaries and the suppression of long-range incommensurate spin cycloid of BiFeO_3 due to Pr substitution. Meanwhile, large ferroelectric remanent polarization of un-doped BFO can be maintained when Pr concentration is less than 20%. With 15% Pr substitution, the film shows a large remanent polarization of 62 μC/cm~2 and a reduced coercive field of 217kV/cm. These results demonstrate that doped BFO films with compositions near phase boundary may be promising candidates for multifunctional applications due to the simultaneous exhibition of enhanced ferromagnetism and superior ferroelectric properties.
机译：考察了Pr取代对Bi（Feo.95 Mn_0.05）O-3薄膜结构，磁性和电学性能的影响。 X射线衍射和拉曼光谱结果证实，在约15％的Pr取代下发生了从菱面体到四方结构的相变。 X射线光电子能谱表明，Pr取代可抑制薄膜中的Fe〜2 +。在相界组成附近观察到室温下增强的铁磁性。可以通过考虑在相界处对短程倾斜G型反铁磁有序的修饰以及对BiFeO_3的长程不对称自旋摆线的抑制来考虑，来理解15％Pr取代膜中剩余磁化强度的增加。 Pr替代。同时，当Pr浓度小于20％时，可以保持未掺杂的BFO的大铁电剩磁。用15％的Pr取代后，该薄膜显示出62μC/ cm〜2的大剩余极化强度和217kV / cm的矫顽场。这些结果表明，由于同时显示出增强的铁磁性和优越的铁电性能，具有接近相界成分的掺杂BFO膜可能是多功能应用的有希望的候选物。

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  • 来源
    《Materials Science and Engineering》 |2011年第13期|p.990-995|共6页
  • 作者

    Zheng Wen; Lu You; Xuan Shen; Xuefei Li; Di Wu; Junling Wang; Aidong Li;

  • 作者单位

    National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering. Nanjing University, Nanjing 210093, China;

    School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore;

    National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering. Nanjing University, Nanjing 210093, China;

    National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering. Nanjing University, Nanjing 210093, China;

    National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering. Nanjing University, Nanjing 210093, China;

    School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore;

    National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering. Nanjing University, Nanjing 210093, China;

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  • 正文语种 eng
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  • 关键词

    ferroelectrics magnetically ordered materials phase transitions;

    机译：铁电磁性材料的相变;

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