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首页> 外文期刊>Materials Science and Engineering >Enhancement of magnetic and ferroelectric properties of BiFeO_3 by Er and transition element (Mn, Co) co-doping
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Enhancement of magnetic and ferroelectric properties of BiFeO_3 by Er and transition element (Mn, Co) co-doping

机译：Er和过渡元素（Mn，Co）共掺杂增强BiFeO_3的磁和铁电性能

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摘要

BiFeO_3(BFO), Bi_(0.8)Er_(0.2)FeO_3 (BEFO), Bi_(0.8)Er_(0.2)Fe_(0.9)Mn_(0.1)O_3 (BEFMO) and Bi_(0.8)Er_(0.2)Fe_(0.9)Co_(0.1)O_3(BEFCO) nanoparticles were prepared by sol-gel method having an average size of 200 nm for BFO, under100nm for BEFO and under 60 nm for BEFMO and BEFCO. Phase transition from a rhombohedral symmetry (R3c) for BFO to an orthorhombic symmetry (Ibmm) for BEFO, BEFMO and BEFCO has been observed. The phase transformation combined with size reduction has significantly improved both ferroelectric and ferromagnetic behaviors of the doped samples in a similar way. The formation of dipolar defect complexes (DDCs) in the doped samples also contributes to the improved ferroelectric property with saturated polarization (Ps) of 0.375 μC/cm~2 and remanent polarization (Pr) of 0.244 μC/cm~2 for BEFMO. Size effect may also impact the simultaneously developed Pr for BEFMO and BEFCO. Owning to the interactions between the ferromagnetic and antiferromagnetic microdomains, improved saturated magnetization (Ms) and remanent magnetization (Mr) are also observed in BEFMO.
机译：BiFeO_3（BFO），Bi_（0.8）Er_（0.2）FeO_3（BEFO），Bi_（0.8）Er_（0.2）Fe_（0.9）Mn_（0.1）O_3（BEFMO）和Bi_（0.8）Er_（0.2）Fe_（0.9）通过溶胶-凝胶法制备了Co_（0.1）O_3（BEFCO）纳米粒子，其BFO的平均尺寸为200nm，BEFO的平均尺寸为100nm以下，而BEFMO和BEFCO的平均尺寸为60nm以下。已经观察到从BFO的菱面体对称（R3c）到BEFO，BEFMO和BEFCO的斜方对称（Ibmm）的相变。相变结合尺寸减小以相似的方式显着改善了掺杂样品的铁电和铁磁性能。掺杂样品中偶极缺陷复合物（DDC）的形成也有助于改善铁电性能，其中BEFMO的饱和极化（Ps）为0.375μC/ cm〜2，剩余极化（Pr）为0.244μC/ cm〜2。尺寸效应也可能影响同时开发的BEFMO和BEFCO的Pr。由于铁磁和反铁磁微区之间的相互作用，在BEFMO中还观察到了改善的饱和磁化强度（Ms）和剩余磁化强度（Mr）。

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  • 来源
    《Materials Science and Engineering》 |2014年第10期|26-30|共5页
  • 作者

    Yumin Han; Weiwei Mao; Chuye Quan; Xingfu Wang; Jianping Yang; Tao Yang; Xingao Li; Wei Huang;

  • 作者单位

    Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), School of Materials Science and Engineering (SMSE), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China;

    Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), School of Materials Science and Engineering (SMSE), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China, School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China;

    Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), School of Materials Science and Engineering (SMSE), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China;

    Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), School of Materials Science and Engineering (SMSE), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China, School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China;

    School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China;

    Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), School of Materials Science and Engineering (SMSE), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China;

    Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), School of Materials Science and Engineering (SMSE), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China;

    Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), School of Materials Science and Engineering (SMSE), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China;

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  • 正文语种 eng
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  • 关键词

    BiFeO_3; Nanoparticles; Sol-gel method; Phase transformation; Ferroelectric; Ferromagnetic;

    机译：BiFeO_3;纳米颗粒;溶胶-凝胶法相变;铁电;铁磁;

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