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首页> 外文期刊>Journal of magnetism and magnetic materials >Surface morphology, ferromagnetic domains and magnetic anisotropy in BaFeO_(3-δ) thin films: Correlated structure and magnetism
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Surface morphology, ferromagnetic domains and magnetic anisotropy in BaFeO_(3-δ) thin films: Correlated structure and magnetism

机译：BaFeO_（3-δ）薄膜的表面形态，铁磁畴和磁各向异性：相关的结构和磁性

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摘要

We have studied the structure, the surface morphology, the magnetic domains and the magnetization of ferromagnetic BaFeO_(3-δ) (BFO) thin films deposited on single-crystal MgO (001) substrate. The BFO film is ferromagnetic-insulating at room temperature and shows a growth of self organized symmetric square-shaped structures of various length-scales on the surface. The film, after oxygen annealing, shows several pronounced modifications: (i) in addition to square structures, the pyramid-shaped structures also manifest on the surface, (ⅱ) the lattice parameter decreases indicating a change in the structure, (ⅲ) the magnetization isotherms show magnetic anisotropy with a five-fold increase in magnetic coercivity and two-fold increase in magnetic moment, and (ⅳ) a larger growth of the magnetic domains. These results demonstrate a strong influence of oxygen annealing on structural and magnetic properties of BFO films. Our results suggest that the structural and the magnetic properties are strongly correlated in BFO films, albeit with unaltered insulating state.
机译：我们研究了沉积在单晶MgO（001）衬底上的铁磁BaFeO_（3-δ）（BFO）薄膜的结构，表面形态，磁畴和磁化强度。 BFO膜在室温下是铁磁绝缘的，并且在表面上显示出各种长度尺度的自组织对称方形结构的生长。氧退火后的膜显示出几个明显的变化：（i）除正方形结构外，金字塔形结构还出现在表面上；（ⅱ）晶格参数降低，表明结构发生了变化；（ⅲ）磁化等温线显示出磁各向异性，其磁矫顽力增加了5倍，磁矩增加了2倍，并且（ⅳ）磁畴的增长更大。这些结果证明了氧退火对BFO膜的结构和磁性的强烈影响。我们的结果表明，尽管具有不变的绝缘状态，但BFO膜的结构和磁性能密切相关。

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  • 来源
    《Journal of magnetism and magnetic materials》 |2014年第4期|98-102|共5页
  • 作者

    Fozia Aziz; Parul Pandey; Mahesh Chandra; Amit Khare; D.S. Rana; K.R. Mavani;

  • 作者单位

    Discipline of Physics, Indian Institute of Technology Indore (IITI), Indore 452017, India;

    Indian Institute of Science Education and Research Bhopal (USER-Bhopal), Bhopal 462023, India;

    Discipline of Physics, Indian Institute of Technology Indore (IITI), Indore 452017, India;

    Indian Institute of Science Education and Research Bhopal (USER-Bhopal), Bhopal 462023, India;

    Indian Institute of Science Education and Research Bhopal (USER-Bhopal), Bhopal 462023, India;

    Discipline of Physics, Indian Institute of Technology Indore (IITI), Indore 452017, India,Surface Science and Engineering, Indian Institute of Technology Indore (IITI), Indore 452017, India;

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  • 正文语种 eng
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  • 关键词

    Ferromagnetic domains; Ferromagnetic thin films; Structural transformation; BaFeO_3;

    机译：铁磁畴;铁磁薄膜;结构转型;BaFeO_3;

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