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Study of tilted orthorhombic twins and leakage current in epitaxial SmFeO_3 thin films

机译：SmFeO_3外延薄膜中斜方晶孪晶和漏电流的研究

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摘要

234102.1-234102.6%The effect of oxygen partial pressure (OPP) during deposition on the structural and ferroelectric properties of epitaxial SmFeO3 (SFO) thin films is studied in the present report. The thin films are deposited using the pulsed laser ablation method. Two (00l) oriented substrates, viz., LaAlO3 (LAO) and niobium doped SrTiO3 (Nb:STO), are used for the deposition of films with 35 and 170nm thicknesses at different OPP values. The prepared films are found to be of single phase and grow in the out-of-plane configuration SFO(hh0)/LAO(00l) using x-ray 2 and phi scans. The epitaxial relationship between the substrate and the film, domain twinning, is confirmed by reciprocal space map measurements. Films of higher thickness exhibit tilted twin structures, more prominently for the films prepared at lower OPP. A significant change in the leakage current is observed as a function of OPP, and the results are explained in terms of the microstructure of the films.
机译：234102.1-234102.6％本文研究了沉积过程中氧分压（OPP）对外延SmFeO3（SFO）薄膜的结构和铁电性能的影响。使用脉冲激光烧蚀方法沉积薄膜。两个（00l）取向的衬底，即LaAlO3（LAO）和铌掺杂的SrTiO3（Nb：STO），用于在不同的OPP值下沉积厚度分别为35和170nm的薄膜。发现制备的膜是单相的，并使用x射线2和phi扫描以平面外配置SFO（hh0）/ LAO（00l）生长。基板和薄膜之间的外延关系（畴孪晶）通过相互的空间图测量得到证实。较高厚度的薄膜表现出倾斜的孪晶结构，对于以较低OPP制备的薄膜更明显。观察到泄漏电流的显着变化是OPP的函数，并以薄膜的微观结构来解释结果。

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  • 来源
    《Journal of Applied Physics》 |2019年第23期|234102.1-234102.6|共6页
  • 作者

    Panchwanee Anjali; Reddy V. Raghavendra; Choudhary R. J.; Phase D. M.; Ganesan V.; Gupta Ajay;

  • 作者单位

    UGC DAE Consortium Sci Res, Univ Campus,Khandwa Rd, Indore 452001, Madhya Pradesh, India;

    UGC DAE Consortium Sci Res, Univ Campus,Khandwa Rd, Indore 452001, Madhya Pradesh, India;

    UGC DAE Consortium Sci Res, Univ Campus,Khandwa Rd, Indore 452001, Madhya Pradesh, India;

    UGC DAE Consortium Sci Res, Univ Campus,Khandwa Rd, Indore 452001, Madhya Pradesh, India;

    UGC DAE Consortium Sci Res, Univ Campus,Khandwa Rd, Indore 452001, Madhya Pradesh, India;

    Amity Univ, Amity Ctr Spintron Mat, Noida 201303, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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