Modelling of structural domains and elastic strain calculation in rhombohedral La1−x Sr x MnO3 films on (110) SrTiO3

Modelling of structural domains and elastic strain calculation in rhombohedral La1−x Sr x MnO3 films on (110) SrTiO3
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(110) SrTiO3 上菱形 La1âx Sr x MnO3 薄膜的结构域建模和弹性应变计算

DOI:
10.1080/14786430600993331
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发表时间:
2007
影响因子:
1.6
通讯作者:
A. E. Romanov
A. E. Romanov
中科院分区:
材料科学3区
文献类型:
--
作者:
N. Farag;M. Bobeth;W. Pompe;A. E. Romanov

文献摘要

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正如文献中所报道的,在(110)SrTiO 3上的(110)取向菱面体La 1 − xSrxMnO 3(LSMO)薄膜中的结构畴显示出具有交替畴宽和倾斜畴壁的图案。建立了一个合适的一维周期畴模型,并应用相干缺陷法计算了相干生长薄膜中的非均匀应变场。应变在畴壁和薄膜/衬底界面的交界处急剧峰值。通过最小化弹性能和畴壁能之和,确定了平衡畴宽比和畴斑周期对膜厚的依赖关系。与衬底相比,所提出的畴结构只能在膜的晶体结构数据的一定范围内形成。编制了相应的LSMO组成依赖结构数据。
As reported in the literature, structural domains in (110) oriented rhombohedral La1−xSrxMnO3(LSMO) films on (110) SrTiO3show a pattern with alternating domain widths and inclined domain walls. An appropriate one-dimensional periodic domain model was developed and the non-uniform strain field in a coherently grown film was calculated by applying the coherency-defect approach. The strain is sharply peaked at the junction of the domain walls and the film/substrate interface. The dependence of the equilibrium domain-width ratio and domain-pattern period on film thickness was determined by minimizing the sum of elastic and domain-wall energies. The proposed domain structure can be formed only in a certain range of the film's crystal-structure data compared to the substrate. Corresponding composition-dependent structure data of LSMO are compiled.
DOI: 10.4028/www.scientific.net/ssp.87.265
发表时间: 2002
期刊: Solid State Phenomena
影响因子: --
作者:
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通讯作者: A. Romanov
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发表时间: 2005-03
期刊: physica status solidi (a)
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发表时间: 2002
期刊: Solid State Phenomena
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La1−xSrxMnO3 中的磁性和结构转变:T-x 相图
DOI: 10.1134/1.567873
发表时间: 1998
期刊: Journal of Experimental and Theoretical Physics Letters
影响因子: --
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