Ordering in (La,Sr)(Al,Ta)O_3 substrates

H. Li; L. Salamanca-Riba; R. Ramesh; J.H. Scott

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Ordering in (La,Sr)(Al,Ta)O_3 substrates

机译：在（La，Sr）（Al，Ta）O_3基板中订购

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(La, Sr)(Al, Ta)O_3 (LSAT) has recently received increased attention as a substrate for the deposition of various oxide films. LSAT is usually considered as having a perovskite structure. However, the exact atomic structure of LSAT is not yet well known and has received little attention up to now. In this paper, a series of studies using x-ray diffraction, transmission electron microscopy, and energy dispersive spectrometry were conducted to determine the atomic structure of LSAT. It was found that LSAT consists of two types of domains: one with a simple cubic perovskite structure (disordered with a = 0.3868 nm) and the other with a face-centered-cubic structure (ordered with a = 0.773 nm). Computer image simulation of high-resolution lattice images suggests that the ordered structure is due to ordering of the Al and Ta ions.

机译：作为沉积各种氧化物膜的衬底，（La，Sr）（Al，Ta）O 3（LSAT）最近受到越来越多的关注。 LSAT通常被认为具有钙钛矿结构。然而，LSAT的确切原子结构尚不为人所知，到目前为止还很少受到关注。在本文中，使用X射线衍射，透射电子显微镜和能量色散光谱进行了一系列研究，以确定LSAT的原子结构。已发现，LSAT由两种类型的畴组成：一种具有简单的立方钙钛矿结构（无序= 0.3868 nm），另一种具有面心立方结构（无序= 0.773 nm）。高分辨率晶格图像的计算机图像模拟表明，有序结构归因于Al和Ta离子的有序性。

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来源
《Journal of Materials Research》 |2003年第7期|p.1698-1704|共7页
作者
H. Li; L. Salamanca-Riba; R. Ramesh; J.H. Scott;
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作者单位

Motorola Labs, 7700 S. River Parkway, Tempe, AZ;

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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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正文语种 eng
中图分类工程材料学;
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Ordering in (La,Sr)(Al,Ta)O_3 substrates

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