Influence of oxygen pressure and aging on LaAlO3 films grown by pulsed laser deposition on SrTiO3 substrates

被引：13

作者：

Park, Jihwey ^{[1
]}

Soh, Yeong-Ah ^{[1
,2
]}

Aeppli, Gabriel ^{[1
]}

David, Adrian ^{[3
]}

Lin, Weinan ^{[3
]}

Wu, Tom ^{[4
]}

机构：

[1] UCL, London Ctr Nanotechnol, London WC1H 0AH, England

[2] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2AZ, England

[3] Nanyang Technol Univ, Div Phys & Appl Phys, Singapore 637371, Singapore

[4] King Abdullah Univ Sci & Technol, Phys Sci & Engn Div, Thuwal 239556900, Saudi Arabia

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 08期

基金：

英国工程与自然科学研究理事会;

关键词：

INTERFACES; SUPERCONDUCTIVITY; COEXISTENCE; ATTENUATION; TABULATION;

D O I：

10.1063/1.4866439

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The crystal structures of LaAlO3 films grown by pulsed laser deposition on SrTiO3 substrates at oxygen pressure of 10(-3) millibars or 10(-5) millibars, where kinetics of ablated species hardly depend on oxygen background pressure, are compared. Our results show that the interface between LaAlO3 and SrTiO3 is sharper when the oxygen pressure is lower. Over time, the formation of various crystalline phases is observed while the crystalline thickness of the LaAlO3 layer remains unchanged. X-ray scattering as well as atomic force microscopy measurements indicate three-dimensional growth of such phases, which appear to be fed from an amorphous capping layer present in as-grown samples. (C) 2014 AIP Publishing LLC.

引用

页数：5

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