水热外延法在 SrTiO3(001)衬底上生长 EuTiO3 薄膜及性能研究。

Hydrothermal epitaxy and resultant properties of EuTiO3 films on SrTiO3(001) substrate.

机构信息

Key Lab for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China.

Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology and School of Physics Science and Engineering, Tongji University, Shanghai 200092, China.

出版信息

Nanoscale Res Lett. 2014 May 29;9(1):266. doi: 10.1186/1556-276X-9-266. eCollection 2014.

DOI:10.1186/1556-276X-9-266

PMID:24948889

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4048538/

Abstract

UNLABELLED

We report a novel epitaxial growth of EuTiO3 films on SrTiO3(001) substrate by hydrothermal method. The morphological, structural, chemical, and magnetic properties of these epitaxial EuTiO3 films were examined by scanning electron microscopy, transmission electron microscopy, high-resolution X-ray diffractometry, X-ray photoelectron spectroscopy, and superconducting quantum interference device magnetometry, respectively. As-grown EuTiO3 films with a perovskite structure were found to show an out-of-plane lattice shrinkage and room-temperature ferromagnetism, possibly resulting from an existence of Eu(3+). Postannealing at 1,000°C could reduce the amount of Eu(3+), relax the out-of-plane lattice shrinkage, and impact the magnetic properties of the films.

PACS

81.10.Aj; 81.15.-z; 61.05.-a.

摘要

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我们通过水热法报告了在 SrTiO3(001) 衬底上 EuTiO3 薄膜的新型外延生长。通过扫描电子显微镜、透射电子显微镜、高分辨率 X 射线衍射仪、X 射线光电子能谱和超导量子干涉仪磁强计分别研究了这些外延 EuTiO3 薄膜的形貌、结构、化学和磁性。发现具有钙钛矿结构的生长 EuTiO3 薄膜表现出面外晶格收缩和室温铁磁性，这可能是由于 Eu(3+)的存在。在 1000°C 下退火可以减少 Eu(3+)的含量，弛豫面外晶格收缩，并影响薄膜的磁性。