Microstructure and Properties of La0.7 Sr0.3 MnO3 Films Deposited on LaAlO3 (100), (110), and ( 111 ) Substrates
来源期刊：JOURNAL OF RARE EARTHS2006年第5期
论文作者：Yan Hui Yu Dunbo Zhang Xuefeng Du Yongsheng
Key words：La0.7Sr0.3MnO3 film; strain; crystallographic; elastic modulus; rare earths;
Abstract: A comparative study of the crystalline structure, magnetic properties, and transport properties of LSMO films grown on ( 100)-, ( 110)-, and (111 ) LaAlO3(LAO) substrates was carried out. Using atomic force microscopy, round,rectangle, and dot surface morphologies were observed in (100)-, (110)-, and (111 )-oriented LSMO films, respectively.Electrical and magnetic characterizations were performed on LSMO films of different orientation to provide evidence for the effect of strain on the magnetotransport properties. The ( 111)-oriented LSMO film has higher saturation magnetization and lower resistance compared with the (100)- and (110)-oriented LSMO films, which results from the smaller elastic deformation due to the larger elastic modulus along the 〈 111 〉 crystallographic direction.
Yan Hui1，Yu Dunbo2，Zhang Xuefeng3，Du Yongsheng3
(1.Laboratory of Thin Film Materials, Beijing University of Technology, Beijing 100022, China;
2.Grirem Advanced Materials Co. , Ltd. , Beijing 100088, China;
3.College of Science, Inner Mongolia University of Science & Technology, Baotou 014010, China)
Abstract:A comparative study of the crystalline structure, magnetic properties, and transport properties of LSMO films grown on ( 100)-, ( 110)-, and (111 ) LaAlO3(LAO) substrates was carried out. Using atomic force microscopy, round,rectangle, and dot surface morphologies were observed in (100)-, (110)-, and (111 )-oriented LSMO films, respectively.Electrical and magnetic characterizations were performed on LSMO films of different orientation to provide evidence for the effect of strain on the magnetotransport properties. The ( 111)-oriented LSMO film has higher saturation magnetization and lower resistance compared with the (100)- and (110)-oriented LSMO films, which results from the smaller elastic deformation due to the larger elastic modulus along the 〈 111 〉 crystallographic direction.
Key words:La0.7Sr0.3MnO3 film; strain; crystallographic; elastic modulus; rare earths;
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