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Epitaxially grown la-modified BiFeO3 magnetoferroelectric thin films SCIE SCOPUS

Title
Epitaxially grown la-modified BiFeO3 magnetoferroelectric thin films
Authors
Lee, DKim, MGRyu, SJang, HMLee, SG
Date Issued
2005-05-30
Publisher
AMER INST PHYSICS
Abstract
Effects of the La modification on the structure and magnetoferroelectric properties of BiFeO3 (BFO)-based films were examined. On SrTiO3 (001) planes, all the BFO-based films (for x between 0 and 0.15 in Bi1-xLaxFeO3 with the film thickness of 300 nm) were grown epitaxially along [001] direction of tetragonal symmetry. However, the La modification gradually changes the film structure from a monoclinically tilted state to a nontilted tetragonal-like state. Both extended x-ray absorption fine structure and x-ray absorption near edge structure spectra revealed the presence of a strong in-plane compressive stress. Room-temperature magnetization-field curves indicated that the saturation magnetization of these BFO-based epitaxial films increased with the degree of La modification. La-modified BFO film capacitors fabricated on SrRuO3-buffered SrTiO3 (001) substrates showed fatigue-free ferroelectric switching characteristics up to 4x10(10) read/write cycles at a frequency of 1 MHz. (c) 2005 American Institute of Physics.
URI
https://oasis.postech.ac.kr/handle/2014.oak/9496
DOI
10.1063/1.1941474
ISSN
0003-6951
Article Type
Article
Citation
APPLIED PHYSICS LETTERS, vol. 86, no. 22, 2005-05-30
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장현명JANG, HYUN MYUNG
Div of Advanced Materials Science
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