Integration of sputter-deposited multiferroic CoFe2O4?BiFeO3 nanocomposites on conductive La0.7Sr0.3MnO3 electrodes

Title
Integration of sputter-deposited multiferroic CoFe2O4?BiFeO3 nanocomposites on conductive La0.7Sr0.3MnO3 electrodes
Authors
최준우Seung Han LeeGuo TianTae Cheol KimHyun Kyu JungFrederick J WalkerCharles H AhnCaroline A RossDong Hun Kim
Keywords
multiferroic; nanocomposites
Issue Date
2019-01
Publisher
Nanotechnology
Citation
VOL 30-105561-13
Abstract
The structure, magnetic and ferroelectric properties of sputtered epitaxial CoFe2O4-BiFeO3 (CFO-BFO) nanocomposite thin films grown on La0.7Sr0.3MnO3 (LSMO) layers on (001) oriented SrTiO3 (STO) substrates and on STO-buffered Si are described. The as-grown LSMO thin films were smooth and poorly conductive but the resistivity was reduced and the surfaces roughened after annealing. Cosputtered CFO and BFO on STO formed vertically aligned nanostructures consisting of epitaxial spinel CFO pillars within a perovskite BFO matrix, but the rough surface of the annealed LSMO film promoted additional CFO pillar orientations. A reorientation of the CFO magnetic easy axis to an in-plane direction occurred as the LSMO became thicker due to changes in the strain state of the CFO pillars. The LSMO underlayer enabled the ferroelectric response of the BFO to be measured. Nanocomposites were grown onto LSMO/SrTiO3/Si which provides a path towards large scale integration of electrically contacted nanocomposites on Si.
URI
http://pubs.kist.re.kr/handle/201004/69389
ISSN
0957-4484
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KIST Publication > Article
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