Coherent piezoelectric strain transfer to thick epitaxial ferromagnetic films with large lattice mismatch
Loading...
Access rights
© 2013 IOP Publishing. This is the accepted version of the following article: Kim, Jang-Yong & Yao, Lide & van Dijken, Sebastiaan. 2013. Coherent piezoelectric strain transfer to thick epitaxial ferromagnetic films with large lattice mismatch. Journal of Physics: Condensed Matter. Volume 25, Issue 8. 082205/1-7. ISSN 0953-8984 (printed). DOI: 10.1088/0953-8984/25/8/082205, which has been published in final form at http://iopscience.iop.org/0953-8984/25/8/082205/.
This work is distributed under the Creative Commons Attribution 3.0 License (https://creativecommons.org/licenses/by/3.0/).
URL
Journal Title
Journal ISSN
Volume Title
School of Science |
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Unless otherwise stated, all rights belong to the author. You may download, display and print this publication for Your own personal use. Commercial use is prohibited.
Date
2013
Major/Subject
Mcode
Degree programme
Language
en
Pages
082205/1-7
Series
Journal of Physics: Condensed Matter, Volume 25, Issue 8
Abstract
Strain control of epitaxial films using piezoelectric substrates has recently attracted significant scientific interest. Despite its potential as a powerful test bed for strain-related physical phenomena and strain-driven electronic, magnetic, and optical technologies, detailed studies on the efficiency and uniformity of piezoelectric strain transfer are scarce. Here, we demonstrate that full and uniform piezoelectric strain transfer to epitaxial films is not limited to systems with small lattice mismatch or limited film thickness. Detailed transmission electron microscopy (TEM) and x-ray diffraction (XRD) measurements of 100 nm thick CoFe2O4 and La2/3Sr1/3MnO3 epitaxial films on piezoelectric 0.72Pb(Mg1/3Nb2/3)O3–0.28PbTiO3 substrates (+4.3% and -3.8% lattice mismatch) indicate that misfit dislocations near the interface do not hamper the transfer of piezoelectric strain. Instead, the epitaxial magnetic oxide films and PMN-PT substrates are strained coherently and their lattice parameters change linearly as a function of applied electric field when their remnant growth-induced strain state is negligible. As a result, ferromagnetic properties such as the coercive field, saturation magnetization, and Curie temperature can be reversibly tuned by electrical means. The observation of efficient piezoelectric strain transfer in large-mismatch heteroepitaxial structures opens up new possibilities for the engineering of strain-controlled physical properties in a broad class of hybrid material systems.Description
Keywords
magnetic films, piezoelectric strain, epitaxy
Other note
Citation
Kim, Jang-Yong & Yao, Lide & van Dijken, Sebastiaan. 2013. Coherent piezoelectric strain transfer to thick epitaxial ferromagnetic films with large lattice mismatch. Journal of Physics: Condensed Matter. Volume 25, Issue 8. 082205/1-7. ISSN 0953-8984 (printed). DOI: 10.1088/0953-8984/25/8/082205