Flexible Quasi-Two-Dimensional CoFe2O4 Epitaxial Thin Films for Continuous Strain Tuning of Magnetic Properties
- Xi’an Jiaotong Univ. (China)
- Xidian University, Xi’an (China)
- Xi’an Univ. of Technology (China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Shenzhen Univ. (China)
- South Univ. of Science and Technology, Shenzhen (China)
- Univ. of Warwick (United Kingdom)
- Xi’an Jiaotong Univ. (China); Ernst Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich (Germany)
Epitaxial thin films of CoFe2O4 (CFO) have successfully been transferred from a SrTiO3 substrate onto a flexible polyimide substrate. By bending the flexible polyimide, different levels of uniaxial strain are continuously introduced into the CFO epitaxial thin films. Unlike traditional epitaxial strain induced by substrates, the strain from bending will not suffer from critical thickness limitation, crystalline quality variation, and substrate clamping, and more importantly, it provides a more intrinsic and reliable way to study strain-controlled behaviors in functional oxide systems. It is found that both the saturation magnetization and coercivity of the transferred films can be changed over the bending status and show a high accord with the movement of the curvature bending radius of the polyimide substrate. Lastly, this reveals that the mechanical strain plays a critical role in tuning the magnetic properties of CFO thin films parallel and perpendicular to the film plane direction.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
- Grant/Contract Number:
- 89233218CNA000001; AC52-06NA25396
- OSTI ID:
- 1557778
- Report Number(s):
- LA-UR-18-28697
- Journal Information:
- ACS Nano, Vol. 11, Issue 8; ISSN 1936-0851
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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