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Title: Flexible Quasi-Two-Dimensional CoFe2O4 Epitaxial Thin Films for Continuous Strain Tuning of Magnetic Properties

Journal Article · · ACS Nano
 [1];  [1]; ORCiD logo [1];  [2];  [2];  [1]; ORCiD logo [1];  [3]; ORCiD logo [4];  [5];  [6];  [7];  [8]
  1. Xi’an Jiaotong Univ. (China)
  2. Xidian University, Xi’an (China)
  3. Xi’an Univ. of Technology (China)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. Shenzhen Univ. (China)
  6. South Univ. of Science and Technology, Shenzhen (China)
  7. Univ. of Warwick (United Kingdom)
  8. 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
Citation Metrics:
Cited by: 101 works
Citation information provided by
Web of Science

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Metal Oxide Nanocomposites: A Perspective from Strain, Defect, and Interface journal October 2018
Enhanced bending-tuned magnetic properties in epitaxial cobalt ferrite nanopillar arrays on flexible substrates journal January 2018
Development of oxide heteroepitaxy for soft technology journal January 2018
Recent progress on the fabrication and applications of flexible ferroelectric devices journal January 2020
Hydrogenation Dynamics of Electrically Controlled Metal–Insulator Transition in Proton‐Gated Transparent and Flexible WO 3 Transistors journal June 2019
A Strategy to Modulate the Bending Coupled Microwave Magnetism in Nanoscale Epitaxial Lithium Ferrite for Flexible Spintronic Devices journal November 2018
Recent progress on flexible inorganic single-crystalline functional oxide films for advanced electronics journal January 2019
Oriented tuning the photovoltaic properties of γ -RbGeX 3 by strain-induced electron effective mass mutation journal October 2017
Heterogeneous integration of single-crystalline complex-oxide membranes journal February 2020
Design of an all-inorganic flexible Na 0.5 Bi 0.5 TiO 3 -based film capacitor with giant and stable energy storage performance journal January 2019
Flexible, Temperature‐Stable, and Fatigue‐Endurable PbZr 0.52 Ti 0.48 O 3 Ferroelectric Film for Nonvolatile Memory journal July 2019
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