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Title: Flexible Quasi-Two-Dimensional CoFe 2O 4 Epitaxial Thin Films for Continuous Strain Tuning of Magnetic Properties

Abstract

Epitaxial thin films of CoFe 2O 4 (CFO) have successfully been transferred from a SrTiO 3 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.

Authors:
 [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)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
OSTI Identifier:
1557778
Report Number(s):
LA-UR-18-28697
Journal ID: ISSN 1936-0851
Grant/Contract Number:  
89233218CNA000001; AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 11; Journal Issue: 8; Journal ID: ISSN 1936-0851
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; free-standing thin films; strain tuning; CoFe2O4; magnetic properties; flexible electronics

Citation Formats

Zhang, Yong, Shen, Lvkang, Liu, Ming, Li, Xin, Lu, Xiaoli, Lu, Lu, Ma, Chunrui, You, Caiyin, Chen, Aiping, Huang, Chuanwei, Chen, Lang, Alexe, Marin, and Jia, Chun-Lin. Flexible Quasi-Two-Dimensional CoFe2O4 Epitaxial Thin Films for Continuous Strain Tuning of Magnetic Properties. United States: N. p., 2017. Web. doi:10.1021/acsnano.7b02637.
Zhang, Yong, Shen, Lvkang, Liu, Ming, Li, Xin, Lu, Xiaoli, Lu, Lu, Ma, Chunrui, You, Caiyin, Chen, Aiping, Huang, Chuanwei, Chen, Lang, Alexe, Marin, & Jia, Chun-Lin. Flexible Quasi-Two-Dimensional CoFe2O4 Epitaxial Thin Films for Continuous Strain Tuning of Magnetic Properties. United States. doi:10.1021/acsnano.7b02637.
Zhang, Yong, Shen, Lvkang, Liu, Ming, Li, Xin, Lu, Xiaoli, Lu, Lu, Ma, Chunrui, You, Caiyin, Chen, Aiping, Huang, Chuanwei, Chen, Lang, Alexe, Marin, and Jia, Chun-Lin. Wed . "Flexible Quasi-Two-Dimensional CoFe2O4 Epitaxial Thin Films for Continuous Strain Tuning of Magnetic Properties". United States. doi:10.1021/acsnano.7b02637. https://www.osti.gov/servlets/purl/1557778.
@article{osti_1557778,
title = {Flexible Quasi-Two-Dimensional CoFe2O4 Epitaxial Thin Films for Continuous Strain Tuning of Magnetic Properties},
author = {Zhang, Yong and Shen, Lvkang and Liu, Ming and Li, Xin and Lu, Xiaoli and Lu, Lu and Ma, Chunrui and You, Caiyin and Chen, Aiping and Huang, Chuanwei and Chen, Lang and Alexe, Marin and Jia, Chun-Lin},
abstractNote = {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.},
doi = {10.1021/acsnano.7b02637},
journal = {ACS Nano},
number = 8,
volume = 11,
place = {United States},
year = {2017},
month = {6}
}

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