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Title: Enhanced spontaneous polarization in double perovskite Bi2FeCrO6 films

Abstract

Here, we report the pulsed-laser deposition of epitaxial double-perovskite Bi2FeCrO6 (BFCO) films on the (001)-, (110), and (111)-oriented single-crystal SrTiO3 substrates. All of the BFCO films with various orientations show the $1/21/21/2$ and $3/23/23/2$ superlattice-diffraction peaks. The intensity ratios between the $1/21/21/2$-superlattice and the main 111-diffraction peak can be tailored by simply adjusting the laser repetition rate and substrate temperature, reaching up to 4.4%. However, both optical absorption spectra and magnetic measurements evidence that the strong superlattice peaks are not correlated with the B-site Fe3+/Cr3+ cation ordering. Instead, the epitaxial (111)-oriented Bi2FeCrO6 films show an enhanced remanent polarization of 92 μC/cm2 at 10 K, much larger than the predicted values by density-functional theory calculations. Positive-up-negative-down (PUND) measurements with a time interval of 10 μs further support these observations. Therefore, our experimental results reveal that the strong superlattice peaks may come from A- or B-site cation shifts along the pseudo-cubic [111] direction, which further enhance the ferroelectric polarization of the BFCO thin films.

Authors:
 [1];  [1];  [1]; ORCiD logo [1];  [1];  [2];  [3];  [3]; ORCiD logo [1]
  1. Univ. of Electronic Science and Technology of China, Chengdu (China)
  2. Chinese Academy of Sciences (CAS), Beijing (China)
  3. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF); National Key Research and Development Plan; National Science Foundation of China
OSTI Identifier:
1637297
Grant/Contract Number:  
AC02-05CH11231; DMR-1708615; 2016YFA0300801; 2017YFB0406400; 61871081
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Volume: 102; Journal Issue: 9; Journal ID: ISSN 0002-7820
Publisher:
American Ceramic Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; anomalous photovoltaic; bandgap; ferroelectric materials; magnetization; perovskite oxides

Citation Formats

Meng, Dehuan, Xiao, Yunsheng, He, Hongcai, Liao, Yulong, Zhang, Huaiwu, Zhai, Junyi, Chen, Zuhuang, Martin, Lane W., and Bai, Feiming. Enhanced spontaneous polarization in double perovskite Bi2FeCrO6 films. United States: N. p., 2019. Web. doi:10.1111/jace.16386.
Meng, Dehuan, Xiao, Yunsheng, He, Hongcai, Liao, Yulong, Zhang, Huaiwu, Zhai, Junyi, Chen, Zuhuang, Martin, Lane W., & Bai, Feiming. Enhanced spontaneous polarization in double perovskite Bi2FeCrO6 films. United States. https://doi.org/10.1111/jace.16386
Meng, Dehuan, Xiao, Yunsheng, He, Hongcai, Liao, Yulong, Zhang, Huaiwu, Zhai, Junyi, Chen, Zuhuang, Martin, Lane W., and Bai, Feiming. Mon . "Enhanced spontaneous polarization in double perovskite Bi2FeCrO6 films". United States. https://doi.org/10.1111/jace.16386. https://www.osti.gov/servlets/purl/1637297.
@article{osti_1637297,
title = {Enhanced spontaneous polarization in double perovskite Bi2FeCrO6 films},
author = {Meng, Dehuan and Xiao, Yunsheng and He, Hongcai and Liao, Yulong and Zhang, Huaiwu and Zhai, Junyi and Chen, Zuhuang and Martin, Lane W. and Bai, Feiming},
abstractNote = {Here, we report the pulsed-laser deposition of epitaxial double-perovskite Bi2FeCrO6 (BFCO) films on the (001)-, (110), and (111)-oriented single-crystal SrTiO3 substrates. All of the BFCO films with various orientations show the $1/21/21/2$ and $3/23/23/2$ superlattice-diffraction peaks. The intensity ratios between the $1/21/21/2$-superlattice and the main 111-diffraction peak can be tailored by simply adjusting the laser repetition rate and substrate temperature, reaching up to 4.4%. However, both optical absorption spectra and magnetic measurements evidence that the strong superlattice peaks are not correlated with the B-site Fe3+/Cr3+ cation ordering. Instead, the epitaxial (111)-oriented Bi2FeCrO6 films show an enhanced remanent polarization of 92 μC/cm2 at 10 K, much larger than the predicted values by density-functional theory calculations. Positive-up-negative-down (PUND) measurements with a time interval of 10 μs further support these observations. Therefore, our experimental results reveal that the strong superlattice peaks may come from A- or B-site cation shifts along the pseudo-cubic [111] direction, which further enhance the ferroelectric polarization of the BFCO thin films.},
doi = {10.1111/jace.16386},
journal = {Journal of the American Ceramic Society},
number = 9,
volume = 102,
place = {United States},
year = {Mon Mar 04 00:00:00 EST 2019},
month = {Mon Mar 04 00:00:00 EST 2019}
}

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Figures / Tables:

FIGURE 1 FIGURE 1: XRD θ‐2θ scans of BFCO films deposited on (A) the (001)‐, (b) (110)‐ and (c) (111)‐oriented STO substrates. The inserts of Figure 1A,B show the measured hhh‐diffractions peaks of the BFCO films deposited on the (001)‐ and (110)‐oriented STO substrates. D, The rocking curve of (002) peak correspondingmore » to the (001)‐oriented film. E, Phi‐scans about the 202‐diffraction peaks of the (001)‐oriented BFCO films. F, Reciprocal space mapping about 103‐diffraction peak of the (001)‐oriented BFCO film« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.