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Title: Self-Assembled Room Temperature Multiferroic BiFeO3-LiFe5O8 Nanocomposites

Abstract

Multiferroic materials have driven significant research interest due to their promising technological potential. Developing new room-temperature multiferroics and understanding their fundamental properties are important to reveal unanticipated physical phenomena and potential applications. Here, a new room temperature multiferroic nanocomposite comprised of an ordered ferrimagnetic spinel α-LiFe5O8 (LFO) and a ferroelectric perovskite BiFeO3 (BFO) is presented. It is observed that lithium (Li)-doping in BFO favors the formation of LFO spinel as a secondary phase during the synthesis of LixBi1-xFeO3 ceramics. Multimodal functional and chemical imaging methods are used to map the relationship between doping-induced phase separation and local ferroic properties in both the BFO-LFO composite ceramics and self-assembled nanocomposite thin films. The energetics of phase separation in Li doped BFO and the formation of BFO-LFO composites are supported by first principles calculations. These findings shed light on Li's role in the formation of a functionally important room temperature multiferroic and open a new approach in the synthesis of light element doped nanocomposites for future energy, sensing, and memory applications.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [3];  [1];  [1];  [1];  [3];  [2];  [3];  [1];  [5]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  2. Univ. of Puerto Rico, San Juan, PR (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Univ. of Tennessee, Knoxville, TN (United States)
  5. Korea Advanced Inst. Science and Technology (KAIST), Daejeon (Korea, Republic of)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1606993
Alternate Identifier(s):
OSTI ID: 1571694
Grant/Contract Number:  
AC05-00OR22725; AC02‐05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Functional Materials
Additional Journal Information:
Journal Volume: 30; Journal Issue: 3; Journal ID: ISSN 1616-301X
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; light element doping; multiferroics; nanoferroic properties; scanning probe microscopy; self‐assembled nanocomposites; thin film nanostructures

Citation Formats

Sharma, Yogesh, Agarwal, Radhe, Collins, Liam, Zheng, Qiang, Ievlev, Anton V., Hermann, Raphael P., Cooper, Valentino R., KC, Santosh, Ivanov, Ilia N., Katiyar, Ram S., Kalinin, Sergei V., Lee, Ho Nyung, Hong, Seungbum, and Ward, Thomas Z. Self-Assembled Room Temperature Multiferroic BiFeO3-LiFe5O8 Nanocomposites. United States: N. p., 2019. Web. doi:10.1002/adfm.201906849.
Sharma, Yogesh, Agarwal, Radhe, Collins, Liam, Zheng, Qiang, Ievlev, Anton V., Hermann, Raphael P., Cooper, Valentino R., KC, Santosh, Ivanov, Ilia N., Katiyar, Ram S., Kalinin, Sergei V., Lee, Ho Nyung, Hong, Seungbum, & Ward, Thomas Z. Self-Assembled Room Temperature Multiferroic BiFeO3-LiFe5O8 Nanocomposites. United States. https://doi.org/10.1002/adfm.201906849
Sharma, Yogesh, Agarwal, Radhe, Collins, Liam, Zheng, Qiang, Ievlev, Anton V., Hermann, Raphael P., Cooper, Valentino R., KC, Santosh, Ivanov, Ilia N., Katiyar, Ram S., Kalinin, Sergei V., Lee, Ho Nyung, Hong, Seungbum, and Ward, Thomas Z. Thu . "Self-Assembled Room Temperature Multiferroic BiFeO3-LiFe5O8 Nanocomposites". United States. https://doi.org/10.1002/adfm.201906849. https://www.osti.gov/servlets/purl/1606993.
@article{osti_1606993,
title = {Self-Assembled Room Temperature Multiferroic BiFeO3-LiFe5O8 Nanocomposites},
author = {Sharma, Yogesh and Agarwal, Radhe and Collins, Liam and Zheng, Qiang and Ievlev, Anton V. and Hermann, Raphael P. and Cooper, Valentino R. and KC, Santosh and Ivanov, Ilia N. and Katiyar, Ram S. and Kalinin, Sergei V. and Lee, Ho Nyung and Hong, Seungbum and Ward, Thomas Z.},
abstractNote = {Multiferroic materials have driven significant research interest due to their promising technological potential. Developing new room-temperature multiferroics and understanding their fundamental properties are important to reveal unanticipated physical phenomena and potential applications. Here, a new room temperature multiferroic nanocomposite comprised of an ordered ferrimagnetic spinel α-LiFe5O8 (LFO) and a ferroelectric perovskite BiFeO3 (BFO) is presented. It is observed that lithium (Li)-doping in BFO favors the formation of LFO spinel as a secondary phase during the synthesis of LixBi1-xFeO3 ceramics. Multimodal functional and chemical imaging methods are used to map the relationship between doping-induced phase separation and local ferroic properties in both the BFO-LFO composite ceramics and self-assembled nanocomposite thin films. The energetics of phase separation in Li doped BFO and the formation of BFO-LFO composites are supported by first principles calculations. These findings shed light on Li's role in the formation of a functionally important room temperature multiferroic and open a new approach in the synthesis of light element doped nanocomposites for future energy, sensing, and memory applications.},
doi = {10.1002/adfm.201906849},
journal = {Advanced Functional Materials},
number = 3,
volume = 30,
place = {United States},
year = {Thu Oct 24 00:00:00 EDT 2019},
month = {Thu Oct 24 00:00:00 EDT 2019}
}

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Cited by: 11 works
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Figures / Tables:

Figure 1 Figure 1: Room temperature X-ray powder diffraction and microscopic Raman mapping. (a) Rietveld refinement of powder X-ray diffraction (XRD) data collected from Li0.09Bi0.91FeO3 (9Li- BFO) sample. The XRD pattern can be fitted by the three different phases; rhombohedral BiFeO3 (BFO, black), sillenite Bi12.5Fe0.5O20 (green) and ordered spinel $α$-LiFe5O8 (LFO, pink).more » (b) Micro-Raman mapping on 9Li-BFO shows the different phase-domains. (c) The Raman mapped area is comprised of three types of spectra from BFO, Bi-excess BFO, and LFO phases. The observation of additional modes at 358, 490, and 530 cm-1 of broader linewidth in Raman spectrum of the Bi-excess BFO suggests the presence of the Bi12.5Fe0.5O20 phase. The observed phonon modes of LFO phase are consistent with the Raman spectrum of bulk single crystal of ordered LFO (ref. 40). (d) The crystal structure of ordered spinel LFO (denoted as Fe[Li1+0.5 Fe3+1.5]O4) shows a specific 1:3 ordering of Li1+ and Fe3+ at the octahedral $B$ sites.« less

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