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Title: Ferromagnetism and Nonmetallic Transport of Thin-Film α - FeSi 2 : A Stabilized Metastable Material

Abstract

The epitaxially stabilized metallic α - FeSi 2 thin films on Si(001) were grown using pulsed laser deposition. While the bulk material of α - FeSi 2 is a high temperature metastable phase and nonmagnetic, the thin film is stabilized at room temperature and shows unusual electronic transport and magnetic properties due to strain modification. The transport renders two different conducting states with a strong crossover at 50 K accompanied by an onset of ferromagnetism as well as a substantial magnetocaloric effect and magnetoresistance. These experimental results are discussed in terms of the unusual electronic structure of α - FeSi 2 obtained within density functional calculations and Boltzmann transport calculations with and without strain. Our findings provide an example of a tailored material with interesting physics properties for practical applications.

Authors:
 [1];  [2];  [1];  [2];  [1];  [2];  [3];  [4];  [2];  [5];  [2];  [5];  [2];  [2];  [1];  [1];  [2];  [6];  [2];  [1]
+ Show Author Affiliations
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  3. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
  4. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  5. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
  6. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1185540
Alternate Identifier(s):
OSTI ID: 1179359
Grant/Contract Number:  
AC05-00OR22725; SC0002136
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 114; Journal Issue: 14; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Cao, Guixin, Singh, D. J., Zhang, X. -G., Samolyuk, German, Qiao, Liang, Parish, Chad, Jin, Ke, Zhang, Yanwen, Guo, Hangwen, Tang, Siwei, Wang, Wenbin, Yi, Jieyu, Cantoni, Claudia, Siemons, Wolter, Payzant, E. Andrew, Biegalski, Michael, Ward, T. Z., Mandrus, David, Stocks, G. M., and Gai, Zheng. Ferromagnetism and Nonmetallic Transport of Thin-Film α-FeSi2 : A Stabilized Metastable Material. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.114.147202.
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Cao, Guixin, Singh, D. J., Zhang, X. -G., Samolyuk, German, Qiao, Liang, Parish, Chad, Jin, Ke, Zhang, Yanwen, Guo, Hangwen, Tang, Siwei, Wang, Wenbin, Yi, Jieyu, Cantoni, Claudia, Siemons, Wolter, Payzant, E. Andrew, Biegalski, Michael, Ward, T. Z., Mandrus, David, Stocks, G. M., & Gai, Zheng. Ferromagnetism and Nonmetallic Transport of Thin-Film α-FeSi2 : A Stabilized Metastable Material. United States. https://doi.org/10.1103/PhysRevLett.114.147202
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Cao, Guixin, Singh, D. J., Zhang, X. -G., Samolyuk, German, Qiao, Liang, Parish, Chad, Jin, Ke, Zhang, Yanwen, Guo, Hangwen, Tang, Siwei, Wang, Wenbin, Yi, Jieyu, Cantoni, Claudia, Siemons, Wolter, Payzant, E. Andrew, Biegalski, Michael, Ward, T. Z., Mandrus, David, Stocks, G. M., and Gai, Zheng. Tue . "Ferromagnetism and Nonmetallic Transport of Thin-Film α-FeSi2 : A Stabilized Metastable Material". United States. https://doi.org/10.1103/PhysRevLett.114.147202. https://www.osti.gov/servlets/purl/1185540.
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@article{osti_1185540,
title = {Ferromagnetism and Nonmetallic Transport of Thin-Film α-FeSi2 : A Stabilized Metastable Material},
author = {Cao, Guixin and Singh, D. J. and Zhang, X. -G. and Samolyuk, German and Qiao, Liang and Parish, Chad and Jin, Ke and Zhang, Yanwen and Guo, Hangwen and Tang, Siwei and Wang, Wenbin and Yi, Jieyu and Cantoni, Claudia and Siemons, Wolter and Payzant, E. Andrew and Biegalski, Michael and Ward, T. Z. and Mandrus, David and Stocks, G. M. and Gai, Zheng},
abstractNote = {The epitaxially stabilized metallic α-FeSi2 thin films on Si(001) were grown using pulsed laser deposition. While the bulk material of α-FeSi2 is a high temperature metastable phase and nonmagnetic, the thin film is stabilized at room temperature and shows unusual electronic transport and magnetic properties due to strain modification. The transport renders two different conducting states with a strong crossover at 50 K accompanied by an onset of ferromagnetism as well as a substantial magnetocaloric effect and magnetoresistance. These experimental results are discussed in terms of the unusual electronic structure of α-FeSi2 obtained within density functional calculations and Boltzmann transport calculations with and without strain. Our findings provide an example of a tailored material with interesting physics properties for practical applications.},
doi = {10.1103/PhysRevLett.114.147202},
journal = {Physical Review Letters},
number = 14,
volume = 114,
place = {United States},
year = {Tue Apr 07 00:00:00 EDT 2015},
month = {Tue Apr 07 00:00:00 EDT 2015}
}
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https://doi.org/10.1103/PhysRevLett.114.147202
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    Works referencing / citing this record:

    Inducing magnetism in non-magnetic α-FeSi 2 by distortions and/or intercalations
    journal, January 2019

    • Zhandun, Vyacheslav; Zamkova, Natalia; Korzhavyi, Pavel
    • Physical Chemistry Chemical Physics, Vol. 21, Issue 25
    • DOI: 10.1039/c9cp02361e

    Mechanical alloying of Si and Fe: Quantum-mechanical calculations applied to Mössbauer and X-ray diffraction studies
    journal, September 2019

    • Dobysheva, L. V.
    • Journal of Applied Physics, Vol. 126, Issue 9
    • DOI: 10.1063/1.5095566

    Effect of electron correlations on the Fe 3 Si and α − FeSi 2 band structure and optical properties
    journal, November 2015

    Self-consistent mapping: Effect of local environment on formation of magnetic moment in α − FeSi 2
    journal, February 2017

    Effect of Epitaxial Alignment on Electron Transport from Quasi-Two-Dimensional Iron Silicide α-FeSi2 Nanocrystals Into p-Si(001)
    journal, April 2018

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