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Title: Magnetic anisotropy in single-crystal high-entropy perovskite oxide La ( C r 0.2 M n 0.2 F e 0.2 C o 0.2 N i 0.2 ) O 3 films

Abstract

Configurational disorder can have a dominating role in the formation of macroscopic functional responses in strongly correlated materials. In this work, we use entropy-stabilization synthesis to create single-crystal epitaxial ABO3 perovskite thin films with equal atomic concentration of $3d$ transition-metal cations on the B-site sublattice. X-ray diffraction, atomic force microscopy, and scanning transmission electron microscopy of La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 (L5BO) films demonstrate excellent crystallinity, smooth film surfaces, and uniform mixing of the $3d$ transition-metal cations throughout the B-site sublattice. The magnetic properties are strongly dependent on substrate-induced lattice anisotropy and suggest the presence of long-range magnetic order in these exceptionally disordered materials. The ability to populate multiple elements onto a single sublattice in complex crystal structures opens new possibilities to design functionality in correlated systems and enable novel fundamental studies seeking to understand how diverse local bonding environments can work to generate macroscopic responses, such as those driven by electron-phonon channels and complex exchange interaction pathways.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [3]; ORCiD logo [4];  [5];  [3]; ORCiD logo [1];  [5]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Univ. of Missouri, Columbia, MO (United States)
  3. Univ. of Missouri, Columbia, MO (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
  5. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS) and Spallation Neutron Source (SNS); Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF)
OSTI Identifier:
1606929
Grant/Contract Number:  
AC05-00OR22725; DGE-1069091; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Synthesis; high entropy oxides; disorder; perovskites; strongly correlated electrons; magnetism

Citation Formats

Sharma, Yogesh, Zheng, Qiang, Mazza, Alessandro, Skoropata, Elizabeth, Heitmann, Thomas, Gai, Zheng, Musico, Brianna L., Miceli, Paul, Sales, Brian C., Keppens, Veerle, Brahlek, Matthew, and Ward, Thomas Zac. Magnetic anisotropy in single-crystal high-entropy perovskite oxide La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 films. United States: N. p., 2020. Web. https://doi.org/10.1103/PhysRevMaterials.4.014404.
Sharma, Yogesh, Zheng, Qiang, Mazza, Alessandro, Skoropata, Elizabeth, Heitmann, Thomas, Gai, Zheng, Musico, Brianna L., Miceli, Paul, Sales, Brian C., Keppens, Veerle, Brahlek, Matthew, & Ward, Thomas Zac. Magnetic anisotropy in single-crystal high-entropy perovskite oxide La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 films. United States. https://doi.org/10.1103/PhysRevMaterials.4.014404
Sharma, Yogesh, Zheng, Qiang, Mazza, Alessandro, Skoropata, Elizabeth, Heitmann, Thomas, Gai, Zheng, Musico, Brianna L., Miceli, Paul, Sales, Brian C., Keppens, Veerle, Brahlek, Matthew, and Ward, Thomas Zac. Mon . "Magnetic anisotropy in single-crystal high-entropy perovskite oxide La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 films". United States. https://doi.org/10.1103/PhysRevMaterials.4.014404. https://www.osti.gov/servlets/purl/1606929.
@article{osti_1606929,
title = {Magnetic anisotropy in single-crystal high-entropy perovskite oxide La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 films},
author = {Sharma, Yogesh and Zheng, Qiang and Mazza, Alessandro and Skoropata, Elizabeth and Heitmann, Thomas and Gai, Zheng and Musico, Brianna L. and Miceli, Paul and Sales, Brian C. and Keppens, Veerle and Brahlek, Matthew and Ward, Thomas Zac},
abstractNote = {Configurational disorder can have a dominating role in the formation of macroscopic functional responses in strongly correlated materials. In this work, we use entropy-stabilization synthesis to create single-crystal epitaxial ABO3 perovskite thin films with equal atomic concentration of $3d$ transition-metal cations on the B-site sublattice. X-ray diffraction, atomic force microscopy, and scanning transmission electron microscopy of La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 (L5BO) films demonstrate excellent crystallinity, smooth film surfaces, and uniform mixing of the $3d$ transition-metal cations throughout the B-site sublattice. The magnetic properties are strongly dependent on substrate-induced lattice anisotropy and suggest the presence of long-range magnetic order in these exceptionally disordered materials. The ability to populate multiple elements onto a single sublattice in complex crystal structures opens new possibilities to design functionality in correlated systems and enable novel fundamental studies seeking to understand how diverse local bonding environments can work to generate macroscopic responses, such as those driven by electron-phonon channels and complex exchange interaction pathways.},
doi = {10.1103/PhysRevMaterials.4.014404},
journal = {Physical Review Materials},
number = 1,
volume = 4,
place = {United States},
year = {2020},
month = {1}
}

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