Contradictory nature of Co doping in ferroelectric
Abstract
The growth of Co-substituted BaTiO3 (BTO) films on Ge(001) substrates by molecular beam epitaxy is demonstrated in this paper. Energy-dispersive x-ray spectroscopy and transmission electron microscopy images confirm the uniform Co distribution. However, no evidence of magnetic ordering is observed in samples grown for Co concentrations between 2% and 40%. Piezoresponse force microscopy measurements show that a 5% Co-substituted BTO sample exhibits ferroelectric behavior. First-principles calculations indicate that while Co atoms couple ferromagnetically in the absence of oxygen vacancies, the occurrence of oxygen vacancies leads to locally antiferromagnetically coupled complexes with relatively strong spin coupling. Finally, the presence of a significant amount of oxygen vacancies is suggested by x-ray photoelectron spectroscopy measurements.
- Authors:
-
- Univ. of Texas, Austin, TX (United States). Dept. of Physics
- Soochow Univ., Suzhou (China). Dept. of Physics. Jiangsu Key Lab. of Thin Films
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences
- Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program/Mechanical Engineering
- Arizona State Univ., Tempe, AZ (United States). Dept. of Physics
- IBM Almaden Research Center, San Jose, CA (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Texas, Austin, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); US Air Force Office of Scientific Research (AFOSR); National Natural Science Foundation of China (NSFC)
- Contributing Org.:
- IBM Almaden Research Center, San Jose, CA (United States); Soochow Univ., Suzhou (China); Arizona State Univ., Tempe, AZ (United States)
- OSTI Identifier:
- 1343533
- Alternate Identifier(s):
- OSTI ID: 1331837
- Grant/Contract Number:
- AC05-00OR22725; FA9550-12-10494; 11104194
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 20; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ferroelectrics; piezoresponse force microscopy; DFT
Citation Formats
Ponath, Patrick, O’Hara, Andrew, Cao, Hai-Xia, Posadas, Agham B., Vasudevan, Rama, Okatan, M. Baris, Jesse, S., Berg, Morgann, Li, Zongyao, Zhang, Desai, Kellock, Andrew J., de Lozanne, Alex, Zhou, Jianshi, Kalinin, Sergei, Smith, David J., and Demkov, Alexander A. Contradictory nature of Co doping in ferroelectric BaTiO3. United States: N. p., 2016.
Web. doi:10.1103/PhysRevB.94.205121.
Ponath, Patrick, O’Hara, Andrew, Cao, Hai-Xia, Posadas, Agham B., Vasudevan, Rama, Okatan, M. Baris, Jesse, S., Berg, Morgann, Li, Zongyao, Zhang, Desai, Kellock, Andrew J., de Lozanne, Alex, Zhou, Jianshi, Kalinin, Sergei, Smith, David J., & Demkov, Alexander A. Contradictory nature of Co doping in ferroelectric BaTiO3. United States. https://doi.org/10.1103/PhysRevB.94.205121
Ponath, Patrick, O’Hara, Andrew, Cao, Hai-Xia, Posadas, Agham B., Vasudevan, Rama, Okatan, M. Baris, Jesse, S., Berg, Morgann, Li, Zongyao, Zhang, Desai, Kellock, Andrew J., de Lozanne, Alex, Zhou, Jianshi, Kalinin, Sergei, Smith, David J., and Demkov, Alexander A. Fri .
"Contradictory nature of Co doping in ferroelectric BaTiO3". United States. https://doi.org/10.1103/PhysRevB.94.205121. https://www.osti.gov/servlets/purl/1343533.
@article{osti_1343533,
title = {Contradictory nature of Co doping in ferroelectric BaTiO3},
author = {Ponath, Patrick and O’Hara, Andrew and Cao, Hai-Xia and Posadas, Agham B. and Vasudevan, Rama and Okatan, M. Baris and Jesse, S. and Berg, Morgann and Li, Zongyao and Zhang, Desai and Kellock, Andrew J. and de Lozanne, Alex and Zhou, Jianshi and Kalinin, Sergei and Smith, David J. and Demkov, Alexander A.},
abstractNote = {The growth of Co-substituted BaTiO3 (BTO) films on Ge(001) substrates by molecular beam epitaxy is demonstrated in this paper. Energy-dispersive x-ray spectroscopy and transmission electron microscopy images confirm the uniform Co distribution. However, no evidence of magnetic ordering is observed in samples grown for Co concentrations between 2% and 40%. Piezoresponse force microscopy measurements show that a 5% Co-substituted BTO sample exhibits ferroelectric behavior. First-principles calculations indicate that while Co atoms couple ferromagnetically in the absence of oxygen vacancies, the occurrence of oxygen vacancies leads to locally antiferromagnetically coupled complexes with relatively strong spin coupling. Finally, the presence of a significant amount of oxygen vacancies is suggested by x-ray photoelectron spectroscopy measurements.},
doi = {10.1103/PhysRevB.94.205121},
journal = {Physical Review B},
number = 20,
volume = 94,
place = {United States},
year = {Fri Nov 11 00:00:00 EST 2016},
month = {Fri Nov 11 00:00:00 EST 2016}
}
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Works referencing / citing this record:
Piezoelectric modulation of nonlinear optical response in BaTiO 3 thin film
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