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Incommensurate crystal supercell and polarization flop observed in the magnetoelectric ilmenite
Abstract
In the last few years the magnetoelectric behavior of MnTiO3 has been observed even though its been studied for many decades. We use neutron scattering on two separately grown single crystals and two powder samples to show the presence of a supercell that breaks R (3) over bar symmetry. We also present the temperature and field dependence of the dielectric constant and pyroelectric current and show evidence of nonzero off-diagonal magnetoelectric tensor elements (forbidden by R (3) over bar symmetry) followed by a polarization flop accompanying the spin flop transition at mu H-0(SF) = 6.5T. Mossbauer spectroscopy on MnTiO3 gently doped with Fe-57 was used to help shed light on the impact of the supercell on the observed behavior. Moreover, the full supercell structure could not be solved at this time due to a lack of visible reflections, the full scope of the results presented here suggest that the role of local spin-lattice coupling in the magnetoelectric properties of MnTiO3 is likely more important than previously thought.
- Authors:
-
- Unv. of Manitoba, Winnipeg (Canada); Stanford Univ., CA (United States)
- Univ. of Manitoba, Winnipeg (Canada)
- Unv. of Manitoba, Winnipeg (Canada)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Florida State Univ., Tallahassee, FL (United States)
- Unv. of Manitoba, Winnipeg (Canada); McMaster Univ., Hamilton, ON (Canada); Canadian Inst. for Advanced Research, Toronto, ON (Canada)
- Florida State Univ., Tallahassee, FL (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1261515
- Alternate Identifier(s):
- OSTI ID: 1238414
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 93; Journal Issue: 5; 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
Citation Formats
Silverstein, Harlyn J., Skoropata, Elizabeth, Sarte, Paul M., Mauws, Cole, Aczel, Adam A., Choi, Eun Sang, van Lierop, Johan, Wiebe, Christopher R., and Zhou, Haidong. Incommensurate crystal supercell and polarization flop observed in the magnetoelectric ilmenite MnTiO3. United States: N. p., 2016.
Web. doi:10.1103/PhysRevB.93.054416.
Silverstein, Harlyn J., Skoropata, Elizabeth, Sarte, Paul M., Mauws, Cole, Aczel, Adam A., Choi, Eun Sang, van Lierop, Johan, Wiebe, Christopher R., & Zhou, Haidong. Incommensurate crystal supercell and polarization flop observed in the magnetoelectric ilmenite MnTiO3. United States. https://doi.org/10.1103/PhysRevB.93.054416
Silverstein, Harlyn J., Skoropata, Elizabeth, Sarte, Paul M., Mauws, Cole, Aczel, Adam A., Choi, Eun Sang, van Lierop, Johan, Wiebe, Christopher R., and Zhou, Haidong. 2016.
"Incommensurate crystal supercell and polarization flop observed in the magnetoelectric ilmenite MnTiO3". United States. https://doi.org/10.1103/PhysRevB.93.054416. https://www.osti.gov/servlets/purl/1261515.
@article{osti_1261515,
title = {Incommensurate crystal supercell and polarization flop observed in the magnetoelectric ilmenite MnTiO3},
author = {Silverstein, Harlyn J. and Skoropata, Elizabeth and Sarte, Paul M. and Mauws, Cole and Aczel, Adam A. and Choi, Eun Sang and van Lierop, Johan and Wiebe, Christopher R. and Zhou, Haidong},
abstractNote = {In the last few years the magnetoelectric behavior of MnTiO3 has been observed even though its been studied for many decades. We use neutron scattering on two separately grown single crystals and two powder samples to show the presence of a supercell that breaks R (3) over bar symmetry. We also present the temperature and field dependence of the dielectric constant and pyroelectric current and show evidence of nonzero off-diagonal magnetoelectric tensor elements (forbidden by R (3) over bar symmetry) followed by a polarization flop accompanying the spin flop transition at mu H-0(SF) = 6.5T. Mossbauer spectroscopy on MnTiO3 gently doped with Fe-57 was used to help shed light on the impact of the supercell on the observed behavior. Moreover, the full supercell structure could not be solved at this time due to a lack of visible reflections, the full scope of the results presented here suggest that the role of local spin-lattice coupling in the magnetoelectric properties of MnTiO3 is likely more important than previously thought.},
doi = {10.1103/PhysRevB.93.054416},
url = {https://www.osti.gov/biblio/1261515},
journal = {Physical Review B},
issn = {2469-9950},
number = 5,
volume = 93,
place = {United States},
year = {Fri Feb 19 00:00:00 EST 2016},
month = {Fri Feb 19 00:00:00 EST 2016}
}
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