Effect of negative chemical pressure on the prototypical itinerant magnet MnSi
Abstract
The evolution of the magnetic and charge transport properties of the itinerant magnetic metal MnSi with the substitution of Al and Ga on the Si site is investigated. We observe an increase in unit cell volume indicating that both Al and Ga substitutions create negative chemical pressure. There are substantial increases in the Curie temperature and the ordered moment demonstrating that the substitutions give the magnetism a stronger itinerant character. The substitutions also increase the range of temperature and field where the skyrmion phase is stable due to a change in the character of the magnetism. In contrast to the behavior of pure MnSi and expectations for the intrinsic anomalous Hall effect, we find a significant temperature dependence to the magnitude and sign of anomalous Hall conductivity constant in Al or Ga substituted samples. This temperature dependence likely reflects changes in the spin-orbit coupling strength with temperature, which may have significant consequences on the helical and skyrmion states. Finally, we observe a continuous evolution of magnetic and charge transport properties through positive to negative pressure.
- Authors:
-
- Louisiana State Univ., Baton Rouge, LA (United States)
- Publication Date:
- Research Org.:
- Louisiana State Univ., Baton Rouge, LA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1535822
- Alternate Identifier(s):
- OSTI ID: 1338635
- Grant/Contract Number:
- SC0012432
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 95; Journal Issue: 2; 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; materials science; physics; magnetism; magnetization measurements
Citation Formats
Dhital, C., Khan, M. A., Saghayezhian, M., Phelan, W. A., Young, D. P., Jin, R. Y., and DiTusa, J. F. Effect of negative chemical pressure on the prototypical itinerant magnet MnSi. United States: N. p., 2017.
Web. doi:10.1103/physrevb.95.024407.
Dhital, C., Khan, M. A., Saghayezhian, M., Phelan, W. A., Young, D. P., Jin, R. Y., & DiTusa, J. F. Effect of negative chemical pressure on the prototypical itinerant magnet MnSi. United States. https://doi.org/10.1103/physrevb.95.024407
Dhital, C., Khan, M. A., Saghayezhian, M., Phelan, W. A., Young, D. P., Jin, R. Y., and DiTusa, J. F. Mon .
"Effect of negative chemical pressure on the prototypical itinerant magnet MnSi". United States. https://doi.org/10.1103/physrevb.95.024407. https://www.osti.gov/servlets/purl/1535822.
@article{osti_1535822,
title = {Effect of negative chemical pressure on the prototypical itinerant magnet MnSi},
author = {Dhital, C. and Khan, M. A. and Saghayezhian, M. and Phelan, W. A. and Young, D. P. and Jin, R. Y. and DiTusa, J. F.},
abstractNote = {The evolution of the magnetic and charge transport properties of the itinerant magnetic metal MnSi with the substitution of Al and Ga on the Si site is investigated. We observe an increase in unit cell volume indicating that both Al and Ga substitutions create negative chemical pressure. There are substantial increases in the Curie temperature and the ordered moment demonstrating that the substitutions give the magnetism a stronger itinerant character. The substitutions also increase the range of temperature and field where the skyrmion phase is stable due to a change in the character of the magnetism. In contrast to the behavior of pure MnSi and expectations for the intrinsic anomalous Hall effect, we find a significant temperature dependence to the magnitude and sign of anomalous Hall conductivity constant in Al or Ga substituted samples. This temperature dependence likely reflects changes in the spin-orbit coupling strength with temperature, which may have significant consequences on the helical and skyrmion states. Finally, we observe a continuous evolution of magnetic and charge transport properties through positive to negative pressure.},
doi = {10.1103/physrevb.95.024407},
journal = {Physical Review B},
number = 2,
volume = 95,
place = {United States},
year = {Mon Jan 09 00:00:00 EST 2017},
month = {Mon Jan 09 00:00:00 EST 2017}
}
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