Effect of negative chemical pressure on the prototypical itinerant magnet MnSi

Dhital, C.; Khan, M. A.; Saghayezhian, M.; Phelan, W. A.; Young, D. P.; Jin, R. Y.; DiTusa, J. F.

doi:10.1103/physrevb.95.024407

Title: Effect of negative chemical pressure on the prototypical itinerant magnet MnSi

Journal Article · Mon Jan 09 00:00:00 EST 2017 · Physical Review B

DOI:https://doi.org/10.1103/physrevb.95.024407· OSTI ID:1535822

Dhital, C. ^[1]; Khan, M. A. ^[1]; Saghayezhian, M. ^[1]; Phelan, W. A. ^[1]; Young, D. P. ^[1]; Jin, R. Y. ^[1]; DiTusa, J. F. ^[1]

Louisiana State Univ., Baton Rouge, LA (United States)

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.

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Research Organization:: Louisiana State Univ., Baton Rouge, LA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0012432

OSTI ID:: 1535822

Alternate ID(s):: OSTI ID: 1338635

Journal Information:: Physical Review B, Vol. 95, Issue 2; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 21 works

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First-principles study of thermoelectric properties of Li-based Nowotony–Juza phases Chopra, Uday; Zeeshan, Mohd; Pandey, Shambhawi Journal of Physics: Condensed Matter, Vol. 31, Issue 50 https://doi.org/10.1088/1361-648x/ab4015	journal	September 2019
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Effect of Ge substitution on magnetic properties in the itinerant chiral magnet MnSi Aji, Seno; Ishida, Hidesato; Okuyama, Daisuke Physical Review Materials, Vol. 3, Issue 10 https://doi.org/10.1103/physrevmaterials.3.104408	journal	October 2019
Exploring the origins of the Dzyalloshinski-Moria interaction in MnSi Dhital, Chetan; DeBeer-Schmitt, Lisa; Zhang, Qiang arXiv https://doi.org/10.48550/arxiv.1707.05673	text	January 2017
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