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Magnetic, structural, and transport properties of the Heusler alloys Co 2 MnSi and NiMnSb
Abstract
We report on structural, magnetic, transport, and spin-polarization measurements of the Heusler alloys ${\mathrm{Co}}_{2}\mathrm{MnSi}$ and NiMnSb. Laue diffraction patterns confirm the single-crystal nature of ${\mathrm{Co}}_{2}\mathrm{MnSi}.$ Room-temperature transport measurements show a negative magnetoresistance in NiMnSb. Point-contact Andreev reflection measurements of the spin polarization yield polarization values for ${\mathrm{Co}}_{2}\mathrm{MnSi}$ and NiMnSb of 56% and 45%, respectively. Temperature dependence of resistivity for ${\mathrm{Co}}_{2}\mathrm{MnSi}$ reveals a relatively large residual resistivity ratio $({\ensuremath{\rho}}_{293\mathrm{K}}/{\ensuremath{\rho}}_{5\mathrm{K}})$ typical of single-crystal Heusler alloys. In NiMnSb, resistivity and magnetization as a function of temperature show evidence of a magnetic phase transition near 90 K.
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The observed negative LMR is not due to magnetic materials because TaAs samples are non-magnetic.
“First, it is well-known that a negative LMR can arise in magnetic materials28. This obviously does not apply to our non-magnetic TaAs samples.”
From Signatures of the Adler–Bell–Jackiw chiral anomaly in a Weyl fermion semimetal (2016) · cites this paper as [28]
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Cited by
Sorted by citations
Signatures of the Adler–Bell–Jackiw chiral anomaly in a Weyl fermion semimetal
Zhang, C.-L., Xu, S.-Y., Belopolski, I., Yuan, Z., Lin, Z., Tong, B., Bian, G., Alidoust, N., Lee, C.-C., Huang, S.-M., et al. (2016) · Nature Communications · doi:10.1038/ncomms10735 · Cited by 760
Gate-tunable negative longitudinal magnetoresistance in the predicted type-II Weyl semimetal WTe2
Wang, Y., Liu, E., Liu, H., Pan, Y., Zhang, L., Zeng, J., Fu, Y., Wang, M., Xu, K., Huang, Z., et al. (2016) · Nature Communications · doi:10.1038/ncomms13142 · Cited by 280
Metadata
- Authors
- Ritchie, L., Xiao, G., Ji, Y., Chen, T. Y., Chien, C. L., Zhang, M., Chen, J., Liu, Z., Wu, G., & Zhang, X. X.
- Affiliations
- Brown University (US)
- Johns Hopkins University (US)
- Chinese Academy of Sciences (CN)
- Hong Kong University of Science and Technology (HK)
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2003-09-29
- Volume
- 68
- Issue
- 10
- ISSN
- 0163-1829 (ISSN-L)
- 1095-3795
- OpenAlex
- W2013101486
- Cited by
- 257
- References
- 0
- Citations by year
- 2026: 11 · 2025: 10 · 2024: 10 · 2023: 20 · 2022: 8 · 2021: 15 · 2020: 15 · 2019: 12 · 2018: 12 · 2017: 8 · 2016: 9 · 2015: 17 · 2014: 9 · 2013: 12 · 2012: 6
- FWCI
- 8.13
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Physical review. B, Condensed matter (publishedVersion)
- Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
- Funders
- National Science Foundation (0306711, 0080031)
- Hong Kong University of Science and Technology
- Division of Materials Research
- Topics
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Heusler alloys: electronic and magnetic properties
- Physical Sciences › Materials Science › Materials Chemistry › Shape Memory Alloy Transformations
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Magnetic and transport properties of perovskites and related materials
- Keywords
- Heusler alloys, Co2MnSi, NiMnSb, negative magnetoresistance, spin polarization, point contact Andreev reflection, residual resistivity ratio, magnetic phase transitions, single crystals, electrical transport, magnetization
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