Large linear non-saturating magnetoresistance and high mobility in ferromagnetic MnBi

He Y, Gayles J, Yao M, Helm T, Reimann T, Strocov VN, Schnelle W, Nicklas M, Sun Y, Fecher GH, Felser C (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Nature Communications Nature Publishing Group: Nature Communications

Book Volume: 12

Article Number: 4576

Journal Issue: 1

DOI: 10.1038/s41467-021-24692-7

Abstract

A large non-saturating magnetoresistance has been observed in several nonmagnetic topological Weyl semi-metals with high mobility of charge carriers at the Fermi energy. However, ferromagnetic systems rarely display a large magnetoresistance because of localized electrons in heavy d bands with a low Fermi velocity. Here, we report a large linear non-saturating magnetoresistance and high mobility in ferromagnetic MnBi. MnBi, unlike conventional ferromagnets, exhibits a large linear non-saturating magnetoresistance of 5000% under a pulsed field of 70 T. The electrons and holes’ mobilities are both 5000 cm2V−1s−1 at 2 K, which are one of the highest for ferromagnetic materials. These phenomena are due to the spin-polarised Bi 6p band’s sharp dispersion with a small effective mass. Our study provides an approach to achieve high mobility in ferromagnetic systems with a high Curie temperature, which is advantageous for topological spintronics.

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Helmholtz-Zentrum Dresden-Rossendorf (HZDR) DE Germany (DE) Paul Scherrer Institute (PSI) CH Switzerland (CH)

How to cite

APA:

He, Y., Gayles, J., Yao, M., Helm, T., Reimann, T., Strocov, V.N.,... Felser, C. (2021). Large linear non-saturating magnetoresistance and high mobility in ferromagnetic MnBi. Nature Communications, 12(1). https://doi.org/10.1038/s41467-021-24692-7

MLA:

He, Yangkun, et al. "Large linear non-saturating magnetoresistance and high mobility in ferromagnetic MnBi." Nature Communications 12.1 (2021).

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