Anomalous Hall effect in nanoscale structures of the antiferromagnetic Weyl semimetal Mn3Sn at room temperature

Matsuo, Takumi; Higo, Tomoya; Nishio-Hamane, Daisuke; Nakatsuji, Satoru

doi:10.1063/5.0095819

Anomalous Hall effect in nanoscale structures of the antiferromagnetic Weyl semimetal Mn₃Sn at room temperature

Journal Article · Wed Jul 06 00:00:00 EDT 2022 · Applied Physics Letters

DOI:https://doi.org/10.1063/5.0095819· OSTI ID:1979102

^[1]; ^[2]; Nishio-Hamane, Daisuke ^[3]; ^[4]

Univ. of Tokyo (Japan); University of Tokyo (Japan)
Univ. of Tokyo (Japan); Japan Science and Technology Agency (JST), Saitama (Japan). CREST
Univ. of Tokyo (Japan)
Univ. of Tokyo (Japan); Japan Science and Technology Agency (JST), Saitama (Japan). CREST; Johns Hopkins Univ., Baltimore, MD (United States)

The magnetic Weyl semimetallic state in the chiral antiferromagnet Mn₃Sn has attracted interest for its potential in memory technology. Despite vanishingly small magnetization, the material exhibits large transverse responses that can be electrically manipulated, similar to ferromagnets. Through deposition on heated Si/SiO₂ substrates, we have fabricated polycrystalline Mn₃Sn films that have coarse surfaces, the thinner of which have a discontinuous structure comprised of grains with diameters of the order of 100 nm. Here we confirm that these grains retain the anomalous Hall effect arising in the time reversal symmetry broken chiral antiferromagnetic phase of Mn₃Sn at room temperature by serially connecting the grains with an additional conducting layer. These results pave the path for the potential applications of nanoscale Mn₃Sn systems, which could be useful in the development of energy efficient memory devices.

View Accepted Manuscript (DOE)

Research Organization:: Johns Hopkins Univ., Baltimore, MD (United States); Energy Frontier Research Centers (EFRC) (United States). Institute for Quantum Matter (IQM)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Japan Science and Technology Agency (JST) (CREST); Japan Society for the Promotion of Science (JSPS) (KAKENHI)

Grant/Contract Number:: SC0019331

OSTI ID:: 1979102

Alternate ID(s):: OSTI ID: 1874988

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 1 Vol. 121; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Anomalous Hall effect in nanoscale structures of the antiferromagnetic Weyl semimetal Mn3Sn at room temperature

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Anomalous Hall effect in nanoscale structures of the antiferromagnetic Weyl semimetal Mn₃Sn at room temperature