NiSi: A New Venue for Antiferromagnetic Spintronics

Pousali Ghosh, Jiasen Guo, Feng Ye, Thomas Heitmann, Steven Kelley, Arthur Ernst, Vitalii Dugaev, Deepak K. Singh

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Envisaging antiferromagnetic spintronics pivots on two key criteria of high transition temperature and tuning of underlying magnetic order using straightforward application of magnetic field or electric current. Here, it is shown that NiSi metal can provide suitable new platform in this quest. First, the study unveils high-temperature antiferromagnetism in single-crystal NiSi with Néel temperature, TN ⩾ 700 K. Antiferromagnetic order in NiSi is accompanied by non-centrosymmetric magnetic character with small ferromagnetic component in the a–c plane. Second, it is found that NiSi manifests distinct magnetic and electronic hysteresis responses to field applications due to the disparity in two moment directions. While magnetic hysteresis is characterized by one-step switching between ferromagnetic states of uncompensated moment, electronic behavior is ascribed to metamagnetic switching phenomena between non-collinear spin configurations. Importantly, the switching behaviors persist to high temperature. The properties underscore the importance of NiSi in the pursuit of antiferromagnetic spintronics.

Original languageEnglish
Article number2302120
JournalAdvanced Materials
Volume35
Issue number31
DOIs
StatePublished - Aug 3 2023

Funding

P.G. and J.G. contributed equally to this work. D.K.S. thankfully acknowledges support from the U.S. Department of Energy, Office of Basic Energy Sciences under grant no. DE‐SC0014461. V.D. and A.E. performed theoretical analysis. V.D. acknowledges support from the National Science Center in Poland under the project no. DEC‐2017/27/B/ST3/02881. A.E. acknowledges funding by Fonds zur Förderung der Wissenschaftlichen Forschung (FWF) grant no. I 5384. The research conducted at ORNL's Spallation Neutron Source was supported by the Office of Basic Energy Sciences at DOE.

Keywords

  • antiferromagnetic metal
  • neutron scattering
  • spintronics
  • transition metal intermetallics

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