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Atypical Raman Scattering on Magnetic Junctions in Metallic Nanowires

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Abstract

We fabricated arrays of parallel nanowires. Each of the nanowires consists of two different magnetic metals. Using Raman spectrometry, we studied the spectra that appear when a heterojunction between metals is illuminated by a laser and studied the effect of an external magnetic field on the spectra. We also measured the dependence of the intensity of the spectra on the position of the laser spot (in the region of heterojunctions) and on the radiation intensity and we hypothesized the threshold nature of excitation. Near the contact of two metals, the symmetry of the crystal lattice is broken due to amorphization, and a nonzero orbital momentum of the electrons appears. As a result, another radiative transition of electrons become allowed without spin flip, which is sensitive to the magnetic field.

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Funding

The presented study is performed within the state task of FSRC “Crystallography and Photonics” RAS and within the IMT RAS state task no. 075-01304-23-00.

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Authors and Affiliations

  1. Institute of Microelectronic Technology and High Purity Materials, Russian Academy of Sciences, Chernogolovka, Russia

    V. Krishtop, V. Korepanov & L. Fomin

  2. FSRC “Crystallography and Photonics”, Russian Academy of Sciences, 119333, Moscow, Russia

    D. Zagorskiy & I. Doludenko

Authors
  1. V. Krishtop
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  2. V. Korepanov
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  3. L. Fomin
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  4. D. Zagorskiy
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  5. I. Doludenko
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Correspondence to V. Krishtop or D. Zagorskiy.

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Krishtop, V., Korepanov, V., Fomin, L. et al. Atypical Raman Scattering on Magnetic Junctions in Metallic Nanowires. Russ Microelectron 52 (Suppl 1), S59–S66 (2023). https://doi.org/10.1134/S1063739723600589

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