Atypical Raman Scattering on Magnetic Junctions in Metallic Nanowires

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...

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Bibliographic Details
Published inRussian microelectronics Vol. 52; no. Suppl 1; pp. S59 - S66
Main Authors Krishtop, V., Korepanov, V., Fomin, L., Zagorskiy, D., Doludenko, I.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.12.2023
Springer Nature B.V
Subjects
Amorphization
Crystal lattices
Devices: Magnetics
Electrical Engineering
Electron spin
Electrons
Engineering
Heterojunctions
Magnetic fields
Nanowires
Radiant flux density
Raman spectra
ferromagnetic transitions
Raman spectrometry
THz radiation
nanowire arrays
s-d exchange interaction
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Summary: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.
ISSN:1063-7397
1608-3415
DOI:10.1134/S1063739723600589