RF second-harmonic generation and PC spectroscopy of Ni-Nb metallic glasses

O. P. Balkashin, I. K. Yanson, A. Halbritter, G. Mihály

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The PC spectra (energy dependences of the second harmonic of modulating current) of metallic glasses NixNb1-x were measured at audio (3726 Hz) and microwave (9.5 GHz) frequencies. The dynamic high-frequency experiments display for the first time, that the spectral singularity at small cherries caused by electron scattering on two-level systems (TLS) does exist at RF frequencies. It is the direct evidence of the existence of a fast relaxation process with characteristic time τ ≪ 10-10 s in the contacts. A small contribution from a more sluggish scattering process takes place as well. It is found that a component due to the nonequilibrium steady-state occupation of the TLS levels is present in the videodetection signal at microwave irradiation. The efficiency of point-contact waveguide and RF receiver couplings is evaluated as aqualing 5-7%. The small minimum of the resistance at zero-biases observed for some contacts is connected with the superconducting fluctuations of the order parameter at T ∼ 2,3 Tc.

Original languageEnglish
Pages (from-to)1386-1394
Number of pages9
JournalLow Temperature Physics
Volume27
Issue number12
Publication statusPublished - Dec 2001

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metallic glasses
harmonic generations
spectroscopy
microwaves
occupation
electron scattering
energy spectra
receivers
waveguides
harmonics
irradiation
scattering

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

RF second-harmonic generation and PC spectroscopy of Ni-Nb metallic glasses. / Balkashin, O. P.; Yanson, I. K.; Halbritter, A.; Mihály, G.

In: Low Temperature Physics, Vol. 27, No. 12, 12.2001, p. 1386-1394.

Research output: Contribution to journalArticle

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