Transport properties and point-contact spectra of NixNb1-x metallic glasses

A. Halbritter, O. Yu Kolesnychenko, G. Mihály, O. I. Shklyarevskii, H. Van Kempen

Research output: Contribution to journalArticle

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Abstract

Bulk resistivity and point contact spectra of NixNb1-x metallic glasses have been investigated as functions of temperature (0.3-300 K) and magnetic field (0-12 T). Metallic glasses in this family undergo a superconducting phase transition determined by the Nb concentration. When superconductivity was suppressed by a strong magnetic field, both the bulk sample R(T) and the point contact differential resistance curves of NixNb1-x showed logarithmic behavior at low energies, which is explained by a strong electron-"two level system" coupling. We studied the temperature, magnetic field, and contact resistance dependence of Ni44Nb56 point-contact spectra in the superconducting state and found telegraphlike fluctuations superimposed on superconducting characteristics. These R(V) characteristics are extremely sensitive detectors for slow relaxing "two level system" motion.

Original languageEnglish
Pages (from-to)5846-5849
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume61
Issue number9
Publication statusPublished - Mar 1 2000

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Point contacts
Metallic glass
metallic glasses
Transport properties
transport properties
Magnetic fields
magnetic fields
Contact resistance
Superconductivity
contact resistance
superconductivity
Phase transitions
Detectors
Temperature
electrical resistivity
temperature
Electrons
detectors
curves
electrons

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Transport properties and point-contact spectra of NixNb1-x metallic glasses. / Halbritter, A.; Kolesnychenko, O. Yu; Mihály, G.; Shklyarevskii, O. I.; Van Kempen, H.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 61, No. 9, 01.03.2000, p. 5846-5849.

Research output: Contribution to journalArticle

Halbritter, A. ; Kolesnychenko, O. Yu ; Mihály, G. ; Shklyarevskii, O. I. ; Van Kempen, H. / Transport properties and point-contact spectra of NixNb1-x metallic glasses. In: Physical Review B - Condensed Matter and Materials Physics. 2000 ; Vol. 61, No. 9. pp. 5846-5849.
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