Determination of the reversible relaxation spectrum in metallic glasses

A. Böhönyey, L. Kiss

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The reversible relaxation spectrum of Fe40Ni40B20has been determined by measuring differential scanning calorimetry (DSC) endotherm peaks brought about by appropriate pre-anneals at selected temperatures. The procedure is based on the activation energy spectrum model, making use of the fact that, in a DSC experiment, the splitting parameter Δ of the two-level systems (TLSs) is equal to the energy absorbed or released in an elementary relaxation process. This enables us to determine the absolute number density of the TLSs as a function of the activation energy. The obtained spectrum of Fe40Ni40B20can be well described by an exponential function.

Original languageEnglish
Pages (from-to)491-497
Number of pages7
JournalPhilosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
Volume69
Issue number3
DOIs
Publication statusPublished - 1994

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Metallic glass
metallic glasses
Differential scanning calorimetry
heat measurement
Activation energy
activation energy
scanning
Exponential functions
exponential functions
Relaxation processes
energy spectra
Experiments
Temperature
temperature
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Chemical Engineering(all)

Cite this

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AU - Böhönyey, A.

AU - Kiss, L.

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AB - The reversible relaxation spectrum of Fe40Ni40B20has been determined by measuring differential scanning calorimetry (DSC) endotherm peaks brought about by appropriate pre-anneals at selected temperatures. The procedure is based on the activation energy spectrum model, making use of the fact that, in a DSC experiment, the splitting parameter Δ of the two-level systems (TLSs) is equal to the energy absorbed or released in an elementary relaxation process. This enables us to determine the absolute number density of the TLSs as a function of the activation energy. The obtained spectrum of Fe40Ni40B20can be well described by an exponential function.

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