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µSR study of Al-0.67%Mg-0.77%Si alloys

Abstract

Zero-field muon spin relaxation measurements were carried out with Al-0.67%Mg- 0.77%Si alloys in the temperature range from 20 K to 300 K. Observed relaxation spectra were compared with the relaxation functions calculated by a Monte Carlo simulation with four fitting parameters: the dipolar width, trapping rate, detrapping rate and fraction of initially trapped muons. From the fitting, the temperature variations of the trapping rates reveal that there are three temperature regions concerning muon kinetics. In the low temperature region below 120 K, muons appeared to be trapped in a shallow potential yielded by dissolved Mg atoms, and thus little effect of heat treatment of the samples was observed, while in the mid and high temperature regions, the trapping rates clearly depended on the heat treatment of the samples suggesting muon-cluster and/or muon-vacancy interactions.

Category

Academic article

Client

  • Research Council of Norway (RCN) / 197405
  • Research Council of Norway (RCN) / 193619

Language

English

Author(s)

Affiliation

  • Toyama University
  • Norwegian University of Science and Technology
  • Riken
  • CCLRC Rutherford Appleton Laboratory
  • SINTEF Industry / Materials and Nanotechnology

Year

2014

Published in

Journal of Physics: Conference Series (JPCS)

ISSN

1742-6588

Publisher

IOP Publishing

Volume

551

Issue

1

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