Physik der kondensierten Materie

, Volume 9, Issue 1–2, pp 21–22 | Cite as

De Haas-van Alphen studies of electron-scattering in dilute copper-based alloys

  • I. M. Templeton
  • P. T. Coleridge
  • L. -F. Chollet
Article

Abstract

We have used the de Haas-van Alphen (dHvA) effect to study the relaxation times of “neck” and “belly” electrons in copper containing a range of dilute heterovalent and transition-metal solutes. The scattering (Dingle) temperaturex is derived from the variation of signal amplitude with magnetic field at a fixed temperature. Values ofx are believed accurate to within 0.1°K in a range ofxN(neck) from ≃0.4°K to ≃6°K andxB(belly) from ≃0.2°K to ≃3°K. Our results may be summarized as follows:Heterovalent solutes (Zn, Cd, Al; up to 0.1 at. %)\(x_N \simeq 22^\circ K/at.{\mathbf{ }}\% {\mathbf{ }}for{\mathbf{ }}Zn,{\mathbf{ }}Cd;{\mathbf{ }} \simeq {\mathbf{ }}95^\circ K/at.{\mathbf{ }}\% {\mathbf{ }}for{\mathbf{ }}Al.{\mathbf{ }}x_N /x_B \simeq 1.2\).Transition-metal solutes (Ni, Co, Fe, Mn, Cr; up to 0.05 at.-%)\(x_N \simeq 22^\circ K/at.{\mathbf{ }}\% {\mathbf{ }}for{\mathbf{ }}Ni,{\mathbf{ }}Mn;{\mathbf{ }} \simeq {\mathbf{ }}95^\circ K/at.{\mathbf{ }}\% {\mathbf{ }}for{\mathbf{ }}Fe,{\mathbf{ }}Cr;{\mathbf{ }} \simeq {\mathbf{ }}70{\mathbf{ }}^\circ K/at.{\mathbf{ }}\% {\mathbf{ }}for{\mathbf{ }}Co.{\mathbf{ }}x_N /x_B \simeq 0.5{\mathbf{ }}for{\mathbf{ }}Ni,{\mathbf{ }}Mn;{\mathbf{ }} \simeq {\mathbf{ }}0.3{\mathbf{ }}for{\mathbf{ }}Fe,{\mathbf{ }}Cr;{\mathbf{ }} \simeq {\mathbf{ }}0.4{\mathbf{ }}for{\mathbf{ }}Co.\).

An anomalous dependence of dHvA amplitude on magnetic field has been observed for belly oscillations in several very dilute Cu Cr alloys. This anomaly is both concentration and temperature-sensitive, and is probably related to the Kondo effect.

Keywords

Copper Spectroscopy Magnetic Field Neural Network State Physics 

Copyright information

© Springer-Verlag 1969

Authors and Affiliations

  • I. M. Templeton
    • 1
  • P. T. Coleridge
    • 1
  • L. -F. Chollet
    • 1
  1. 1.Division of Pure PhysicsNational Research CouncilOttawaCanada

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