High-pressure μSR studies of ferro- and antiferromagnetic metals

Th Stammler, T. Grund, A. B. Kaiser, J. Major, A. Röck, R. Scheuermann, L. Schimmele, A. Seeger

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Abstract

High-pressure μSR experiments on ferromagnetic nickel and α-iron and antiferromagnetic chromium are reported. In Ni above 260 K BFermi was found to be proportional to the saturation magnetization, whereas at lower temperatures it is temperature independent apart from a small anomaly below 30 K which is presumably caused by a magnetoelastic interaction. There was no evidence for an occupation of metastable sites by the μ+ below the Curie temperature. By contrast, in α-Fe the temperature dependence of ∂Bμ/∂p shows a structure which might be attributed to the occupation of excited muon states at elevated temperatures. High-pressure zero-field experiments on Cr performed in the temperature regime between 4.5 K and 8 K revealed a pressure dependence of Bμ as large as ∂Bμ/∂p = -(89.15±0.06) × 10-12 T/Pa. In terms of volume dependence a very large negative Grüneisen parameter γ = -27 was obtained.

Original languageEnglish
Pages (from-to)331-336
Number of pages6
JournalHyperfine Interactions
Volume104
Issue number1-4
Publication statusPublished - Dec 1 1997

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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    Stammler, T., Grund, T., Kaiser, A. B., Major, J., Röck, A., Scheuermann, R., Schimmele, L., & Seeger, A. (1997). High-pressure μSR studies of ferro- and antiferromagnetic metals. Hyperfine Interactions, 104(1-4), 331-336.