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

Research output: Contribution to journalArticle

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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 - 1997

Fingerprint

Metals
occupation
metals
Temperature
pressure dependence
temperature
Curie temperature
muons
chromium
nickel
anomalies
saturation
iron
Chromium
Saturation magnetization
magnetization
temperature dependence
Nickel
Excited states
Iron

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Nuclear and High Energy Physics
  • Physical and Theoretical Chemistry

Cite this

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

High-pressure μSR studies of ferro- and antiferromagnetic metals. / Stammler, Th; Grund, T.; Kaiser, A. B.; Major, J.; Röck, A.; Scheuermann, R.; Schimmele, L.; Seeger, A.

In: Hyperfine Interactions, Vol. 104, No. 1-4, 1997, p. 331-336.

Research output: Contribution to journalArticle

Stammler, T, Grund, T, Kaiser, AB, Major, J, Röck, A, Scheuermann, R, Schimmele, L & Seeger, A 1997, 'High-pressure μSR studies of ferro- and antiferromagnetic metals', Hyperfine Interactions, vol. 104, no. 1-4, pp. 331-336.
Stammler T, Grund T, Kaiser AB, Major J, Röck A, Scheuermann R et al. High-pressure μSR studies of ferro- and antiferromagnetic metals. Hyperfine Interactions. 1997;104(1-4):331-336.
Stammler, Th ; Grund, T. ; Kaiser, A. B. ; Major, J. ; Röck, A. ; Scheuermann, R. ; Schimmele, L. ; Seeger, A. / High-pressure μSR studies of ferro- and antiferromagnetic metals. In: Hyperfine Interactions. 1997 ; Vol. 104, No. 1-4. pp. 331-336.
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AB - 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.

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