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.
|Number of pages||6|
|Publication status||Published - 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