A μSR study of the 1 K phase transition in the heavy electron compound UCu5

A. Schenck1, P. Birrer1, Z. Fisk2, F. N. Gygax1, B. Hitti1, E. Lippelt1, H. R. Ott3, M. Weber1
1Institut für Mittelenergiephysik der ETH Zürich, Villigen PSI, Switzerland
2Los Alamos National Laboratory, Los Alamos, USA
3Laboratorium für Festkörperphysik der ETH Zürich, Zürich, Switzerland

Tóm tắt

The 1 K phase transition in UCu5, which shows up in specific heat data within the antiferromagnetic state belowT N =16 K, was investigated by zero field μSR. The data reveal a pronounced increase in the internal field spread at theμ + sites below 1.2 K while the average fields seem to be unaffected. These results are compatible with the onset of a charge density wave state below 1.2 K.

Từ khóa


Tài liệu tham khảo

H.R. Ott et al., Phys. Rev. Lett. 55 (1985) 1595. A. Schenck, P. Böni et al., to be published. W.L. McMillan. Phys. Rev. B14 (1976) 1496. S. Barth et al., J. Magn. Magn. Mat. 76, 77 (1988) 455.