Volume 51, Number 4, August II 2000
|Page(s)||427 - 433|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 September 2002|
Persistence of a non-antiphase modulated magnetic structure to in the heavy electron compound
Commissariat à l'Energie Atomique, DRECAM/SPEC
91191 Gif-sur-Yvette, France
2 Université de Nancy I - 54506 Vandoeuvre-lès-Nancy, France
3 Commissariat à l'Energie Atomique, DRFMC/SPSMS 38054 Grenoble Cedex 9, France
4 II. Physikalisches Institut, Universität zu Köln Zülpicher Str. 77, 50937 Köln, Germany
5 Max Planck Institut for Chemical Physics of Solids 1187 Dresden, Germany
Accepted: 5 June 2000
Measurements by 170Yb Mössbauer spectroscopy down to 0.025 K and by neutron diffraction down to 1.7 K have been performed in the heavy electron compound YbPtAl (). At 0.025 K, the Mössbauer spectrum evidences a non-square modulation of the magnetic moment, incommensurate with the lattice spacings. This is the first clear example of a Kramers local moment Yb-based system where the Kondo singlet ground state allows a modulated magnetic structure to persist to K. The 3rd- and 5th-order harmonics of the modulation could be measured, and their thermal variation was followed from 0.025 K to 5 K. An abrupt decrease of both harmonics at 3 K is concomitant with a peak in the specific heat, suggesting a first-order phase transition where the modulation transforms into a pure sine wave.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 75.30.Fv – Spin-density waves / 76.80.+y – Mössbauer spectroscopy; other γ-ray spectroscopy
© EDP Sciences, 2000
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.