J. Phys. IV France
Volume 12, Numéro 9, November 2002
Page(s) 347 - 350

J. Phys. IV France
12 (2002) Pr9-347
DOI: 10.1051/jp4:20020434

Charge-density waves in Er 5Ir 4Si 10 type compounds

S. van Smaalen1, P. Daniels1, F. Galli2, R. Feyerherm3, E. Dudzik3, G.J. Nieuwenhuys2 and J.A. Mydosh2

1  Laboratory of Crystallography, University of Bayreuth, 95440 Bayreuth, Germany
2  Kamerlingh Onnes Laboratory, University of Leiden, Leiden, The Netherlands
3  HahnMeitner Institute, Berlin, Germany

X-ray diffraction with synchrotron radiation has been used to study the phase transitions in compounds M5Ir 4Si 10 with M a rare-earth metal. For M = Er, Ho and Er 0.84Lu 0.16 phase transitions have been found towards a combined commensurate/incommensurate state, that locks into a commensurate state at lower temperatures. For M = Lu and Er 0.66Lu 0.34 there is a single transition towards a commensurate state. The results are interpreted in terms of commensurate structural transitions that induce incommensurate CDWs.

© EDP Sciences 2002