J. Phys. IV France 12 (2002) Pr9-347
Charge-density waves in Er 5Ir 4Si 10 type compoundsS. 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.
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