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TT: Fachverband Tiefe Temperaturen
TT 44: Poster Session Correlated Electrons
TT 44.10: Poster
Thursday, March 17, 2011, 10:00–13:00, P1
Magnetic properties of CeTPO (T = Co,Ru,Os) phosphides studied by muon spin relaxation — •Johannes Spehling1, Cornelius Krellner2, Hubertus Luetkens3, Til Dellmann1, Anton Jesche2, Christoph Geibel2, and Hans-Henning Klauss3 — 1Institut für Festkörperphysik, TU Dresden — 2Laboratory for Muon-Spin Spectroscopy, Paul Scherrer Institute, CH-5232, Villingen, Switzerland — 3Max-Planck-Institut für Chemische Physik fester Stoffe Dresden
We have investigated the magnetic ground state properties in the pnictide systems CeTPO with T = Co,Ru,Os by means of zero field (ZF) and weak transverse field muon spin relaxation (muSR). For CeCoPO, magnetic order of the Co-3d moments below 75 K is found as evidenced by the observation of a spontaneous muon spin precession frequency. A second muon frequency below 45 K suggests a spin reorientation transition. No clear indication for Ce-4f magnetic ordering is found. In contrast, for CeRuPO and CeOsPO ZF-muSR shows Ce-4f magnetic order below 15 K and 4.5 K, respectively. Here, no magnetic order of the d electronic moments is observed. This is consistent with macroscopic results [1-3]. For all systems, the temperature dependence of the magnetic order parameter (muon precession frequency) suggests a peculiar interplay between the transition metal d and rare earth Ce-4f electronic subsystems.
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