Berlin 2012 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 45: Correlated Electrons: Poster Session
TT 45.7: Poster
Donnerstag, 29. März 2012, 15:00–19:00, Poster B
Annealing effects in the antiferroquadrupolar compound U(Pd1−xPtx)3 — •Dirk Schulze Grachtrup1, Kerstin Westkämper1, Markus Schäpers1,2, Matthias Bleckmann1,3, Stefan Süllow1, and Keith A. McEwen4 — 1Institut für Physik der Kondensierten Materie, TU Braunschweig, Braunschweig, Germany — 2Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Dresden, Germany — 3Wehrwissenschaftliches Institut für Werk- und Betriebsstoffe, Erding, Germany — 4University College London, London, United Kingdom
The double hexagonal compound UPd3 undergoes several successive phase transitions to antiferroquadrupolar (AFQ) ordered phases below 8 K. Measurements of UPd3 in magnetic fields reveal a complex response of these AFQ phases to the applied field, leading to a rich magnetic phase diagam [1-3].
Doping of UPd3 with Pt leads to a rapid suppression of the ordered phases in U(Pd1−xPtx)3. Recent studies of single crystalline U(Pd1−xPtx)3 in the regime x ≤ 0.01 revealed a strong reduction of the ordering temperatures with doping. At x=0.005 ordering temperatures are reduced to about one half compared to those of pure UPd3. For x=0.01 the AFQ order is almost completely suppressed. Here, we present the effects of annealing on specific heat and resitivity of single crystalline samples of U(Pd1−xPtx)3.
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