Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 48: Poster Session II
MA 48.57: Poster
Donnerstag, 10. März 2016, 15:00–18:00, Poster B1
Thermal expansion and magnetostriction studies on R2PdSi3(R = Ho, Dy) single crystals — •Binh Tran1, Wolfgang Löser2, Chongde Cao3, and Rüdiger Klingeler1 — 1Kirchhoff Institute of Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany — 2Leibniz Institute for Solid State and Materials Research IFW Dresden, Helmholtzstr.20, 01069 Dresden, Germany — 3Department of Applied Physics, Northwestern Polytechnical University, Xian 710072, P.R. China
The magnetic behavior of hexagonal R2PdSi3 (R = Ho, Dy) single crystals has been studied by means of capacitance dilatometry. The materials show antiferromagnetic order below TN = 7.9 K (R = Ho) resp. TN = 7.5 K (R = Dy) as indicated by pronounced anomalies in the uniaxial thermal expansion coefficients αa and αc. In addition, the data imply significant length changes well above TN which are interpreted in terms of evolution of short range magnetic order. The application of an external magnetic field along the easy-axis leads to a transition from the antiferromagnetic order into a ferrimagnetic order. Magnetostriction measurements below TN reveal further metamagnetic transitions which will be used to determine and to discuss the magnetic phase diagram.