Berlin 2008 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 15: Superconductivity: Poster Session
TT 15.3: Poster
Dienstag, 26. Februar 2008, 14:00–18:00, Poster B
Film growth and anisotropic behaviour of the critical field in epitaxial LuxHo1−xNi2B2C thin films — •Tim Niemeier, Ruben Hühne, Ludwig Schultz, and Bernhard Holzapfel — IFW Dresden, P.O. Box 270116, 01171 Dresden
The research on Rare Earth Nickel Borocarbides has led to a number of new conclusions about superconductivity, particularly in regard to the interdependency with magnetic influences. Recently, it was concluded by Wälte et al. from specific heat measurements and thermodynamic simulations that LuNi2B2C provides a non-magnetic corresponding partner of HoNi2B2C [1].
Complementary to single crystal growth, we use pulsed laser deposition for the sample preparation. In the past, particularly the anisotropy of the upper critical field could be successfully measured using thin film samples [2]. We prepared epitaxial thin films of alloys of LuxHo1−xNi2B2C for different x for the investigation of the transition temperature and the upper critical field. Especially we discuss the anisotropic behaviour above as well as below the magnetic ordering temperature known from HoNi2B2C providing numerical fitting results for different simple models.
[1] Wälte, A: Doctoral thesis, TU Dresden 2007
[2] Wimbush, S. C., L. Schultz, and B. Holzapfel: Angular anisotropy of the upper critical field in YNi2B2C. Physica C 408-10 (2004): 83-84.