Dresden 2011 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 11: Poster Session: Matter at Low Temperature
TT 11.5: Poster
Montag, 14. März 2011, 14:00–18:00, P4
(contribution withdrawn) Development of a CuBe cell for magnetostriction and thermal expansion measurements in the PPMS — •Thomas Bauer, Robert Küchler, Manuel Brando, and Frank Steglich — Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany
Thermal expansion and magnetostriction of solids give important information about the temperature and magnetic-field dependence of sample properties. Here, we report on the development of a cell designed to perform such kinds of measurements in the Physical Property Measurement System (PPMS) by Quantum Design. Due to limited sample space the biggest challenge to face was the miniaturisation of the cell. An entirely new concept of fabrication has been used to assure maximum resolution, easy and fast applicability and simple accessibility. We could achieve sensitivities equal to those of presently established thermal expansion measurement cells, i.e., within the range of Δ L = 10−1 to 10−2 Å[1]. For better thermal coupling and less influence of induced currents by the magnetic field, CuBe has been chosen as the adequate material.
First test measurements of thermal expansion as well as magnetostriction have been performed from room temperature to 5 K on single crystals of selected systems which show 1st and 2nd order phase transitions.
[1] R Pott and R Schefzyk 1983 J. Phys. E: Sci. Instrum. 16 444