Berlin 2012 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 33: Superconductivity, Measuring Devices, Matter at Low Temperature: Poster Session
TT 33.25: Poster
Wednesday, March 28, 2012, 15:00–19:00, Poster B
Synthesis, structural characterization and superconductivity in La2Sb — •Stephan Knöner, Elena Gati, Markus Kuhnt, Mariano de Souza, Amir Haghighirad, Wolf Aßmus, and Michael Lang — Physikalisches Institut, Goethe-Universität, D-60438 Frankfurt(M), Germany
The discovery of superconductivity in Fe-pnictides has attracted enormous interest to this class of materials [1]. In this contribution, we report on synthesis, structural characterization and magnetic properties of La2Sb. So far, only little is known on the superconductivity of La2Sb [2]. This compound possesses a layered quasi-2D structure and crystallizes in a tetragonal structure with space group I4/mmm, which is isostructural to the 122-family of the iron pnictides. Since La2Sb does not contain magnetic ions, it may serve as a reference material to explore the role of magnetic and structural degrees of freedom for superconductivity in iron-pnictides. EPMA and x-ray analyses indicate the phase purity of the samples, which show a superconducting transition at 4.6 K. We will discuss transport and magnetic properties of polycrystalline La2Sb samples as a function of temperature and will address the effect of hydrostatic pressure.
Y. Kamihara et al., J. Am. Chem. Soc. 130, 3296 (08)
H. Mizoguchi and H. Hosono, Chem. Commun., 47, 3778 (11)