Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 11: Magnetic Heuslers, Half-Metals and Oxides (jointly with MA)
TT 11.1: Vortrag
Montag, 16. März 2015, 09:30–09:45, H 0112
Half-metallic compensated ferrimagnetic behaviour of Mn1.5V0.5FeAl Heusler compound — •Rolf Stinshoff, Peter Adler, Gerhard Fecher, and Claudia Felser — Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
Half-metals, i.e. materials exhibiting 100 % spin polarization, naturally attract much interest in spintronics [1]. Some of them have already shown their potential in applications such as magnetic tunneling junctions. Despite the very high TMR ratios achieved at low temperatures using half-metallic materials, further technological requirements, such as low stray fields, temperature stability etc., still have to be improved. In this context, some advantages are provided by the group of completely compensated ferrimagnets which still keep the half-metallicity. Several of them were predicted theoretically within the Heusler family. Here we will discuss the experimentally measured characteristics (structural, magnetic and transport properties) of the newly synthesized Mn1.5V0.5FeAl Heusler material, which is suggested to be a fully compensated half-metallic ferromagnet by the first principle calculations [2].
[1] R. A. de Groot, F. M. Müller, P. G. van Engen, K. H. J. Buschow, Phys. Rev. Lett. 50, 2024-2027 (1983)
[2] S. Wurmehl, H. C. Kandpal, G. H. Fecher, C. Felser, J. Phys. Condens. Matter 18, 6171-6181 (2006)