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MA: Fachverband Magnetismus

MA 3: Magnetic Heuslers, Half-metals and Oxides (jointly with TT)

MA 3.1: Vortrag

Montag, 16. März 2015, 09:30–09:45, H 0112

Half-metallic compensated ferrimagnetic behaviour of Mn_1.5V_0.5FeAl 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 Mn_1.5V_0.5FeAl 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)