Shandite type Co3Sn2S2 = Sn2Co3S2- story, structure, magnetism

International Conference on Metal, Mining and Magnetic Materials

November 01-02 , 2018 Paris , France

Richard Weihrich, Florian Pielnhofer

University of Augsburg, Germany University of Regensburg, Germany

ScientificTracks Abstracts: J Mat. Sci

DOI: 10.4172/2321-6212-C7-032

Abstract

Sn2Co3S2, a highly anisotropic S½ half metal ferromagnet (HFM) was just found as magnetic Weyl semimetal with intrinsic giant anomalous Hall Effect (AHE). The compounds was first prepared in our institute in 1979, predicted as HFM in 2001 and characterised as half antiperovskite SnCo3/2S. It crystallizes in shandite type structure i.e. Pb2Ni3S2. When its ferromagnetism with TC=176 K was investigated by DFT calculations, a fascinating half metal S=½ ground state was discovered. The prediction of the magnetic state was confirmed from experimental investigations on single crystals that have further shown a completely anisotropic out-of-plane magnetic ordering of spins in Kagomé-layers of Co atoms. Studies on its magnetism in the following decades finally led to the recent discoveries of topological properties and a giant anomalous hall effect. Here, we review the crystal and electronic structure of Sn2Co3S2=SnCo3/2S including the concept of half anti-perovskites (HAP) that was developed from the relation to MgNi3C..

Biography

R. Weihrich has completed his PhD at the age of 28 years at the University of Regensburg, followed by postdoctoral studies at CNRS Bordeaux, Paris, and Dresden. He is Professor at the University of Augsburg. He has published more than 75 papers in reputed journals.

E-mail: richard.weihrich@mrm.uni-augsburg.de

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