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Seebeck coefficients of half-metallic ferromagnets
Authors:Benjamin Balke  Siham Ouardi  Tanja Graf  Joachim Barth  Christian GF Blum  Gerhard H Fecher  Andrey Shkabko  Anke Weidenkaff  Claudia Felser
Institution:1. Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany;2. EMPA, Swiss Federal Laboratories for Materials Testing and Research, Solid State Chemistry and Catalysis, CH-8600 Duebendorf, Switzerland;1. Laboratoire des matériaux magnétiques, Département de physique, Faculté des Sciences, Université Djillali LIABES, Sidi-Bel-Abbès 22000, Algeria;2. Département de physique, Faculté des Sciences, Université Hassiba BenBouali Chlef, Chlef 02000, Algeria;1. Department of Physics, National Taiwan University, Taipei 10617, Taiwan;2. Center for Theoretical Physics and Center for Quantum Science and Engineering, National Taiwan University, Taipei 10617, Taiwan;1. Spintronics Laboratory, Department of Physics, International Islamic University, Islamabad, Pakistan;2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, University of Chinese Academy of Sciences, (UCAS), Beijing 100190, China;3. Department of Physics and Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences, Islamabad, Pakistan;4. Department of Physics, Quaid-i-Azam University, Islamabad, Pakistan;1. Department of Physics, Indian Institute of Technology Bombay, Mumbai 400076, India;2. Instituto de Física “Gleb Wataghin”, Universidade Estadual de Campinas-UNICAMP, SP 6165, Campinas 13 083-859, Sao Paulo, Brazil;3. DCMPMS, Tata Institute of Fundamental Research, Mumbai 4000052, India;4. Magnetic Materials Unit, National Institute for Materials Science, Tsukuba 305-0047, Japan
Abstract:In this article the Co2 based Heusler compounds are discussed as potential materials for spin voltage generation. The compounds were synthesized by arc melting and consequent annealing. Band structure calculations were performed which revealed the compounds to be half-metallic ferromagnets. Magnetometry was performed on the samples and the Curie temperatures and the magnetic moments were determined. The Seebeck coefficients were measured from low to ambient temperatures for all compounds. For selected compounds high temperature measurements up to 900 K were performed.
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