Structural and magnetic study on the effect of substitution of cobalt by d-valent elements of Co2FeSi heusler alloy

• Published in: Key Engineering Materials
• Main Author: Saimin M.N.S.; Aziz S.S.S.A.; Ali A.M.M.; Hassan O.H.; Yahya M.Z.A.; Taib M.F.M.
• Format: Conference paper
• Language: English
• Published: Trans Tech Publications Ltd 2016
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84998812245&doi=10.4028%2fwww.scientific.net%2fKEM.708.37&partnerID=40&md5=045bbfa32574681bc8325c193ec1fe3d

In this paper, the effect of substitution of Co by d-valent elements such as Ag and Pt on electronic structure and magnetic properties of full Heusler type Co2FeSi alloys was investigated. Structural study reveals the presence of a small gap in the minority band structure around the vicinity of the Fermi level on Co2FeSi resulting to half-metallic behaviour. However, CoFeSiAg and CoFeSiPt cannot preserved the half-metalicity due to disappearing of the gap in the minority band structure due to the creation of new states around the Fermi level in the minority density of states. The variation in the magnetic moment of Co2FeSi with change of the atoms was attributed to the change in the local magnetic moment of atoms. © 2016 Trans Tech Publications, Switzerland.