First Principles Investigation of the Influence of Varied Cr Atom on Band Structure and Magnetic Moment of Rutile SnO2

Authors: Funmilayo  Ayedun, Etido P. Inyang  and Efiong A. Ibanga Received 18 November 2020/Accepted 24 December 2020 The electronic and magnetic properties of SnO2 doped with various compositions of chromium atoms are reported. Studies on magnetic property of CrxSn1-xO2 compounds features possible room temperature ferromagnetism which increased nonlinearly as Sn atom is replaced with Cr atom, at x = 0.25( 1.9976 ), x =  0.50 ( 3.9309 ), x = 0.75( 5.8831 ) and x = 1.00 (7.821 ). The magnetic moment and bandgap energy of undiluted SnO2 were compared at x = 0. The addition of Cr atom into SnO2 enhanced the shift from pure binary nonmetallic system to ternary metallic compound. The direct energy gaps decrease from x = 0 to 0.5, and increase from x = 0.75 to 1.0