Electrical conductivity of Ba–Co–Ti hexagonal ferrites

• Published in: Journal of alloys and compounds Vol. 364; no. 1; pp. 17 - 22
• Main Authors: Ravinder, D, Shalini, P, Mahesh, P, Koteswara Rao, K, Vithal, M, Boyanov, B.S
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 11.02.2004; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Conductivity phenomena in semiconductors and insulators; Electrical transport; Electronic transport in condensed matter; Exact sciences and technology; Ferrites; Low-field transport and mobility; piezoresistance; Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.); Magnetic properties and materials; Magnetically ordered materials; Magnetically ordered materials: other intrinsic properties; Oxide materials; Physics; Ferrites; Oxide materials; Electrical transport; Magnetically ordered materials; Hexagonal ferrites; Electrical conductivity; Curie point; Fenites; Experimental study; Lattice parameters; Magnetic transitions; Ferrimagnetic materials; Transition elements; Paramagnetic materials; Activation energy
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/S0925-8388(03)00543-7

The electrical conductivity of cobalt and titanium substituted barium hexagonal ferrites of different compositions has been investigated as a function of composition and temperature. Plots of log( σT) versus 10 3/ T are almost linear and show a transition near the Curie temperature. The activation energy in the ferrimagnetic region is in general less than that in the paramagnetic region. An attempt is made to explain the conduction mechanism in Ba–Co–Ti ferrites.