Synthesis of Cu-modified Co(2)Z hexaferrite with planar structure by a citrate precursor method

Co(2)Z hexaferrite is a planar anisotropic iron oxide which can present hig h values of permeability at high frequency. In this paper, Cu-modified Co-2 -Z hexaferrites powders were synthesized at a low temperature using a citra te precursor method. The formation of Z-type phases was characterized by X- ray diffraction and magnetization measurements. It is found that phase form ation temperature and sintering temperature were influenced directly by the content of copper. The effects of Cu-substitution on the microstructure an d high frequency properties of the ceramics have been investigated. (C) 200 1 Elsevier Science B.V. All rights reserved.