Structure and static magnetic properties of Zr-substituted NiZn ferrite thin films synthesized by sol-gel process

摘要

Zr-substituted NiZn ferrite thin films, Ni_(0.5)Zn_(0.5)Zr_xFe_(2-x)O_4 (0 <= x <= 0.2), were synthesized by sol-gel process. The structure and magnetic properties of Ni0.5Zn_(0.5)ZrxFe_(2-x)O_4 ferrite thin films have been investigated. The diffraction peak shifted towards the lower angle and the lattice parameter increased with Zr substitution. The average grain size of Zr-substituted NiZn ferrtie thin films increased with Zr substitution. The saturation magnetization gradually increased with the increase of Zr substitution when x<=0.10, and decreased when x>0.10. Meanwhile, the coercivity initially decreased with the increase of Zr substitution when x <= 0.10, and increased when x > 0.10.