Study on dielectric and magnetodielectric properties of Lu₃Fe₅O₁₂ ceramics

Abstract

Polycrystalline Lu₃Fe₅O₁₂ ceramics with garnet structure were prepared by a solid-state reaction method. A dielectric relaxor behavior at low temperature was observed which may come from the dipolar effects associated with the charge carrier hopping between Fe²⁺ and Fe³⁺. It is noticeable that their magnetodielectric (MD) properties are excellent since the applied small magnetic fields can dramatically change the dielectric constants of Lu₃Fe₅O₁₂ ceramics. The origin of the MD effect is discussed.