Giant magnetodielectric effect and magnetic field tunable dielectric resonance in spinel MnZn ferrite
نویسندگان
چکیده
The sensitive response of the dielectric permittivity under the application of magnetic fields in Mn0.60Zn0.40Fe2.12O4+ polycrystalline ferrite is presented. A magnetic field of 3.5 kOe induced a giant magnetodielectric MD= H − 0 / 0 response, of 1800% at f =7 MHz, at room temperature. The ferrite exhibits a large magnetic field-induced frequency response of 180 Hz/Oe. We suggest that this effect arises primarily from a spin-dependent space charge polarization mechanism in response to the application of dc magnetic fields. © 2009 American Institute of Physics. DOI: 10.1063/1.3095498
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