Journal
PHYSICA B-CONDENSED MATTER
Volume 407, Issue 16, Pages 3274-3277Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physb.2011.12.085
Keywords
Ferrite; Microwave absorber; Electromagnetic property
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We present the results of the effect of Al substitution on the magnetic and electrical properties of Li0.2Zn0.6Fe2.2-xAlxO4 ferrites (0.0 <= x <= 0.5) prepared by the standard ceramic technique. The characterization has been performed using XRD, SEM, magnetic and dielectric response in frequency. XRD analysis confirms that the system exhibits polycrystalline single phase cubic spinel structure only for low dopant content. Doping decreases the dielectric loss tangent and the ferrite conductivity in more than two orders of magnitude in the whole analyzed frequency range. Attenuation has a maximum intensity (86 dB) near 90 MHz for x=0.4. The wider bandwidth at 20 dB (94.6 MHz) is for x=0.3. (C) 2012 Elsevier B.V. All rights reserved.
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