1Department of Electronics and Communication Engineering, Baba Kuma Singh Ji Engineering College, Amritsar-143107, India
2Department of Electronics and Communication Engineering, Beant College of Engineering and Technology, Gurdaspur-14352, India
3Department of Applied Science, Baba Kuma Singh Ji Engineering College, Amritsar-143107, India
4Department of Electronics and Technology, Guru Nanak Dev University, Amritsar-143005, India
In order to study the effect of La substitution on microwave and electrical properties of strontium hexaferrite, a series of samples with composition Sr1-xLax Fe12O19 (x = 0, 0.10, 0.20 and 0.30) were prepared by standard ceramic processing technique. The DC electrical conductivity of doped and undoped samples was measured at different temperatures. DC electrical conductivity results show having conductivity with an increase in temperature. This indicates magnetic semiconductor behavior of the samples. The variation of reflection loss has been studied as a function of frequency (f), La3+ content (x) and thickness of the absorber. A maximum reflection loss of -19.9 dB is obtained for sample with x = 0.0 and absorber thickness of 3 mm and 3.5 mm.
M-type hexaferrites, microwave absorption, dc conductivity
