INVESTIGATION OF ELECTROMAGNETIC WAVE ABSORPTION PROPERTIES OF Fe/La1.5Sr0.5NiO4 COMPOSITES

Abstract

In this paper, we propose an effective method to improve the broadband absorption performance of composite materials based on Fe magnetic metal nanoparticles. The capability of absorbing electromagnetic waves in the frequency range from 2-18 GHz of Fe-xLa_1,5Sr_0,5NiO₄ (Fe-xLSNO) composites is systematically investigated. Experimental results confirm that Fe-xLSNO composites not only maintain good broadband absorption (EAB) but also improve absorption performance. The Fe-xLSNO composites with LSNO replacement concentration up to 50% gives the lowest reflection loss value at the resonance peak reaching RL = -19.62 dB at f_R = 9.84 GHz and EAB = 10.56 GHz. On the other hand, the results also show the effect of shifting the resonance peak toward the high frequency region with increasing LSNO concentration. Our results contribute to the search for materials that absorption electromagnetic waves materials in the GHz frequency range based on the combination of magnetic metal nanoparticles with dielectrics.