Analysis of crystal structure and reflection loss of material based on La0.7Sr0.3Mn1-x(Ni, Ti)x/2O3 (x=0.1, 0.3, and 0.5) applications for microwave absorbers

Sitti Ahmiatri Saptari (Department of Physics, Faculty of Science and Technology, Syarif Hidayatullah Islamic State University, Ir. H. Djuanda St, No. 95, Ciputat, South Tangerang, Banten 15412, Indonesia)
Nada Hashida Lathifah (Department of Physics, Faculty of Science and Technology, Syarif Hidayatullah Islamic State University, Ir. H. Djuanda St, No. 95, Ciputat, South Tangerang, Banten 15412, Indonesia)
Arif Tjahjono (Department of Physics, Faculty of Science and Technology, Syarif Hidayatullah Islamic State University, Ir. H. Djuanda St, No. 95, Ciputat, South Tangerang, Banten 15412, Indonesia)
Deni Shidqi Khaerudini (Research Center for Physics, National Research and Innovation Agency, Puspitek-Serpong, South Tangerang, Banten 15314, Indonesia)

Journal of Physics: Theories and Applications
Vol 6, No 2 (2022): Journal of Physics: Theories and Applications

In this research, structural engineering of lanthanum manganite material based on La0.7Sr0.3Mn1-x(Ni,Ti)x/2O3 (x = 0.1; 0.3 and 0.5) was synthesized using the sol-gel method. The prepared samples were then characterized using X-ray Diffraction (XRD) and Vector Network Analyzer (VNA). X-Ray Diffraction (XRD) characterization results obtained a single. Substitution of Ni and Ti ions with a concentration of x = 0.1; 0.3; and 0.5 indicate that the formed sample has a rhombohedral structure with a space group R -3c, the presence of Ni and Ti ion substitution does not cause a change in the structure but there is a change in the lattice parameters and crystal size. Vector Network Analyzer (VNA) characterization in the range of 8 – 12 GHz produces the most optimal reflection loss intensity value of -11.8 dB at an optimal frequency of 10.58 GHz at a concentration of x = 0.5 with the ability to absorb microwaves of 93.39%. Thus the material La0.7Sr0.3Mn1-x(Ni,Ti)x/2O3 (x = 0.1; 0.3 and 0.5) can be used as a microwave absorbent material.