MICROWAVE ABSORBING PROPERTIES OF LaMn1-x NixO3.

Sitti Ahmiatri Saptari; Azwar Manaf; Budhy Kurniawan

doi:10.17146/jsmi.2014.15.4.4335

MICROWAVE ABSORBING PROPERTIES OF LaMn1-x NixO3.

Sitti Ahmiatri Saptari⁽¹⁾, Azwar Manaf⁽²⁾, Budhy Kurniawan⁽³⁾,

(1) Faculty of Science and Technology, State Islamic University, Jakarta Jl. Ir. H. Juanda No. 95, Ciputat 15412
(2) Departement of Physics, University of Indonesia
(3) Departement of Physics, University of Indonesia

Corresponding Author

Abstract

MICROWAVE ABSORBING PROPERTIES OF LaMn_1-xNixO₃. The doped lanthanum manganites have unusual magnetic and transport properties, which makes it possible for this material to be used for microwave absorbing. In this study, LaMn_1-xNixO₃ (x = 0, 0.02, 0.04, and 0.06) were prepared by solid state reaction method as microwave absorption material. The crystal structure and magnetic properties were characterized byX-Ray Diffractometer (XRD) and Vibrating SampleMagnetometer (VSM), respectively. Refinement results of X-Ray diffraction pattern using High Score Plus Software showed that the samples with various x = 0 to x = 0.04 had a single phase with monoclinic crystal structure, while the sample with x = 0.06 had two phases with monoclinic and hexagonal structures. Hysteresis loops showed that the LaMn_1-xNixO₃ (x = 0, 0.02, 0.04, and 0.06) samples are soft magnetic materials. Microwave absorption properties were investigated in the frequency range of 8-12 GHz using Vector Network Analyzer (VNA). An optimal reflection loss of -8.85 dB is reached at 11.58 GHz for x = 0.04 with sampel thickness of 2 mm.