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Pengaruh Konsentrasi Dysprosium Terhadap Struktur dan Sifat Magnetik Stronsium Ferit Sebagai Penyerap Gelombang Mikro

PAMUNGKAS, Alivia septa (2023) Pengaruh Konsentrasi Dysprosium Terhadap Struktur dan Sifat Magnetik Stronsium Ferit Sebagai Penyerap Gelombang Mikro. Skripsi thesis, Universitas Jenderal Soedirman.

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Abstract

The presence of electromagnetic interference (EMI) disrupts the performance of devices that use microwaves, such as medical devices, wireless devices, radar systems and communication satellites. The problem of electromagnetic interference (EMI) can be overcome with materials that can absorb waves of different frequencies. This study aims to produce a strontium ferrite-based microwave absorbent material doped with a rare earth metal in the form of dysprosium (Dy) with various concentrations of 0, 5, 10, and 15 mol% using the solid state reaction method. The addition of Dysprosium can affect the structure and size of crystals, magnetic properties, and absorption of microwaves of strontium ferrite materials. Six crystalline phases were formed, namely Iron Oxide (Fe2O3) with a rhombohedral crystal structure, Strontium dodecaferrate (III) (Sr2Fe24O38) with a hexagonal crystal structure, Magnetite-h (Fe12O16) with an orthorhombic crystal structure, Dy4Fe4O12 with an orthorhombic crystal structure, Fe5Dy with a hexagonal crystal structure, and SrFeO2 with a tetragonal crystal structure. The average size of the crystals ranges from 66.025 – 82.25 nm. The VSM characterization results show that the DySrFe material is softmagnetic. The magnetic susceptibility of sample DSF0 is classified as a superparamagnetic material with order 10-6 and DSF5, DSF10, and DSF15 are classified as paramagnetic materials with order 10-5. The results of the VNA characterization showed that the absorption power was greatest in the DSF15 sample with a reflection loss value of -94.79 dB and an absorption percentage of 100%.

Item Type: Thesis (Skripsi)
Nomor Inventaris: K23082
Uncontrolled Keywords: dysprosium, microwave absorber, solid state reaction, strontium ferrite
Subjects: M > M329 Microwaves
Divisions: Fakultas Matematika dan Ilmu Pengetahuan Alam > S1 Fisika
Depositing User: Mrs. PAMUNGKAS Alivia Septa
Date Deposited: 19 Jun 2023 01:16
Last Modified: 19 Jun 2023 01:16
URI: http://repository.unsoed.ac.id/id/eprint/21674

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