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SINTESIS DAN KARAKTERISASI STRUKTUR PEROVSKITE BERBASIS LaMnO3 DENGAN SUBSTITUSI MULTI-KOMPONEN BERDASARKAN VARIASI KOMPOSISI

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Penilaian

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This study aims to synthesize and characterize the crystal structure of LaMnO3-based perovskite materials with multi-component substitution to evaluate the effect of compositional variation on phase formation, lattice parameters, crystallite size, and lattice strain. The research was conducted at PRMM, BJ Habibie Science and Technology Area (KST), BRIN, Serpong, from late 2024 to early 2025 as part of a final project by a Physics student at Universitas Sriwijaya. Two composition variants, La0.7Sr0.3(Fe0.33Cu0.33Mn0.33)O3 and La0.7Sr0.3(Fe0.25Cu0.25Mn0.25Ni0.25)O3, were synthesized using the mechanical alloying method. Characterization was performed using X-Ray Diffraction (XRD), with diffraction patterns analyzed through Match! software, GSAS via Rietveld refinement, Williamson-Hall method, and VESTA for crystal structure visualization. The results showed that the Ni-free composition formed a single LaMnO3 with a cubic structure (Pm-3m), while the Ni-containing composition resulted in secondary phases, Cu6.8Fe1.2La6.4O20Sr1.6 (tetragonal, P4/mbm) and La2NiO4.24 (orthorhombic, Fmmm). The crystallite size of the Ni-containing material was smaller (53.33 nm) with higher lattice strain (0.002375), indicating greater structural distortion. Crystal structure visualization revealed atom distribution patterns consistent with these findings. Keywords: Perovskite, LaMnO3, Multi-Component Substitution, Mechanical Alloying, X-Ray Diffraction (XRD), Rietveld Refinement, Williamson-Hall, VESTA.

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Availability

Inventory Code	Barcode	Call Number	Location	Status
2507003119	T173404	T1734042025	Central Library (Reference)	Available but not for loan - Not for Loan

Detail Information

Series Title

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Call Number

T1734042025

Publisher

: Prodi Ilmu Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Sriwijaya., 2025

Collation

vii, 99 hlm.: Ilus., tab.; 29 cm

Language

Indonesia

ISBN/ISSN

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Classification

530.07

Content Type

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Media Type

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Carrier Type

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Edition

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Subject(s)

Fisika

Specific Detail Info

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Statement of Responsibility

EM

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