The Distorted Octahedral and Magnetocrystalline Anisotropy of FeMnO₃ by Stoner-Wohlfarth Model

Abstract:

Among magnetic materials, ferrites have significant attention due to their potential application, such as magnetic recording, sensors, radar-absorbent materials, catalysts, and energy-storage devices. One of the ferrites family, FeMnO₃, has been synthesized by solid-state reaction using Fe₂O₃ powder with an excess of 0.02% MnO₂ powder in the stoichiometric composition. The structural and morphological properties have been performed using XRD and SEM at room temperature. The diffraction peaks in the pattern were indexed as FeMnO₃ with a cubic (bixbite, Ia3) crystal structure. It showed no additional peaks due to impurities. The SEM image reveals the grains nucleate in a cube-like shape. Some of the particles also seem to agglomerate into larger particles. The magnetic characterization was carried out using VSM at room temperature. The magnetic hysteresis loop (M-H curves) notices the ferrimagnetic behavior. The results show remnant magnetization (M_r), coercive field (H_c), magnetic moment (µ_B), and anisotropy constant of FeMnO₃ are 0.296 emu/g, 299 Oe, 0.046 emu/mol, and 0.1 when the external field is 70˚-80˚ from the easy axis, respectively.

• Periodical: Materials Science Forum (Volume 1080)
• Pages: 139-145
• DOI: https://doi.org/10.4028/p-p876rw
• Online since: January 2023
• Authors: Asep Ridwan Nugraha*, Ervin Nauval Arrasyid, Dedi Dedi, Agustinus Agung Nugroho
• Keywords: Ferrimagnetic, Ferrites, Hysteresis Curve, Iron Manganite, Magnetocrystalline Anisotropy

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