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<p>Tuning magnetic, optical and structural properties with a compressive stress (strain) is a key goal for developing next-generation low-power memory and spintronic devices. In this study, we explore strain-mediated magnetoelectric coupling in α-Fe<sub>2</sub>O<sub>3</sub>–BaTiO<sub>3</sub> (BTO) particulate composites synthesized via a co-precipitation method. Structural and morphological analyses confirm phase-pure composites with strong interfacial contact. Saturation magnetization of the composite (<i>x</i>)BTO + (1–<i>x</i>)Fe<sub>2</sub>O<sub>3</sub> decreases with an increase in the BTO fraction (<i>x</i>) from 0 to 0.5. Raman spectroscopy shows shifts in vibrational modes due to compressive stress in BTO, while UV–Visible spectroscopy indicates a reduction in bandgap of BTO with an increase in Fe<sub>2</sub>O<sub>3</sub> content. These findings demonstrate compressive strain that exist at the interface is key to modify the physical properties of the α-Fe<sub>2</sub>O<sub>3</sub>–BaTiO<sub>3</sub> (BTO) particulate composites. </p>

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The Structural, Magnetic and Optical Properties of α-Fe2O3-BaTiO3 Particulate Composites

  • 期刊论文

  • 发表日期：

    2026年3月28日

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  • Prakash Bongurala,
  • P. Syam Prasad,
  • S. Narayana Jammalamadaka

摘要

Tuning magnetic, optical and structural properties with a compressive stress (strain) is a key goal for developing next-generation low-power memory and spintronic devices. In this study, we explore strain-mediated magnetoelectric coupling in α-Fe2O3–BaTiO3 (BTO) particulate composites synthesized via a co-precipitation method. Structural and morphological analyses confirm phase-pure composites with strong interfacial contact. Saturation magnetization of the composite (x)BTO + (1–x)Fe2O3 decreases with an increase in the BTO fraction (x) from 0 to 0.5. Raman spectroscopy shows shifts in vibrational modes due to compressive stress in BTO, while UV–Visible spectroscopy indicates a reduction in bandgap of BTO with an increase in Fe2O3 content. These findings demonstrate compressive strain that exist at the interface is key to modify the physical properties of the α-Fe2O3–BaTiO3 (BTO) particulate composites.