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<p>With the aim of obtaining a material with interesting magnetocaloric and optical properties. We prepared by sol–gel method The La<sub>0.57</sub>Nd<sub>0.1</sub>Sr<sub>0.18</sub>Ag<sub>0.15</sub>CoO<sub>3</sub> (LNSACO) compound. This prepared material has a rhombohedral crystal structure with R-3c space group. According to the conventional ZFC and FC processes, magnetization curves as a function of temperature clearly exhibit a paramagnetic/ferromagnetic transition at Tc = 225&#xa0;K. The observed irreversibility between FC and ZFC modes at the irreversible temperature Ti = 210&#xa0;K is assigned to the existence of magnetic anisotropy. By adjusting the hysteresis loop using an empirical formula, different magnetic parameters such as the coercive field (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:{H}_{C}\)</EquationSource> </InlineEquation>), the remanent magnetization <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\:{(M}_{r}),\:\)</EquationSource> </InlineEquation>the saturation magnetization (<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\:{M}_{s}^{FM}\)</EquationSource> </InlineEquation>) and the squareness ratio (<InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\:{S}_{qr}\)</EquationSource> </InlineEquation>) are selected. The existence of double coercive field indicates the presence of the exchange bias effect, proving the material’s suitability for a variety of technological applications including spintronic and magnetic head devices. The optoelectronic uses of cobaltite material have been highlighted by a more in-depth study of the refractive index, penetration depth, extinction coefficients. The bandgap values ​​obtained make them good promising candidates for the absorption of visible light.</p>

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Enhanced Magnetic and Optical Properties of La₀.₅₇Nd₀.₁Sr₀.₁₈Ag₀.₁₅CoO₃ Cobaltite: A Theoretical Study for Optoelectronic Applications

  • 期刊论文

  • 发表日期：

    2026年2月12日

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  • F. Issaoui,
  • M. Jeddi,
  • H. Issaoui,
  • T. Ben Slimen,
  • J. Othmani,
  • E. Dhahri,
  • K. Khirouni,
  • Benilde F.O. Costa,
  • Bernardo A. Nogueira,
  • Rui Fausto

摘要

With the aim of obtaining a material with interesting magnetocaloric and optical properties. We prepared by sol–gel method The La0.57Nd0.1Sr0.18Ag0.15CoO3 (LNSACO) compound. This prepared material has a rhombohedral crystal structure with R-3c space group. According to the conventional ZFC and FC processes, magnetization curves as a function of temperature clearly exhibit a paramagnetic/ferromagnetic transition at Tc = 225 K. The observed irreversibility between FC and ZFC modes at the irreversible temperature Ti = 210 K is assigned to the existence of magnetic anisotropy. By adjusting the hysteresis loop using an empirical formula, different magnetic parameters such as the coercive field ( \(\:{H}_{C}\) ), the remanent magnetization \(\:{(M}_{r}),\:\) the saturation magnetization ( \(\:{M}_{s}^{FM}\) ) and the squareness ratio ( \(\:{S}_{qr}\) ) are selected. The existence of double coercive field indicates the presence of the exchange bias effect, proving the material’s suitability for a variety of technological applications including spintronic and magnetic head devices. The optoelectronic uses of cobaltite material have been highlighted by a more in-depth study of the refractive index, penetration depth, extinction coefficients. The bandgap values ​​obtained make them good promising candidates for the absorption of visible light.