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<p>Growing demands for sustainable and energy-efficient cooling solutions have significantly intensified research on the magnetocaloric effect (MCE). In this context, Co₃V₂O₈ nanoparticles represent promising candidates owing to their structurally robust Cubic lattice and favourable magnetic interactions. Phase purity and structural stability were confirmed by XRD, revealing characteristic reflections of cubic Co₃V₂O₈, while SEM demonstrated uniform nanoscale morphology. Histogram particle size analysis revealed that nearly spherical Co₃V₂O₈ nanoparticles with an average size of 600&#xa0;nm were successfully synthesized via a controlled hydrothermal process. Raman spectroscopy further verified structural integrity through well-defined Co-O and V-O vibrational modes, including asymmetric V-O-Co stretching and symmetric V-O vibrations. These results confirm the stable formation of the cubic lattice at the nanoscale. A significant magnetocaloric response was observed near the Curie-Weiss region, indicating efficient field-induced magnetic entropy change. Notably, the material exhibits a magnetic entropy change of 7.89&#xa0;J kg⁻¹ K⁻¹ together with an enhanced relative cooling power of 85&#xa0;J kg⁻¹ when subjected to a 7 T magnetic field. The ability to tune the magnetocaloric response through straight and easily implementable synthesis procedure underscores the potential of Co₃V₂O₈ nanoparticles for low-temperature magnetic refrigeration and allied functional applications.</p>

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Magnetic and magnetocaloric properties of Co₃V₂O₈ nanoparticles for low-temperature adiabatic cooling

  • 期刊论文

  • 发表日期：

    2026年6月22日

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  • Santhana Vedi,
  • Durairajan Arulmozhi,
  • Mohammed Mujahid Alam,
  • Abdullah G. Al-Sehemi,
  • Thangaraju Dheivasigamani

摘要

Growing demands for sustainable and energy-efficient cooling solutions have significantly intensified research on the magnetocaloric effect (MCE). In this context, Co₃V₂O₈ nanoparticles represent promising candidates owing to their structurally robust Cubic lattice and favourable magnetic interactions. Phase purity and structural stability were confirmed by XRD, revealing characteristic reflections of cubic Co₃V₂O₈, while SEM demonstrated uniform nanoscale morphology. Histogram particle size analysis revealed that nearly spherical Co₃V₂O₈ nanoparticles with an average size of 600 nm were successfully synthesized via a controlled hydrothermal process. Raman spectroscopy further verified structural integrity through well-defined Co-O and V-O vibrational modes, including asymmetric V-O-Co stretching and symmetric V-O vibrations. These results confirm the stable formation of the cubic lattice at the nanoscale. A significant magnetocaloric response was observed near the Curie-Weiss region, indicating efficient field-induced magnetic entropy change. Notably, the material exhibits a magnetic entropy change of 7.89 J kg⁻¹ K⁻¹ together with an enhanced relative cooling power of 85 J kg⁻¹ when subjected to a 7 T magnetic field. The ability to tune the magnetocaloric response through straight and easily implementable synthesis procedure underscores the potential of Co₃V₂O₈ nanoparticles for low-temperature magnetic refrigeration and allied functional applications.