10.57647/j.ijnd.2025.1602.12

Magnetic, magnetocaloric and optical properties of nano Gd3Ga5O12 garnet synthesized by citrate sol-gel method

  1. Department of Chemistry, Government Victoria College, Research Center under University of Calicut, Palakkad, India
  2. School of Physics, IISER Thiruvananthapuram, Vithura, Thiruvananthapuram, India
Magnetic, magnetocaloric and optical properties of nano Gd3Ga5O12 garnet synthesized by citrate sol-gel method

Received: 2024-08-16

Revised: 2024-10-25

Accepted: 2024-10-29

Published 2025-04-01

How to Cite

Reshmi, C. P., Ramesh, A. R., Suresh, A., & Jaiswal-Nagar, D. . (2025). Magnetic, magnetocaloric and optical properties of nano Gd3Ga5O12 garnet synthesized by citrate sol-gel method. International Journal of Nano Dimension, 16(2 (April 2025). https://doi.org/10.57647/j.ijnd.2025.1602.12

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Abstract

Gd3Ga5O12 (GGG) nanoparticles with an average size around 50 nm were synthesized via citrate sol-gel method. Rietveld refinement confirmed the formation of a single-phase garnet structure. The optical properties characterized by UV-Vis absorption and photoluminescence spectra, exhibited bands centered at 300 nm and 436 nm, respectively. Magnetic measurements revealed paramagnetic behaviour above 15 K, as evidenced by the modified Curie-Weiss fitting with an effective magnetic moment of 13.86 μB per formula unit (F.U.). Arrott plots confirmed a second-order nature of the magnetic phase transition. Notably, the GGG nanoparticles displayed a significant magnetocaloric effect (MCE), with a maximum magnetic entropy change (-ΔSM) of 14.2 Jkg-1K-1 at 3.5 K under a 5 T field. These findings highlight the potential of GGG nanoparticles as refrigerants for low temperature magnetic refrigeration applications.

Keywords

  • Arrott plot,
  • Effective magnetic moment,
  • Magnetocaloric effect (MCE),
  • Nano GGG,
  • Optical properties,
  • Rietveld refinement

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