Effect of Sm doping and annealing on magnetic and structural properties of sputter deposited SnO<sub>2</sub> thin films

Lakshmi, R. Bakiya; Juliet, A. Vimala; Sundararaj, Anuraj; Abhinav, E. Meher; Gopalakrishnan, C.

doi:10.1088/2053-1591/aaba0b

Cited by 5 publications

(1 citation statement)

References 28 publications

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“…Later, rare earth oxides (REO) materials have gone mainstream in magnetic, catalytic, optical, sensor, and cryogenic applications over the last few decades. [14][15][16][17][18][19][20][21][22] REO's are of high technical importance in the refrigeration domain because of their ability to experience isothermal entropy change when external stimuli such as an electric force, magnetic field, stress, or pressure are applied. [23][24][25] By switching one control parameter to another, several driving fields may produce greater thermal changes with a smaller magnetic field across a broad range of operating temperatures and remove hysteresis.…”

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confidence: 99%

Enhanced Cryogenic Magnetocaloric Performance in Te Doped Dy₂O₃

Abhinav¹,

Jaison²,

Baskaran³

et al. 2022

ECS J. Solid State Sci. Technol.

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The work aims to investigate the magnetocaloric effect (an eco-friendly and energy-efficient cooling technique) of Te doped nanosized dysprosia, which could be used as the best alternative for conventional chlorofluorocarbons-based refrigeration systems. In this present work, Te doped nano-sized dysprosia (TNSD) is synthesized using the sol-gel technique. The particle characteristics and magnetocaloric properties of TNSD were investigated. The change in lattice parameters of NSD concerning doping of TNSD is analyzed by using Rietveld refinement. The synthesized nanoparticles were observed to be spherical and monophasic with a Ia-3 structure. At low temperature, the sample exhibited a non-saturated magnetic behavior due to the co-existence of ferromagnetic and antiferromagnetic phases, while at high temperature it exhibited a paramagnetic nature. The maximum entropy change of TNSD at a magnetic field of 50 kOe was found to be 30.6 JKg-1K-1. The significant magnetic transitions at low temperature and large magnetic entropy change make TNSD suitable material as a refrigerant for cryo-cooling systems.

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