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Effect of crystal field on the critical exponent of the magnetocaloric property of the mixed spin (7/2, 3/2) Ising system

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Abstract

It has been observed by the Monte Carlo simulation that the magnetic entropy change ΔS of a mixed spin system (7/2, 3/2) follows simple power law relation with the applied magnetic field as \({H}^{n}\). Near the phase transition temperature, the critical exponent n follows the value which is suggested by the mean field approximation. Due to the increment of the crystal field coefficient D, the value of n is deviated from the mean field value and it rises toward 1. Numerical result for D \(\approx\) 4 J shows that the exponent n \(\approx\) 1 for this antiferromagnetically coupled system. The enhancement of the probability of the occurrences of parallel spin combination with the rise of the value of D is responsible for the increment of n.

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Acknowledgements

Author wants to thank Putul Malla Chowdhury for her constant support and valuable suggestions to develop the discussion part of this work.

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  1. Department of Physics, Kanthal Beria Harihar High School, P.O-Sankarpur, South 24-parganas, Baruipur, West Bengal, 743610, India

    Manotosh Chakravorty

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Correspondence to Manotosh Chakravorty.

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Chakravorty, M. Effect of crystal field on the critical exponent of the magnetocaloric property of the mixed spin (7/2, 3/2) Ising system. Indian J Phys 96, 3541–3546 (2022). https://doi.org/10.1007/s12648-022-02310-6

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