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Mean-field parameters of some PrTbAl compounds found via searching for the best magnetic heat capacity fitting

Journal of Physics: Conference Series, ISSN: 1742-6596, Vol: 2090, Issue: 1
2021
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Conference Paper Description

Simulations of the magnetic heat capacity of some (Pr,Tb)Al2 compounds were performed using the mean-field approach. The developed routine aims to optimize the set of mean-field parameters. The proposed algorithm calculates the sum of squared differences between the experimental points and the simulated curve and then changes the parameters in order to minimize this sum. This searching leads to consistent values that can reproduce the experimental data. The parameters found in this work reproduced the heat capacities curves of the PrxTb(1-x)Al2 compounds, x=0.25, x=0.50 and x=0.75, with good agreement. The physical limitations of the mean-field approach do not preclude analysing the results. These parameters are important because they can help to understand and calculate the magnetocaloric effect these materials can present.

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