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Pressure-induced magnetic transition in Nd2Fe14B based on two-sublattice model

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Abstract

To analyze the magnetic properties of Nd2Fe14B compound under high pressure, an improved two-sublattice molecular field model coupled with equivalent stress field was applied to study the effect of pressure on magnetization, magnetostriction coefficient, susceptibility and Curie temperature. The calculation results show that the pressure has a stronger effect on the magnetization of Fe sublattice compared to that of Nd sublattice at varied temperatures when the external magnetic field is parallel to the alignment direction. Saturated magnetization, initial susceptibility and magnetic moment of Nd2Fe14B compound are found to decrease gradually with pressure increasing, and the Curie temperature of Nd2Fe14B decreases to about 298 K under an applied pressure of 1.15 GPa. The results suggest that the pressure-induced magnetic phase transition of Nd2Fe14B occurs under 1.15 GPa at room temperature.

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Acknowledgements

This study was financially supported by the National Natural Science Foundation of China (No. 11072036).

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Correspondence to Shuo Xu.

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Lu, F., Xu, S. & Wang, Lh. Pressure-induced magnetic transition in Nd2Fe14B based on two-sublattice model. Rare Met. 41, 232–239 (2022). https://doi.org/10.1007/s12598-018-1192-x

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  • DOI: https://doi.org/10.1007/s12598-018-1192-x

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