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Strengthening the Intersublattice Exchange Interaction in R(Fe,Ti)\({}_{12}\)N (R = Ho and Er) Nitrides

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Moscow University Physics Bulletin Aims and scope

Abstract

The field dependences of the magnetization of nitrogen-containing compounds R(Fe,Ti)\({}_{12}\)N (R = Ho and Er) are analyzed. It was found that the initial HoFe\({}_{11}\)Ti sample at \(T=4.2\) K exhibits the eaxy-axis anisotropy; however, as a result of nitriding, the anisotropy type changes to the easy cone of magnetization. As in the original samples of HoFe\({}_{11}\)Ti and ErFe\({}_{11}\)Ti, in HoFe\({}_{11}\)TiN and ErFe\({}_{11}\)TiN nitrides the cascade of spin-reorientation phase transitions is observed which is induced by external magnetic field. In the framework of the molecular field theory, the effect of nitriding on the interlattice exchange interactions is estimated. It is established that the molecular field that acts from the iron sublattice on rare-earth ions (holmium and erbium) is enhanced. The effect of nitriding and hydrogenation on the intersublattice exchange is compared.

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ACKNOWLEDGMENTS

The author thanks I. A. Pelevin and J. Lou for the high-field data on magnetization.

Funding

This work was supported by the Russian Science Foundation (project no. 18-13-00135).

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Authors and Affiliations

  1. Department of Physics,Moscow State University, 119991, Moscow, Russia

    I. S. Tereshina

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  1. I. S. Tereshina
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Correspondence to I. S. Tereshina.

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Translated by E. Oborin

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Tereshina, I.S. Strengthening the Intersublattice Exchange Interaction in R(Fe,Ti)\({}_{12}\)N (R = Ho and Er) Nitrides. Moscow Univ. Phys. 75, 237–241 (2020). https://doi.org/10.3103/S0027134920030169

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