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Observation of spontaneous spin reorientation in Nd1 − x Dy x Fe3(BO3)4 ferroborates with a competitive R-Fe exchange

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Abstract

The magnetic, magnetoelectric, and magnetoelastic properties of DyFe3(BO3)4 single crystals and the Nd0.75Dy0.25Fe3(BO3)4 substituted compound with the competitive Nd-Fe and Dy-Fe exchange interactions have been investigated in magnetic fields up to 210 kOe. It has been shown that the antiferromagnetic state in Nd0.75Dy0.25Fe3(BO3)4 below the Néel temperature is easy-plane and a spontaneous spin-reorientation transition to a uniaxial state occurs near 25 K. Anomalies are observed in various physical characteristics in a spin-flop transition induced by the magnetic field along the trigonal axis. The H-T phase diagrams are constructed; they are in good agreement with a simple model taking into account the anisotropy of the exchange splitting and g factors of the ground doublets of the Dy3+ and Nd3+ ions. The features of the magnetoelectric effect in various magnetic phases have been studied. Spontaneous electric polarization has been revealed in the region of the existence of an easy-plane antiferromagnetic state in the substituted compound. A qualitative theoretical justification of the possibility of the appearance of the spontaneous spin-reorientation transition in the Nd0.75Dy0.25Fe3(BO3)4 substituted compound is given.

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Authors and Affiliations

  1. Moscow State University, Moscow, 119992, Russia

    Yu. F. Popov, A. M. Kadomtseva & G. P. Vorob’ev

  2. Prokhorov General Physics Institute, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russia

    A. A. Mukhin, V. Yu. Ivanov, A. M. Kuz’menko & A. S. Prokhorov

  3. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660038, Russia

    L. N. Bezmaternykh & V. L. Temerov

Authors
  1. Yu. F. Popov
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  2. A. M. Kadomtseva
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  3. G. P. Vorob’ev
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  4. A. A. Mukhin
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  5. V. Yu. Ivanov
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  6. A. M. Kuz’menko
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  7. A. S. Prokhorov
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  8. L. N. Bezmaternykh
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  9. V. L. Temerov
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Corresponding author

Correspondence to A. M. Kadomtseva.

Additional information

Original Russian Text © Yu.F. Popov, A.M. Kadomtseva, G.P. Vorob’ev, A.A. Mukhin, V.Yu. Ivanov, A.M. Kuz’menko, A.S. Prokhorov, L.N. Bezmaternykh, V.L. Temerov, 2009, published in Pis’ma v Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2009, Vol. 89, No. 7, pp. 405–411.

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Popov, Y.F., Kadomtseva, A.M., Vorob’ev, G.P. et al. Observation of spontaneous spin reorientation in Nd1 − x Dy x Fe3(BO3)4 ferroborates with a competitive R-Fe exchange. Jetp Lett. 89, 345–351 (2009). https://doi.org/10.1134/S002136400907008X

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  • DOI: https://doi.org/10.1134/S002136400907008X

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