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Abstract <p>The electron paramagnetic resonance spectra of Mn<sup>2+</sup> and Gd<sup>3+</sup> ions in crystals of the narrow-gap semiconductor Pb<sub>0.996</sub>Cu<sub>0.003</sub>Mn<sub><i>x</i></sub>Gd<sub><i>y</i></sub>S (<i>x</i> <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\( \approx \)</EquationSource> <!--BullPhys2571372Ulanov-m1--> </InlineEquation> 6 × 10<sup>–4</sup>, <i>y</i> <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\( \approx \)</EquationSource> <!--BullPhys2571372Ulanov-m2--> </InlineEquation> 4 × 10<sup>–4</sup>) were discovered to demonstrate an unusually strong dependence of the spin relaxation processes of these ions on temperature and power of <i>X-</i>band microwave radiation acting on the crystal sample in a magnetic field. The observed effect manifests itself as sharp dependences of the line shape parameters of the EPR spectra of Mn<sup>2+</sup> and Gd<sup>3</sup> ions on temperature and microwave power. The results of the experimental study indicate a high efficiency of the exchange interaction between these ions via free charge carriers.</p>

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Electron Paramagnetic Resonance in the Narrow-Gap Semiconductor Pb0.996Cu0.003MnxGdyS: Effects of Interaction between Mn2+ and Gd3+ Ions with the Participation of Free Charge Carriers

  • 期刊论文

  • 发表日期：

    2025年12月9日

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  • V. A. Ulanov,
  • R. R. Zainullin,
  • I. V. Yatsyk,
  • R. F. Likerov

摘要

Abstract

The electron paramagnetic resonance spectra of Mn2+ and Gd3+ ions in crystals of the narrow-gap semiconductor Pb0.996Cu0.003MnxGdyS (x \( \approx \) 6 × 10–4, y \( \approx \) 4 × 10–4) were discovered to demonstrate an unusually strong dependence of the spin relaxation processes of these ions on temperature and power of X-band microwave radiation acting on the crystal sample in a magnetic field. The observed effect manifests itself as sharp dependences of the line shape parameters of the EPR spectra of Mn2+ and Gd3 ions on temperature and microwave power. The results of the experimental study indicate a high efficiency of the exchange interaction between these ions via free charge carriers.