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<p>A combination of experimental methods has been applied to study the structure and properties of new magnetically ordered (Fe,Co)BO<sub>3</sub> single crystals synthesized from a high-temperature melt solution. It has been established that the (Fe,Co)BO<sub>3</sub> crystals are isostructural to FeBO<sub>3</sub> iron borate. It has been shown that even a low cobalt concentration significantly changes the magnetic properties of the crystals compared to FeBO<sub>3</sub>. The most pronounced feature of the (Fe,Co)BO<sub>3</sub> crystals is the appearance of field and temperature hysteresis of the magnetization, as well as an exchange bias of the hysteresis loop. A mechanism for the formation of these anomalous properties is proposed, associated with the formation of superparamagnetic nanoclusters containing cobalt ions in the structure of the (Fe,Co)BO<sub>3</sub> single crystals.</p>

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Magnetic Properties and the Effect of Exchange Bias of the Hysteresis Loop in Iron Borate Single Crystals Doped with Cobalt Ions

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月1日

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  • N. I. Snegirev,
  • A. V. Bogach,
  • S. S. Starchikov,
  • E. S. Smirnova,
  • O. A. Alekseeva,
  • I. S. Lyubutin

摘要

A combination of experimental methods has been applied to study the structure and properties of new magnetically ordered (Fe,Co)BO3 single crystals synthesized from a high-temperature melt solution. It has been established that the (Fe,Co)BO3 crystals are isostructural to FeBO3 iron borate. It has been shown that even a low cobalt concentration significantly changes the magnetic properties of the crystals compared to FeBO3. The most pronounced feature of the (Fe,Co)BO3 crystals is the appearance of field and temperature hysteresis of the magnetization, as well as an exchange bias of the hysteresis loop. A mechanism for the formation of these anomalous properties is proposed, associated with the formation of superparamagnetic nanoclusters containing cobalt ions in the structure of the (Fe,Co)BO3 single crystals.