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<p>In this work, the nature of vortex pinning has been investigated in overdoped NaFe<sub>0.935</sub>Co<sub>0.065</sub>As single crystals. We obtain temperature and field dependences of the critical current density from the magnetic hysteresis loops measured for two field orientations B || <i>ab</i> and B || <i>c</i>. The obtained magnetic anisotropy is about <i>γ</i> ≈ 10 near <i>T</i><sub>c</sub> and drops to about <i>γ</i> ≈ 2 at temperatures below 12&#xa0;K. Using a Dew-Hughes model, we calculate the normalized pinning force and discuss the pinning nature in NaFe<sub>0.935</sub>Co<sub>0.065</sub>As.</p>

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Critical Current Anisotropy and Vortex Pinning in NaFe0.935Co0.065As Single Crystals

  • 期刊论文

  • 发表日期：

    2025年11月3日

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  • A. Yu. Levakhova,
  • V. A. Vlasenko,
  • S. Yu. Gavrilkin,
  • A. Yu. Tsvetkov,
  • S. A. Kuzmichev,
  • A. V. Muratov,
  • T. E. Kuzmicheva,
  • A. I. Shilov,
  • E. O. Rakhmanov,
  • I. V. Morozov

摘要

In this work, the nature of vortex pinning has been investigated in overdoped NaFe0.935Co0.065As single crystals. We obtain temperature and field dependences of the critical current density from the magnetic hysteresis loops measured for two field orientations B || ab and B || c. The obtained magnetic anisotropy is about γ ≈ 10 near Tc and drops to about γ ≈ 2 at temperatures below 12 K. Using a Dew-Hughes model, we calculate the normalized pinning force and discuss the pinning nature in NaFe0.935Co0.065As.