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<p>The magnetic properties of (Sm<sub>1-x</sub>Prₓ)Co₅ melt-spun ribbons with varying Pr content (<i>x</i> = 0–1.0) were investigated. Experimental results show that the best magnetic properties for SmCo₅ and PrCo₅ ribbons with a wheel speed of 40&#xa0;m/s are achieved when annealed at 500&#xa0;°C for 30&#xa0;min. The melt-spinning process induces texture orientation, promoting the orderly alignment of grains. Both SmCo₅ and PrCo₅ exhibit a hexagonal P6/mmm crystal structure, allowing Pr to incorporate into the SmCo₅ primary phase and form a continuous solid solution (Sm, Pr)Co₅. As the Pr content increases, the Curie temperature (<i>T</i><sub>c</sub>) of (Sm<sub>1-x</sub>Prₓ)Co₅ ribbons decreases from 948 to 880&#xa0;K. Coercivity (H<sub>cj</sub>), remanence ratio (<i>M</i><sub>r</sub>/<i>M</i><sub>s</sub>), and maximum energy product [(<i>BH</i>)<sub>max</sub>] all decrease with increasing Pr content, while saturation magnetization (<i>M</i><sub>s</sub>) increases. This contradictory behavior indicates that the enhanced magnetization due to Pr substitution is offset by the reduced magnetic crystalline anisotropy in the (Sm<sub>1-x</sub>Prₓ)Co₅ ribbons. Overall, a relatively balanced magnetic performance can be obtained when the content of Pr substitution is less than 0.3.</p>

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Effect of Pr substitution on the phase structure and magnetic properties of (Sm1-xPrₓ)Co₅ (x = 0–1) melt-spun ribbons

  • 期刊论文

  • 发表日期：

    2025年6月26日

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  • Zhen Tang,
  • Chengfu Xu,
  • Senyang Fu,
  • Lei Ma,
  • Rongjin Liu,
  • Yongquan Yang,
  • Zhengfei Gu,
  • Yusong Du,
  • Guanghui Rao

摘要

The magnetic properties of (Sm1-xPrₓ)Co₅ melt-spun ribbons with varying Pr content (x = 0–1.0) were investigated. Experimental results show that the best magnetic properties for SmCo₅ and PrCo₅ ribbons with a wheel speed of 40 m/s are achieved when annealed at 500 °C for 30 min. The melt-spinning process induces texture orientation, promoting the orderly alignment of grains. Both SmCo₅ and PrCo₅ exhibit a hexagonal P6/mmm crystal structure, allowing Pr to incorporate into the SmCo₅ primary phase and form a continuous solid solution (Sm, Pr)Co₅. As the Pr content increases, the Curie temperature (Tc) of (Sm1-xPrₓ)Co₅ ribbons decreases from 948 to 880 K. Coercivity (Hcj), remanence ratio (Mr/Ms), and maximum energy product [(BH)max] all decrease with increasing Pr content, while saturation magnetization (Ms) increases. This contradictory behavior indicates that the enhanced magnetization due to Pr substitution is offset by the reduced magnetic crystalline anisotropy in the (Sm1-xPrₓ)Co₅ ribbons. Overall, a relatively balanced magnetic performance can be obtained when the content of Pr substitution is less than 0.3.