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<p>The PrCo<sub>2.5</sub>FeAl<sub>1.5</sub> quaternary alloy was synthesized from stoichiometric amounts of aluminum (Al), iron (Fe), cobalt (Co), and praseodymium (Pr) using vacuum arc furnace melting followed by high-temperature annealing. Powder X-ray diffraction coupled with Rietveld refinement was used to determine its crystal structure. The results reveal that PrCo<sub>2.5</sub>FeAl<sub>1.5</sub> is isostructural with NdCo<sub>3.5</sub>Al<sub>1.5</sub> (CaCu<sub>5</sub>-type structure, space group <i>P</i>6/<i>mmm</i> (No. 191)), with lattice parameters of <i>a</i> = 5.1548(5) Å and <i>c</i> = 4.0783(4) Å. The magnetic properties of PrCo<sub>2.5</sub>FeAl<sub>1.5</sub> were measured using a Physical Property Measurement System (PPMS). The temperature-dependent magnetic susceptibility data measured under a 50 Oe magnetic field indicate ferrimagnetic behavior below the Curie temperature <i>T</i><sub>c</sub> = 366.7&#xa0;K. In addition, isothermal magnetization curves and magnetic hysteresis loops indicate that the saturation magnetization <i>M</i><sub>S</sub>, remnant magnetization <i>M</i><sub><i>r</i></sub>, and coercivity <i>H</i><sub>c</sub> at 2&#xa0;K are 5.76 <i>μ</i><sub>B</sub>/f.u., 2.98 <i>μ</i><sub>B</sub>/f.u. and 0.19&#xa0;T, respectively. All three magnetic parameters decrease with increasing temperature. Furthermore, PrCo<sub>2.5</sub>FeAl<sub>1.5</sub> exhibits low coercivity and a hysteresis loss <i>W</i><sub>h</sub> of 91.79&#xa0;J/m<sup>3</sup> at room temperature.</p>

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Synthesis, crystal structure, and magnetic properties of quaternary PrCo2.5FeAl1.5 alloy

  • 期刊论文

  • 发表日期：

    2026年7月28日

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  • Liuqing Liang,
  • Bing He,
  • Huiting Ouyang,
  • Degui Li,
  • Weijun Li

摘要

The PrCo2.5FeAl1.5 quaternary alloy was synthesized from stoichiometric amounts of aluminum (Al), iron (Fe), cobalt (Co), and praseodymium (Pr) using vacuum arc furnace melting followed by high-temperature annealing. Powder X-ray diffraction coupled with Rietveld refinement was used to determine its crystal structure. The results reveal that PrCo2.5FeAl1.5 is isostructural with NdCo3.5Al1.5 (CaCu5-type structure, space group P6/mmm (No. 191)), with lattice parameters of a = 5.1548(5) Å and c = 4.0783(4) Å. The magnetic properties of PrCo2.5FeAl1.5 were measured using a Physical Property Measurement System (PPMS). The temperature-dependent magnetic susceptibility data measured under a 50 Oe magnetic field indicate ferrimagnetic behavior below the Curie temperature Tc = 366.7 K. In addition, isothermal magnetization curves and magnetic hysteresis loops indicate that the saturation magnetization MS, remnant magnetization Mr, and coercivity Hc at 2 K are 5.76 μB/f.u., 2.98 μB/f.u. and 0.19 T, respectively. All three magnetic parameters decrease with increasing temperature. Furthermore, PrCo2.5FeAl1.5 exhibits low coercivity and a hysteresis loss Wh of 91.79 J/m3 at room temperature.