The light rare earth Pr/Ce-contained (Tb_0.2Pr_0.8)_1–xCe_xFe_1.93 (0 ≤ x ≤ 1.0) intermetallics were arc melted and magnetoelastic properties were investigated. The compounds of x ≥ 0.40 are found to stabilize at ambient pressure in a single Laves phase with MgCu₂-type C15 structure, which is attributed to the strong Ce 4f bonding. The mixed-valence behavior, with a support of the deviation from the linear Vegard’s law for both lattice parameter a and saturation magnetization M_S, is observed at room temperature. The easy magnetization direction (EMD) was determined by the analysis of XRD on both magnetically aligned samples and the (440) splitting, that is, EMD lies toward <111> axis for x ≤ 0.50 rotating to <110> for x = 0.60, accompanied with the structural distortion from rhombohedral to orthorhombic. The substitution of Ce for Tb/Pr is conductive to the reduction of magnetocrystalline anisotropy, giving rise to an improvement of the low-field magnetostriction. The excellent magnetoelastic properties can be tailored by the Ce introduction, e.g., the spontaneous magnetostriction coefficient λ₁₁₁ as large as 1150 × 10⁻⁶ for x = 0.40, and the low-field induced magnetostriction achieving a high value of λ_a = 180 × 10⁻⁶ at 80 kA/m for x = 0.60. The excellent magnetoelastic properties and the combination in high Pr-content with low cost, suggest promising prospects in applications.

对轻稀土 Pr/Ce 含 (Tb _0.2 Pr _0.8 ) _{1– x} Ce _x Fe _1.93 (0 ≤  x  ≤ 1.0) 金属间化合物进行电弧熔炼并研究磁弹性。发现x ≥ 0.40的化合物 在环境压力下稳定在具有 MgCu ₂型 C15 结构的单一 Laves 相中，这归因于强 Ce 4f 键合。混合价行为，支持晶格参数a和饱和磁化强度M _{S与线性 Vegard 定律的偏差}, 在室温下观察到。易磁化方向 (EMD) 是通过对磁性对齐样品和 (440) 分裂的 XRD 分析确定的，即 EMD 位于x  ≤ 0.50 时的 <111> 轴，旋转到x  = 0.60 时的 <110> 轴，伴随着从菱面体到斜方体的结构变形。用 Ce 代替 Tb/Pr 有助于降低磁晶各向异性，从而改善低场磁致伸缩。优异的磁致弹性特性可以通过引入 Ce 来调整，例如，对于x ，自发磁致伸缩系数λ ₁₁₁高达 1150 × 10 ^-6 = 0.40，并且低场感应磁致伸缩在x  = 0.60 的情况下在 80 kA/m 下实现λ _a  = 180 × 10 ^{-6的高值。}优异的磁弹性和高Pr含量与低成本的结合表明其应用前景广阔。