Abstract We report the magneto-structural and magnetocaloric properties study of Tb purified by distillation and further processed by severe plastic deformation (SPD). Both parent and the SPD-processed Tb contain nanosized structural elements and have a very pronounced (00l) texture. We observe an improved magnetocaloric effect (MCE) in the distilled nanocrystalline Tb while novel properties emerge in the sample after severe plastic deformation. The latter demonstrates zero thermal expansion over a wide temperature range while its MCE vanishes. We show that the absolutely new physical properties in Tb result from the structural transformation and modification of magnetic interactions.

中文翻译：

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蒸馏铽的增强磁热效应和严重塑性变形后新特性的出现

摘要 我们报告了通过蒸馏纯化并通过严重塑性变形 (SPD) 进一步加工的 Tb 的磁结构和磁热特性研究。母体和 SPD 处理的 Tb 都包含纳米尺寸的结构元素，并具有非常明显的 (00l) 纹理。我们在蒸馏的纳米晶 Tb 中观察到改进的磁热效应 (MCE)，而在严重塑性变形后样品中出现了新的特性。后者在很宽的温度范围内表现出零热膨胀，而其 MCE 消失。我们表明，Tb 中绝对新的物理特性是磁相互作用的结构转变和修饰的结果。