Abstract Nanocrystalline Fe73.5Cu1Nb3Si13.5B9 ribbon samples possess excellent soft magnetic properties. Three forms of annealing treatment were performed on amorphous Fe-Cu-Nb-Si-B ribbon samples. The microstructure of the ribbon samples is studied using synchrotron radiation XRD. It is seen that upon annealing, a microstructure of nanocrystalline phase embedded in a residual amorphous matrix is achieved. The application of tensile stress (i) at the annealing temperature till cooling down to room temperature and (ii) from room temperature throughout the annealing process till cooling down to room temperature both show a clear difference in the XRD peaks in the directions parallel and perpendicular to the ribbon directions indicative of an induced structural anisotropy. The transition from the amorphous phase to the nanocrystalline phase was also confirmed by the GMI and transverse field anisotropy measurements. The application of tensile stress at the annealing temperature induces an anisotropy similar to the conventional stress annealing process, with about 5% less strain. This could be a method of reducing the brittle fracture problem of nanocrystalline ribbon samples.

中文翻译：

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退火温度下施加拉应力对 Fe-Cu-Nb-Si-B 合金 GMI 和诱导各向异性的影响

摘要 纳米晶Fe73.5Cu1Nb3Si13.5B9 薄带样品具有优良的软磁性能。对非晶 Fe-Cu-Nb-Si-B 薄带样品进行了三种形式的退火处理。使用同步辐射 XRD 研究带状样品的微观结构。可以看出，在退火时，获得了嵌入残余非晶基体中的纳米晶相的微观结构。拉伸应力的施加（i）在退火温度直到冷却到室温和（ii）在整个退火过程中从室温到冷却到室温都在平行和垂直方向的 XRD 峰中显示出明显的差异到表示诱导结构各向异性的带方向。GMI 和横向场各向异性测量也证实了从非晶相到纳米晶相的转变。在退火温度下施加拉伸应力会引起类似于传统应力退火工艺的各向异性，应变减少约 5%。这可能是一种减少纳米晶带样品脆性断裂问题的方法。