Superconducting properties of the Fe(Se,Te) system are directly related to its microstructure. However, in the framework of a not well assessed phase diagram, a large spread of chemico-physical and functional properties is reported for compounds characterized by similar overall chemical compositions. This is in particular observed in materials produced by melting routes, where chemical inhomogeneities and multiple phases are commonly obtained. Both composition and morphology of these inhomogeneities seem to play a role in the behaviour of the superconducting phases, pointing out the need to assess the dependence of phase composition and therefore of the material performance on the sample thermal history. In this work, the effect of different post-synthesis annealing treatments is studied. A melting route has been adopted to synthesize polycrystalline samples, subsequently subjected to thermal treatments at different temperatures. Morphology and microstructure were charact...

中文翻译：

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熔融过程中的Fe（Se，Te）：热处理对微结构和超导性能的影响

Fe（Se，Te）系统的超导性能与其微观结构直接相关。然而，在一个未充分评估的相图的框架内，据报道，以总体化学成分相似的化合物为代表，其化学物理和功能特性分布广泛。这尤其是在通过熔融路线生产的材料中观察到的，其中通常获得化学不均匀性和多相。这些不均匀性的组成和形态似乎都在超导相的行为中起作用，指出需要评估相组成的依赖性，因此需要评估材料性能对样品热历史的依赖性。在这项工作中，研究了不同的合成后退火处理的效果。已采用熔融路线合成多晶样品，随后在不同温度下进行热处理。形态和微观结构具有特征...