低温X射线衍射研究Fe1 + dTe体系两步结构相变的演化
Evolution of two-step structural phase transition in Fe1+dTe detected by low-temperature x-ray diffraction
摘要：
通过系统的X射线衍射测量，阐明了Fe_（1.13）Te的低温晶体结构，该结构表现出反常的两步磁转变。结果表明，与两步磁转变相对应的是四方-正交-单斜两步结构相变。在5 K的详细分析表明，在主要的单斜晶格，这可以解释在Fe 1.13 Te的反铁磁转变温度的较低的位移（抑制），并建议在畴界超导的可能性内的次要正交区域的共存。
英文摘要：
The low-temperature crystal structure of Fe1.13Te, which exhibits an anomalous two-step magnetic transition, was clarified by the systematic x-ray diffraction measurements. It was found that two-step structural phase transition, tetragonal-orthorhombic-monoclinic, occurred correspondingly to the two-step magnetic transition. The detailed analysis of the profile at 5 K indicated the coexistence of the minor orthorhombic area inside the major monoclinic lattice, which could explain the lower-shift (suppression) of the antiferromagnetic transition temperature in Fe1.13Te and suggest a possibility of superconductivity at the domain boundary.
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