Evidence of magnetic broadening in Mössbauer spectra of superconducting FeTe0.8S0.2
Evidence of magnetic broadening in Mössbauer spectra of superconducting FeTe0.8S0.2
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超导 FeTe0.8S0.2 穆斯堡尔谱中磁展宽的证据
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
M. Karppinen
中科院分区：
文献类型：
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作者：
A. Sklyarova;G. Tewari;J. Lindén;H. Yamauchi;M. Karppinen
用穆斯堡尔谱学研究了FeTe_（0.8）S_（0.2）超导体的磁性。从5.7 K到300 K的温度范围内记录的低速穆斯堡尔谱显示出在低于77 K的温度下增宽的顺磁双峰。这种展宽可以用超精细磁场分布的出现来解释，这种分布是由于样品的一部分的磁有序化引起的。磁有序分数开始减少，在温度低于20 K，表明可能的竞争与onseting的natural状态。
Magnetic properties of the FeTe0.8S0.2 superconductor were studied by Mössbauer spectroscopy. Low-velocity Mössbauer spectra that were recorded in the temperature range from 5.7 K up to 300 K show a paramagnetic doublet with a broadening at temperatures below 77 K. The broadening can be explained by the appearance of a distribution of hyperfine magnetic fields due to the magnetic ordering of a part of the sample. The magnetically ordered fraction starts to decrease at temperatures below 20 K indicating a possible competition with the onsetting superconductive state.