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Результаты исследований: Вклад в журнал › Статья › Рецензирование
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TY - JOUR
T1 - Temporal Spinodal Decomposition of the Fe 1+ y Te 1− x Se x Crystals and its Impact on Superconducting Properties
AU - Gimazov, Ilnur
AU - Kiiamov, Airat
AU - Sadakov, Andrey
AU - Lyadov, Nikolai
AU - Chareev, Dmitriy
AU - Vasiliev, Aleksander
AU - Talanov, Yurii
PY - 2022/10/1
Y1 - 2022/10/1
N2 - Precipitated phases, formed by spinodal decomposition during long-term storage in a desiccator in dry atmosphere, are found with the X-ray diffraction (XRD) study of Fe1+y Te1−x Se x crystals. Their compositions are deduced from the position of satellite Bragg reflections in the XRD pattern. In particular, in the Fe1.19Te0.58Se0.42 crystal, traces of phases with significantly higher tellurium content, namely Fe1+y Te0.9Se0.1 and FeTe, are found. The detection and analysis of side bands in the diffraction pattern of an aged crystal indicate spinodal decay. It leads to the formation of a modulated structure in the entire volume of the sample and to strain in the crystal structure. In turn, this results in a significant improvement in the superconducting characteristics. Specifically, the resistive transition narrows to 2 K at the onset temperature 14.5 K, and the superconducting volume fraction increases up to about 100%.
AB - Precipitated phases, formed by spinodal decomposition during long-term storage in a desiccator in dry atmosphere, are found with the X-ray diffraction (XRD) study of Fe1+y Te1−x Se x crystals. Their compositions are deduced from the position of satellite Bragg reflections in the XRD pattern. In particular, in the Fe1.19Te0.58Se0.42 crystal, traces of phases with significantly higher tellurium content, namely Fe1+y Te0.9Se0.1 and FeTe, are found. The detection and analysis of side bands in the diffraction pattern of an aged crystal indicate spinodal decay. It leads to the formation of a modulated structure in the entire volume of the sample and to strain in the crystal structure. In turn, this results in a significant improvement in the superconducting characteristics. Specifically, the resistive transition narrows to 2 K at the onset temperature 14.5 K, and the superconducting volume fraction increases up to about 100%.
KW - Fe-based superconductors
KW - spinodal decompositions
KW - superconducting transitions
UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=000805300800001
UR - http://www.scopus.com/inward/record.url?scp=85131178949&partnerID=8YFLogxK
U2 - 10.1002/pssb.202100646
DO - 10.1002/pssb.202100646
M3 - Article
VL - 259
SP - 2100646
JO - physica status solidi (b)
JF - physica status solidi (b)
SN - 0370-1972
IS - 10
M1 - 2100646
ER -
ID: 31040999