Control of interstitial Fe and its impact on superconductivity of FeTe1/2Se1/2
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
Control of interstitial Fe and its impact on superconductivity of FeTe1/2Se1/2
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| Creator |
Awana, V. P. S.
Kumar, Anuj Pal, Anand |
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| Subject |
Applied Physics/Condensed Matter
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| Description |
The FeTe1/2Se1/2 samples are quenched during the vacuum sealed synthesis process to room temperature from 700 degrees C, 500 degrees C, 300 degrees C and room temperature (RT); named as 700Q, 500Q, 300Q and RTQ respectively. Though all samples except 700Q are crystallized in single phase with space group P4/nmm, the presence of interstitial Fe (Fe-int) at 2c site is increased from 5% for RTQ to 8% for 500Q. The 700Q sample is crystallized in Fe7Se8 phase. Also though the RTQ and 300Q are superconducting at 10 K and 13 K respectively, the 500Q and 700Q are not. Magnetic ordering (T-mag) is observed at around 125 K for all the samples. The prominence of T-mag in terms of effective moment is sufficiently higher for 500Q and 700Q than RTQ and 300Q. Summarily, it is found that quenching induced disorder affects the occupancy of Fe-int in FeTe1/2Se1/2 and thus both its superconducting and magnetic properties.
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| Publisher |
American Institute of Physic
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| Date |
2012
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| Type |
Conference or Workshop Item
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/3663/1/Control%20of%20interstitial%20Fe%20and%20its%20impact.pdf
Awana, V. P. S. and Kumar, Anuj and Pal, Anand (2012) Control of interstitial Fe and its impact on superconductivity of FeTe1/2Se1/2. In: 56th DAE-Solid State Physics Symposium (SSPS), DEC 19-23, 2011, SRM Univ, Kattankulathur, INDIA. |
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| Relation |
http://npl.csircentral.net/3663/
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