Doping Effects of Co, Ni, and Cu in FeTe_{0.65}Se_{0.35} Single Crystals

• Authors: V. Bezusyy , D. Gawryluk , M. Berkowski , M. Cieplak
• Languages of publication: EN

Abstracts

EN

The resistivity, magnetoresistance, and magnetic susceptibility are measured in single crystals of FeTe_{0.65}Se_{0.35} with Cu, Ni, and Co substitutions for Fe. The crystals are grown by Bridgman's method. The resistivity measurements show that superconductivity disappears with the rate which correlates with the nominal valence of the impurity. From magnetoresistance we evaluate doping effect on the basic superconducting parameters, such as upper critical field and coherence length. We find indications that doping leads to two component superconducting behavior, possibly because of local charge depression around impurities.

Keywords

EN

74.25.F-; 74.25.Op; 74.62.Dh; 74.70.Xa

Discipline

• 74.62.Dh: Effects of crystal defects, doping and substitution(for specific crystal defects, see 61.72.-y)
• 74.25.Op: Mixed states, critical fields, and surface sheaths
• 74.25.F-: Transport properties
• 74.70.Xa: Pnictides and chalcogenides

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 4
• Pages: 816-819

Dates

published

2012-04

Contributors

author

V. Bezusyy

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

D. Gawryluk

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

M. Berkowski

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

M. Cieplak

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

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Identifiers

DOI

10.12693/APhysPolA.121.816