Magnetic Properties of FeSeTe Compound Crystallized from Liquid Phase

• Authors: S. Lewandowski , M. Berkowski , V. Tarenkov , A. D'yachenko , A. Abal'oshev , I. Abal'osheva , D. Gawryluk , V. Domukhovski , S. Sidorov , D. Boichenko
• Languages of publication: EN

Abstracts

EN

We report on measurements of samples with nominal composition FeSe_{0.5}Te_{0.5}, crystallized by the Bridgman method. Magnetic and transport properties of the samples were examined. The measurements confirm the coexistence of ferromagnetism and superconductivity below the superconducting transition temperature. The ferromagnetic contribution to magnetization, estimated at 10%, might be caused by the presence of ferrimagnetic Fe_7Se_8, which occupies about 10% of sample volume. From the Andreev spectroscopy we found superconducting energy gap Δ = 2.6 meV at T = 4.2 K, and from magnetization measurements the critical temperature T_c = 15.8 K. The critical current density in magnetic field H = 4 kOe, determined from magnetization measurements, is j_c = (1-2) × 10^4 A/cm^2 and weakly depends on magnetic field intensity.

Keywords

EN

74.25.Ha; 74.45.+c; 74.62.Bf; 74.70.Xa; 75.30.Cr

Discipline

• 75.30.Cr: Saturation moments and magnetic susceptibilities
• 74.62.Bf: Effects of material synthesis, crystal structure, and chemical composition(for methods of materials synthesis, see 81.20.-n)
• 74.25.Ha: Magnetic properties including vortex structures and related phenomena(for vortices, magnetic bubbles, and magnetic domain structure, see 75.70.Kw)
• 74.45.+c: Proximity effects; Andreev reflection; SN and SNS junctions
• 74.70.Xa: Pnictides and chalcogenides

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 2
• Pages: 289-291

Dates

published

2010-08

Contributors

author

S. Lewandowski

• Instytut Fizyki PAN, al. Lotników 32/46, 02-668 Warszawa, Poland

author

M. Berkowski

• Instytut Fizyki PAN, al. Lotników 32/46, 02-668 Warszawa, Poland

author

V. Tarenkov

• Donetsk Institute for Physics and Engineering, R. Luxemburg 72, 83114 Donetsk, Ukraine

author

A. D'yachenko

• Donetsk Institute for Physics and Engineering, R. Luxemburg 72, 83114 Donetsk, Ukraine

author

A. Abal'oshev

• Instytut Fizyki PAN, al. Lotników 32/46, 02-668 Warszawa, Poland

author

I. Abal'osheva

• Instytut Fizyki PAN, al. Lotników 32/46, 02-668 Warszawa, Poland

author

D. Gawryluk

• Instytut Fizyki PAN, al. Lotników 32/46, 02-668 Warszawa, Poland

author

V. Domukhovski

• Instytut Fizyki PAN, al. Lotników 32/46, 02-668 Warszawa, Poland

author

S. Sidorov

• Donetsk Institute for Physics and Engineering, R. Luxemburg 72, 83114 Donetsk, Ukraine

author

D. Boichenko

• Donetsk Institute for Physics and Engineering, R. Luxemburg 72, 83114 Donetsk, Ukraine

References

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Identifiers

DOI

10.12693/APhysPolA.118.289