Interplay Between Spin Density Wave and Superconductivity in `122' Iron Pnictides: ^{57}Fe Mössbauer Study

• Authors: A. Błachowski , K. Ruebenbauer , J. Żukrowski , Z. Bukowski , M. Matusiak , J. Karpinski
• Languages of publication: EN

Abstracts

EN

Iron-based superconductors Ba_{0.7}Rb_{0.3}Fe_{2}As_{2} and CaFe_{1.92}Co_{0.08}As_{2} of the `122' family have been investigated by means of the 14.41-keV Mössbauer transition in ^{57}Fe versus temperature ranging from the room temperature till 4.2 K. A comparison is made with the previously investigated parent compounds BaFe_{2}As_{2} and CaFe_{2}As_{2}. It has been found that Mössbauer spectra of these superconductors are composed of the magnetically split component due to development of spin density wave and non-magnetic component surviving even at lowest temperatures. The latter component is responsible for superconductivity. Hence, the superconductivity occurs in the part of the sample despite the sample is single phase. This phenomenon is caused by the slight variation of the dopant concentration across the sample (crystal).

Keywords

EN

74.70.Xa; 75.30.Fv; 76.80.+y

Discipline

• 75.30.Fv: Spin-density waves
• 76.80.+y: Mössbauer effect; other γ-ray spectroscopy(see also 33.45.+x Mössbauer spectra—in atomic and molecular physics; for biophysical applications, see 87.64.kx; for chemical analysis applications, see 82.80.Ej)
• 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: 726-729

Dates

published

2012-04

Contributors

author

A. Błachowski

• Mössbauer Spectroscopy Division, Institute of Physics, Pedagogical University, PL-30-084 Kraków, ul. Podchorążych 2, Poland

author

K. Ruebenbauer

• Mössbauer Spectroscopy Division, Institute of Physics, Pedagogical University, PL-30-084 Kraków, ul. Podchorążych 2, Poland

author

J. Żukrowski

• Department of Solid State Physics, AGH University of Science and Technology, A. Mickiewicza 30 Av., PL-30-059 Kraków, Poland

author

Z. Bukowski

• Institute of Low Temperatures and Structure Research, Polish Academy of Sciences, PL-50-422 Wrocław, ul. Okólna 2, Poland

author

M. Matusiak

• Institute of Low Temperatures and Structure Research, Polish Academy of Sciences, PL-50-422 Wrocław, ul. Okólna 2, Poland

author

J. Karpinski

• Laboratory for Solid State Physics, ETH Zurich, CH-8093 Zurich, Switzerland

References

• 1. D.C. Johnson, Adv. Phys. 59, 803 (2010)
• 2. M.D. Lumsden, A.D. Christianson, J. Phys. Condens. Matter 22, 203203 (2010)
• 3. Z. Guguchia, Z. Shermadini, A. Amato, A. Maisuradze, A. Shengelaya, Z. Bukowski, H. Luetkens, R. Khasanov, J. Karpinski, H. Keller, Phys. Rev. B 84, 094513 (2011)
• 4. M. Matusiak, Z. Bukowski, J. Karpinski, Phys. Rev. B 81, 020510(R) (2010)
• 5. I. Nowik, I. Felner, Z. Ren, G.H. Cao, Z.A. Xu, J. Phys. Condens. Matter 23, 065701 (2011)
• 6. A. Błachowski, K. Ruebenbauer, J. Żukrowski, K. Rogacki, Z. Bukowski, J. Karpinski, Phys. Rev. B 83, 134410 (2011)
• 7. K. Ruebenbauer, Ł. Duraj, www.elektron.up.krakow.pl/mosgraf-2009
• 8. D.H. Ryan, W.N. Rowan-Weetaluktuk, J.M. Cadogan, R. Hu, W.E. Straszheim, S.L. Bud'ko, P.C. Canfield, Phys. Rev. B 83, 104526 (2011)
• 9. Z. Li, X. Ma, H. Pang, F. Li, arXiv:1103.0098 (2011)
• 10. I. Nowik, I. Felner, M. Zhang, A.F. Wang, X.H. Chen, Supercond. Sci. Technol. 24, 095015 (2011)
• 11. A. Błachowski, K. Ruebenbauer, J. Żukrowski, Z. Bukowski, K. Rogacki, P.J.W. Moll, J. Karpinski, Phys. Rev. B 84, 174503 (2011)

Identifiers

DOI

10.12693/APhysPolA.121.726