- Tytuł:
- Interplay Between Spin Density Wave and Superconductivity in `122 Iron Pnictides: $\text{}^{57}Fe$ Mössbauer Study
- Autorzy:
-
Błachowski, A.
Ruebenbauer, K.
Żukrowski, J.
Bukowski, Z.
Matusiak, M.
Karpinski, J. - Powiązania:
- https://bibliotekanauki.pl/articles/1431157.pdf
- Data publikacji:
- 2012-04
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
74.70.Xa
75.30.Fv
76.80.+y - Opis:
- 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 $\text{}^{57}Fe$ 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).
- Źródło:
-
Acta Physica Polonica A; 2012, 121, 4; 726-729
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł