| Autor: |
Bossoni, L., Romanò, L., Canfield, P. C., Lascialfari, A. |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
J. Phys.: Condens. Matter 26 (2014) 405703 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1088/0953-8984/26/40/405703 |
| Popis: |
We measured the static uniform spin susceptibility of Ba(Fe$_{1-x}$Rh$_x$)$_2$As$_2$ iron-based superconductors, over a broad range of doping ($0.041\leq x\leq 0.094$) and magnetic fields. At small fields ($H \le$ 1 kOe) we observed, above the transition temperature $T_c$, the occurrence of precursor diamagnetism, which is not ascribable to the Ginzburg-Landau theory. On the contrary, our data fit a phase fluctuation model, which has been used to interpret a similar phenomenology occurring in the high-$T_c$ cuprate superconductors. On the other hand, in presence of strong fields the unconventional fluctuating diamagnetism is suppressed, whereas 3D fluctuations are found, in agreement with literature. |
| Databáze: |
arXiv |
| Externí odkaz: |
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