| Autor: |
Park, J. T., Inosov, D. S., Niedermayer, Ch., Sun, G. L., Haug, D., Christensen, N. B., Dinnebier, R., Boris, A. V., Drew, A. J., Schulz, L., Shapoval, T., Wolff, U., Neu, V., Yang, Xiaoping, Lin, C. T., Keimer, B., Hinkov, V. |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. Lett. 102, 117006 (2009) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.102.117006 |
| Popis: |
Here we present a combined study of the slightly underdoped novel pnictide superconductor Ba(1-x)K(x)Fe(2)As(2) by means of X-ray powder diffraction, neutron scattering, muon spin rotation (muSR), and magnetic force microscopy (MFM). Commensurate static magnetic order sets in below Tm ~ 70 K as inferred from the emergence of the magnetic (1 0 -3) reflection in the neutron scattering data and from the observation of damped oscillations in the zero-field-muSR asymmetry. Transverse-field muSR below Tc shows a coexistence of magnetically ordered and non-magnetic states, which is also confirmed by MFM imaging. We explain such coexistence by electronic phase separation into antiferromagnetic and superconducting/normal state regions on a lateral scale of several tens of nanometers. Our findings indicate that such mesoscopic phase separation can be considered an intrinsic property of some iron pnictide superconductors. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
