Speaker
Dr
Sultan Demirdis
(Forschungszentrum Julich GmbH, Julich Center for Neutron Science , JCNS at MLZ)
Description
Small-angle neutron scattering reveals the presence of an ordered vortex solid phase in high quality optimally doped single crystalline (Ba1-xKx)Fe2As2. Vortex solid Bragg peaks are not described by the Bragg glass prediction. Simultaneously, the vortex solid structure factor shows a sharp drop as function of magnetic field, that is correlated with the second peak feature in isothermal hysteresis loops. Hence, the vortex order-disorder transition in this material is unrelated to the presence of vortex solid dislocations.
Primary author
Dr
Sultan Demirdis
(Forschungszentrum Julich GmbH, Julich Center for Neutron Science , JCNS at MLZ)
Co-authors
Dr
Kees van der Beek
(Laboratoire des Solides Irradies, Ecole Polytechnique,CNRS UMR 7642 & CEA-DSM-IRAMIS, Universite Paris-Saclay, F 91128 Palaiseau cedex, France)
Sebastian Muehlbauer
Dr
Thomas Wolf
(Karlsruher Institut fur Technologie, Institut fur Festkorperphysik, D-7602, Karlsruhe, Germany)
Yixi Su
