M ar 2 01 7 Visualization of Magnetic Flux Structure in Phosphorus-Doped EuFe 2 As 2 Single Crystals

I. S. Veshchunov, L.Ya. Vinnikov, V. S. Stolyarov, N. Zhou, Z. X. Shi, X. F. Xu, S. Yu. Grebenchuk,, D. S. Baranov , I. A. Golovchanskiy, S. Pyon, Yue Sun, Wenhe Jiao, Guanghan Cao, T. Tamegai, and A. A. Golubov Moscow Institute of Physics and Technology (State University), Dolgoprudnyi, Moscow region, 141700 Russia Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432 Russia Department of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, 211189 Nanjing, China Department of Physics, Changshu Institute of Technology, Changshu 215500, People’s Republic of China Laboratoire de physique et detude des materiaux, LPEM-UMR8213/CNRS-ESPCI ParisTech-UPMC, 75005 Paris, France National University of Science and Technology MISIS, Moscow, 119049 Russia Institute for Solid State Physics, The University of Tokyo, 277-8581 Kashiwa, Japan Department of Physics, Zhejiang University, 310027 Hangzhou, China and Faculty of Science and Technology and MESA+ Institute of Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands