Multiple in-plane spin reorientation transitions in Fe/CoO bilayers grown on vicinal MgO(001)

Q. Li,1 T. Gu,1 J. Zhu,1 Z. Ding,1 J. X. Li,1 J. H. Liang,1 Y. M. Luo,1 Z. Hu,2 C. Y. Hua,2,3 H.-J. Lin,3 T. W. Pi,3 C. Won,4 and Y. Z. Wu1,* 1Department of Physics, State Key Laboratory of Surface Physics and Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China 2Max-Planck-Institut fur Chemische Physik fester Stoffe, Nothnitzer Strasse 40, 01187 Dresden, Germany 3National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan, Republic of China 4Department of Physics, Kyung Hee University, Seoul 130-701, Republic of Korea, China (Received 26 December 2014; revised manuscript received 15 March 2015; published 25 March 2015)