1. Department of Physics The University of Hong Kong Hong Kong 999077 P. R. China
2. Polymer Composite Group (PCG) Physics Division PINSTECH P. O. Nilore Islamabad 45650 Pakistan
3. Electronic and Magnetic Materials Group (EMMG) Physics Division PINSTECH P. O. Nilore Islamabad 45650 Pakistan
4. Synchrotron‐Light for Experimental Science and Applications in the Middle East (SESAME) Allan 19252 Jordan
5. Helmholtz‐Zentrum Dresden‐Rossendorf Institute of Ion Beam Physics and Materials Research Bautzner Landstrasse 400 01328 Dresden Germany
6. CAS Key Lab of Inorganic Functional Materials and Devices Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China
7. Department of Physics University of Oslo P.O. Box 1048 Blindern Oslo 0316 Norway