1. Department of Physics King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia
2. Institute of Applied Materials Karlsruhe Institute of Technology 76131 Karlsruhe Germany
3. Institute for Superconducting and Electronic Materials University of Wollongong North Wollongong NSW 2500 Australia
4. Interdisciplinary Research Center for Renewable Energy and Power Systems King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia