E.M. Jubeer - Department of Physics, Farook College, Kozhikode, Kerala, India
M. Aslam Manthrammel - King Khalid University
Mohd Shkir - King Khalid University
P.A. Subha - Department of Physics, Farook College, Kozhikode, Kerala, India
I.S. Yahia - King Khalid University
S.A. Alfaify - King Khalid University