
Riyazuddin, Tentu Nageswara Rao, Imad Hussain, S. N. Khan*, and Bon Heun Koo† 
School of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam 51140, Korea *Department of Physics, Abdul Wali Khan University Mardan, Pakistan
Riyazuddin · Tentu Nageswara Rao · Imad Hussain · S. N. Khan* · 구본흔† 
창원대학교 신소재공학부, *압둘 왈리 칸 대학교 물리학과
This Article2019; 43(6): 831-837
Published online Nov 25, 2019
Correspondence toSchool of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam 51140, Korea *Department of Physics, Abdul Wali Khan University Mardan, Pakistan