1. Department of Physics, Faculty of Arts and Sciences, Namik Kemal University, 59030 Tekirdag, Turkey
2. Novel Alloys Design and Development Laboratory (NOVALAB), Department of Metallurgical and Materials Engineering, Middle East Technical University, 06531 Ankara, Turkey
3. Physics Department, Faculty of Arts and Sciences, Uludag University, Gorukle Campus, 16059 Bursa, Turkey