[1] Duy Tan Univ, Inst Res & Dev, 03 Quang Trung, Danang, Vietnam
[2] Hue Univ, Univ Educ, Dept Phys, 34 Le Loi, Hue City, Vietnam
[3] Hue Ind Coll, Dept Res Management & Int Relat, Hue City, Vietnam
[4] Univ Fire Fighting & Prevent, Dept Basic Sci, 243 Khuat Duy Tien, Hanoi, Vietnam
[5] Nguyen Hue Univ, Bien Hoa, Dong Nai Provin, Vietnam
[6] Vinh Univ, Vinh, Dong Nai Provin, Vietnam
[7] Ton Duc Thang Univ, Adv Inst Mat Sci, Lab Magnetism & Magnet Mat, Ho Chi Minh City, Vietnam
[8] Ton Duc Thang Univ, Fac Appl Sci, Ho Chi Minh City, Vietnam