 |
 |
 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Analytical Study of AC Magnetic Susceptibility of (Bi, Pb) Sr-Ca-Cu-O Superconducting Systems Using Bean Critical State Model) ผู้เขียน: ดร.ณัฐณรัณ (สุปรียา) ตรีวิจิตรเกษม, รองศาสตราจารย์ , ดร.อดิศักดิ์ บุญชื่น, รองศาสตราจารย์ ,  Chirawat Chantharangsi, ชุติมา ภาคสัญไชย สื่อสิ่งพิมพ์:pdf AbstractAC magnetic susceptibility, ?ac, as a function of temperature, T, and applied field amplitude, H, of (Bi1.6Pb0.4)Sr2Ca2Cu3O? and (Bi1.7Pb0.3)Sr2Ca2Cu3O? superconducting systems was analyzed using Bean critical state model. The critical temperature and grain volume fraction of specimens were utilized from the real part of AC susceptibility measurements, while the pinning force density was utilized from the imaginary part of the susceptibility measurements. Calculations using Mathematica program indicated that (Bi1.6Pb0.4)Sr2Ca2Cu3O? superconductor of nominal composition (2234), prepared by solid reaction with an intermediate ground and pressed, provided the biggest hysteresis area, and the calculated ?ac(H,T) results were comparable with the experimental ?ac(H,T) data. |