Phase Transitions and Multicritical Points in the Mixed Spin - 2 and Spin - 7/2 Ising Ferrimagnetic System with Two Crystal Field Intera Ctions
| المصدر: | مجلة العلوم الإنسانية والتطبيقية |
|---|---|
| الناشر: | الجامعة الأسمرية الإسلامية زليتن - كليتى الآداب والعلوم |
| المؤلف الرئيسي: | Abubrig, Fathi (Author) |
| مؤلفين آخرين: | Gneper, Mohamed (Co-Author) |
| المجلد/العدد: | ع28 |
| محكمة: | نعم |
| الدولة: |
ليبيا |
| التاريخ الميلادي: |
2016
|
| الشهر: | يونيو |
| الصفحات: | 34 - 51 |
| رقم MD: | 829417 |
| نوع المحتوى: | بحوث ومقالات |
| اللغة: | الإنجليزية |
| قواعد المعلومات: | HumanIndex |
| مواضيع: | |
| كلمات المؤلف المفتاحية: |
Mixed Spin System | Ising Model | Sublattice Magnetization | Critical Points | Anisotropy
|
| رابط المحتوى: |
عدد مرات التحميل
2
| المستخلص: |
The critical temperatures of the mixed spin-2 and spin-7/2 Ising ferrimagnetic system with two crystal-field interactions, DA for spin-2 and DB for spin-7/2, are investigated in the absence of an external magnetic field by using the mean-field theory based on Bogoliubov inequality for the free energy. The ground-state phase diagram is constructed. The phase diagrams of the critical temperatures are obtained in the temperature-anisotropy plane and the thermal variation of the sublattice magnetizations is investigated in detail. Besides the second-order phase transition lines, two types of the first-order lines; one ending at tricritical points and the other ending at isolated critical points, are found. |
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