عنوان :
بررسي ساختاري ماده‌ي MnO و محاسبه ضرايب هايزنبرگ، جملات دو مجذوري و دماي نيل آن
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده فيزيك
صفحه شمار :
نه، ۸۲ص.: مصور، جدول، نمودار
استاد راهنما :
مجتبي اعلائي
استاد مشاور :
فرهاد فضيله
توصيفگر ها :
عايق‌هاي مات , ضرايب هايزنبرگ , جملات دو مجذوري , سيستم‌هاي همبسته قوي , عناصر واسطه , دماي نيل , FLAPW , LDA+U
استاد داور :
ممتحن داخلي: فرهاد شهبازي، نفيسه رضايي
تاريخ ورود اطلاعات :
1397/07/24
چكيده انگليسي :
Investigating the Structure Properties of MnO and Calculating the Heisenberg Coefficients and Biquadrating Coefficients and Neel Temperature for MnO Hamid Nouri hamid nouri@ph iut ac ir June 18 2018 Department of Physics Isfahan University of Technology Isfahan 84156 83111 Iran University Code IUT 77142 Degree M Sc Language Farsi supervisor Dr Mojtaba Alaei m alaei@cc iut ac ir Abstract In recent decades strong correlation materials have been extensively studied due to their interesting physical properties and their breadth and variety Among them materials are filled with half orbitals d or f Most studied in theoretical empirical and computational fields in addition to Another important research on these materials is that due to the complex properties of these systems they have been described as a challenge in various fields The most important categories of these systems are matte insulators In this category of materials intermediate elemental oxides such as manganese oxide have attracted much attention due to its properties Typically to describe the electron behavior of these systems in the density function theory of the LDA U approach and FLAPW basic function will be used In this study the structural properties of manganese oxide have been investigated first Then to study the magnetic properties of the mentioned material to find the amount of exchange interaction between the first to fourth neighbors with the help of the Hamiltonian Heisenberg method Difference in the energy of different configurations and in parallel calculations Then using non homogeneous calculations we calculated the two particle coefficients in the Hamiltonian Heisenberg Finally with the aid of this quantitative calculation the mean field method is calculated to measure the temperature of the Neel Keywords Strong Correlated Systems Trantion Metal Mott Insulators Heisenberg Coefficients Biquadratic Coefficients Neel temperature LDA U FLAPW
استاد راهنما :
مجتبي اعلائي
استاد مشاور :
فرهاد فضيله
استاد داور :
ممتحن داخلي: فرهاد شهبازي، نفيسه رضايي
