Main Page
About Science
Faculty Deanship
Letter of Dean
Overview of Deanship
Vice Deans
Vice Dean
Letter of Vice-dean
Overview of Vice-deanship
Vice Dean for Graduate Studies
Letter of Vice Dean for Graduate Studies
Overview of Vice Dean of Postgraduate Studies
Research and Innovation Unit
Vice Dean for Girls Campus
Faculty Management
Letter of Managing Director-Boys Campus
Letter of Managing Director-Girls Campus
Overview of Management
Educational Affairs
Males Campus
Staff
Females Campus
Contact Us
Research
عربي
English
About
Admission
Academic
Research and Innovations
University Life
E-Services
Search
Faculty of Sciences
Document Details
Document Type
:
Thesis
Document Title
:
MAGNETIC INTERACTIONS AMONG f ELECTRONS
التفاعلات المغناطيسية بين الكترونات المدار f
Subject
:
Physics
Document Language
:
Arabic
Abstract
:
Dependence of properties at nano scale offers an opportunity to experiment with materials. The fullerene molecule, C60, has just the right size and chemical stability to host a large variety of atoms. Endohedrally doped fullerenes has been synthesized in the past. These structures are important to understand the behavior of atoms with unfilled f-shell. A systematic theoretical study of behavior of rare earth ions should serve as a guideline to experimentalists and theoreticians as well. A rare earth doped endohedral fullerene shows an icosahedral symmetry. A group theoretic treatment of f-electrons in a strong icosahedral crystal field has been discussed in the present study. A many body perturbation theory has been used to calculate the exchange interactions among the pairs of rare earth ions with 2f-electrons. It is found that the doping of rare earth in fullerenes favors the emergence of magnetic order. The ground multiplet of pairs are found to be non magnetic. The exchange coupled electronic states of these pairs are found to be non magnetic. The exchange coupled electronic states of these pairs provide a chance to understand the optical behavior of these systems. The coupling of vibrational and electronic states provides the possibilities of Raman spectra. The existence of an accidental doublet in the ground multiplet suggests a reduction in symmetry from icosahedral to a lower group with two dimensional irreducible representations. It is believed that these studies will lead to a better understanding of optical and magnetic behavior of endohedral fullerenes.
Supervisor
:
Prof. Khursheed Athar Siddiqui
Thesis Type
:
Master Thesis
Publishing Year
:
1430 AH
2009 AD
Added Date
:
Sunday, December 5, 2010
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
أمل عبدالوهاب أبو حجر
ABOUHAJAR, AMAL ABDULWAHAB
Researcher
Master
Files
File Name
Type
Description
28072.pdf
pdf
Abstract
28073.pdf
pdf
Abstract
Back To Researches Page