First Principles Calculations of Doped Mnbi Compounds

Author

Sultana Abdullah Ababtin

Issuing Body

Mississippi State University

Advisor

Kim, Seong- Gon

Committee Member

Dunne, James A.

Committee Member

Clay, R. Torsten

Date of Degree

5-9-2015

Document Type

Graduate Thesis - Open Access

Major

Physics

Degree Name

Master of Science (M.S.)

College

College of Arts and Sciences

Department

Department of Physics and Astronomy

Abstract

We investigate the effect of the substitution of Ni, Ti and Co in MnBi using first principles calculations based on density functional theory (DFT) within the generalized gradient approximation (GGA). We also performed total energy calculations to compare different structures to determine the ground state structures and investigate their magnetic properties. Our calculation shows that the substitution of Ni, Co and Ti lowers the total magnetization of MnBi. We also found that the stable structure of Ni and Ti substitute is to replace Mn atoms in their regular site while the substitute Co is most stable when Co occupies the interstitial site of MnBi unit cell.

URI

https://hdl.handle.net/11668/17797

Recommended Citation

Ababtin, Sultana Abdullah, "First Principles Calculations of Doped Mnbi Compounds" (2015). Theses and Dissertations. 2298.
https://scholarsjunction.msstate.edu/td/2298