| About this Abstract |
| Meeting |
2016 TMS Annual Meeting & Exhibition
|
| Symposium
|
2016 Technical Division Student Poster Competition
|
| Presentation Title |
SPU-5: First Principles Study of Lattice Disordering in CuNiMnAl and CuNiMnSn Heusler Alloys |
| Author(s) |
Shifrah Aron-Dine, Greg Pomrehn, Aurora Pribram-Jones, Kevin Laws, Michael Ferry, Lori Bassman |
| On-Site Speaker (Planned) |
Shifrah Aron-Dine |
| Abstract Scope |
In this work density functional theory calculations on new four-component equiatomic Heusler alloys, CuNiMnAl and CuNiMnSn, are presented. These ferromagnetic alloys exhibit metal-like band structures for the majority spin electrons with a discrete energy gap in the minority spin states. These compositionally-complex alloys have potential application in spintronics due to their high spin polarization, magnetization, and Curie temperature. In addition, they are less expensive and more ductile than other alloys currently used in spintronic applications. This work characterizes the tendency for atomic disorder and the effect of disorder on the electronic properties of these structures. Density functional calculations are performed on ordered and disordered atomic arrangements in the Heusler lattice -- with disorder from 1%-25% on constant and varying sublattices. Favorable disorder and changes in electronic structure and magnetization are explored. These results are used in combination with a Monte Carlo method to predict expected magnetic behavior. |
| Proceedings Inclusion? |
Definite: None Selected |