Electronic, Magnetic, and Structural Properties of V2CoAl: Experimental and Computational Study

Authors

Parashu Kharel, South Dakota State UniversityFollow
Cole Brown, South Dakota State University
Brandon Schmidt, University of Northern IowaFollow
Caden Sadler, University of Northern IowaFollow
Salimatou Diallo, University of Northern IowaFollow
Mohd Anas, South Dakota State UniversityFollow
Paul M. Shand, University of Northern IowaFollow
Pavel V. Lukashev, University of Northern IowaFollow

Comments

First published in AIP Advances, v15 i3 (Mar 2025) published by AIP Publishing. DOI: https://doi.org/10.1063/9.0000851

Document Type

Article

Publication Version

Published Version

Journal/Book/Conference Title

Aip Advances

Volume

15

Issue

3

First Page

1

Last Page

7

Abstract

Here, we present results of combined experimental and computations study of V2CoAl, a Heusler alloy that exhibits nearly perfect spin-polarization. Our calculations indicate that this material maintains a high degree of spin-polarization (over 90%) in the wide range of lattice parameters, except at the largest considered unit cell volume. The magnetic alignment of V2CoAl is ferrimagnetic, due to the antialignment of the magnetic moments of vanadium atoms in their two sublattices. The calculated total magnetic moment per formula unit is nearly integer at the optimal lattice parameter and at the smaller volumes of the unit cell, but it deviated from the integer values as the unit cell expands. This is consistent with the calculated variation in the degree of spin polarization with lattice constant. The expected ferrimagnetic behavior has been observed in the arc-melted V2CoAl sample, with a Curie temperature of about 80 K. However, the saturation magnetization is significantly smaller than the theoretical prediction of ∼2 μB/f.u., most likely due to the observed B2-type atomic disorder. The samples exhibit metallic electron transport across the measurement range of 2 K to 300 K.

Department

Department of Physics

Original Publication Date

3-5-2025

Object Description

1 PDF File

DOI of published version

10.1063/9.0000851

Repository

UNI ScholarWorks, Rod Library, University of Northern Iowa

Copyright

©2025 The Author(s)

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.

Language

en

File Format

application/pdf

Recommended Citation

Kharel, Parashu; Brown, Cole; Schmidt, Brandon; Sadler, Caden; Diallo, Salimatou; Anas, Mohd; Shand, Paul M.; and Lukashev, Pavel V., "Electronic, Magnetic, and Structural Properties of V2CoAl: Experimental and Computational Study" (2025). Faculty Publications. 6787.
https://scholarworks.uni.edu/facpub/6787