Role of atomic vacancies and second-neighbor antiferromagnetic-exchange coupling in a ferromagnetic nanoparticle
Materials Science
2026-02-20 v1
Abstract
Several factors may be responsible for disorder and frustration in a magnetic nanoparticle, including atomic vacancies on the surface and inside, impurity atoms, long-range magnetic exchange coupling, etc. We use Monte-Carlo simulations within the Heisenberg model to examine the role of randomly distributed atomic vacancies and long-range magnetic-exchange coupling on the temperature-dependent magnetic properties of ferromagnetic nanoparticles. In particular, we study the role of the second-neighbor antiferromagnetic exchange coupling and missing atoms inside the particle resulting in broken nearby bonds. We find that both factors may enhance the superparamagnetic behaviors of such particles.
Keywords
Cite
@article{arxiv.2602.17057,
title = {Role of atomic vacancies and second-neighbor antiferromagnetic-exchange coupling in a ferromagnetic nanoparticle},
author = {Harun Al Rashid and Muskan Sharma and Shruti and Dheeraj Kumar Singh},
journal= {arXiv preprint arXiv:2602.17057},
year = {2026}
}
Comments
11pages, 6 figures, typos corrected