Pressure effect on the order-disorder transformation in L1$_0$ FeNi
Materials Science
2020-02-20 v1
Abstract
The ordered phase of the FeNi system is known to have promising magnetic properties as a rare-earth-free permanent magnet. Understanding the parameter space that controls the order-disorder transformation is important to find growth conditions that stabilize the phase. Magnetic properties and chemical order-disorder transformation of FeNi are investigated as a function of lattice expansion using first-principles theory. Thermodynamic and magnetic calculations are performed using long-range order parameters, which is used to find the ordering temperature. Negative pressure promotes ordering and thus synthetic routes involving an increase in volume is expected to expand the stability field of the phase.
Keywords
Cite
@article{arxiv.2002.08076,
title = {Pressure effect on the order-disorder transformation in L1$_0$ FeNi},
author = {Li-Yun Tian and Olle Eriksson and Levente Vitos},
journal= {arXiv preprint arXiv:2002.08076},
year = {2020}
}