Speaker
Description
Magnetic materials stand as a key component in the industry. One of the most common and used magnetic material parameters is magnetocrystalline anisotropy, which takes place in permanent magnets, storage devices, etc. Besides, magnetoelastic behavior is widely used in many applications, such as in acoustic actuators, transducers, or sensors, providing desirable fast response and high efficiency.
The magnetoelastic behavior of cubic transition metallic systems is weak[1]. Therefore, we are focusing on the tetragonal systems composed of elements with large spin-orbit coupling, e.g. Pt, and magnetic transition elements. Recently, the magnetoelastic behavior of ferromagnetic FePt [2,3] was investigated and its origin was analyzed. However, the extent to which these phenomena exist in antiferromagnets is unknown.
Therefore, we focus on the magnetoelastic coefficients and magnetostriction of MnPt in L1$_{0}$ structure, which are determined by using the finite displacement method and pseudo-potential-based plane wave ab initio calculations.
References:
[1] P. Nieves et al., MAELAS 2.0: A new version of a computer program for the calculation of magneto-elastic properties, Computer Physics Communications 271 (2022) 108197
[2] T. Das, P. Nieves, D. Legut: Large magnetocrystalline anisotropic energy and its impact on magnetostrictions of L10-FePt, Journal of Physics D: Applied Physics (accepted 2024).
[3] P. Nieves and D. Legut: Second-order anisotropy due to magnetostriction for L10-FePti, Solid State Sciences (under review 2024)
