Tailoring the Magnetic Anisotropy in CoRh Nanoalloys: Experiment and Theory
M. Mu\~noz-Navia (1), J. Dorantes-D\'avila (1), D. Zitoun (2), C., Amiens (2), N. Jaouen (3), A. Rogalev (3), M. Respaud (4), and G. M. Pastor, (5) ((1) Instituto de F\'isica, Universidad Aut\'onoma de San Luis Potos\'i,, Mexico; (2) Laboratoire de Chimie de Coordination, CNRS
TL;DR
This study investigates how chemical order and composition influence the magnetic anisotropy energy in CoRh nanoalloys through combined experimental and theoretical approaches, revealing non-trivial dependencies and key electronic factors.
Contribution
It provides new insights into the relationship between chemical order, magnetic moments, and anisotropy in CoRh nanoalloys, supported by both experiments and electronic calculations.
Findings
Non-monotonous dependence of MAE on composition and order
Chemical order significantly affects magnetic properties
Induced 4d moments and interfaces control anisotropy
Abstract
The magnetic moments and magnetic anisotropy energy (MAE) of CoRh alloy nanoparticles are determined experimentally and theoretically. Non-trivial correlations between chemical order, magnetic order and MAE are revealed. A remarkable non-monotonous dependence of the MAE as a function of composition and chemical order is observed that opens novel possibilities of tuning the magnetic properties of nanoalloys. The observations are successfully compared and analyzed with our electronic calculations. In this way we clearly demonstrate that the induced 4d moments and the 3d-4d interfaces are the key parameters controlling the magneto-anisotropic behavior.
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