Correlation of interface interdiffusion and skyrmionic phases

PC Carvalho, IP Miranda, J Brandão, A Bergman… - Nano Letters, 2023 - ACS Publications
Magnetic skyrmions are prime candidates for the next generation of spintronic devices.
Skyrmions and other topological magnetic structures are known to be stabilized by the …

First-principles Dzyaloshinskii–Moriya interaction in a non-collinear framework

R Cardias, A Szilva, MM Bezerra-Neto, MS Ribeiro… - Scientific Reports, 2020 - nature.com
We have derived an expression of the Dzyaloshinskii–Moriya interaction (DMI), where all the
three components of the DMI vector can be calculated independently, for a general, non …

Temperature dependence of magnetic excitations: Terahertz magnons above the Curie temperature

HJ Qin, K Zakeri, A Ernst, J Kirschner - Physical Review Letters, 2017 - APS
When an ordered spin system of a given dimensionality undergoes a second order phase
transition, the dependence of the order parameter, ie, magnetization on temperature, can be …

Theory of noncollinear interactions beyond Heisenberg exchange: Applications to bcc Fe

A Szilva, D Thonig, PF Bessarab, YO Kvashnin… - Physical Review B, 2017 - APS
We show for a simple noncollinear configuration of the atomistic spins (in particular, where
one spin is rotated by a finite angle in a ferromagnetic background) that the pairwise energy …

Comment on “Proper and improper chiral magnetic interactions”

R Cardias, A Szilva, A Bergman, Y Kvashnin… - Physical Review B, 2022 - APS
In a recent paper by dos Santos Dias et al.[Phys. Rev. B 103, L140408 (2021)
10.1103/PhysRevB. 103. L140408], a critique of earlier works analyzing low-energy spin …

Mechanisms behind large Gilbert damping anisotropies

IP Miranda, AB Klautau, A Bergman, D Thonig… - Physical Review B, 2021 - APS
A method with which to calculate the Gilbert damping parameter from a real-space electronic
structure method is reported here. The anisotropy of the Gilbert damping with respect to the …

Complex magnetic textures in ultrathin films

PC Carvalho, IP Miranda, AB Klautau, A Bergman… - Physical Review …, 2021 - APS
A combined approach using first-principles calculations and spin dynamics simulations is
applied to study Ni/Ir n/Pt (111)(n= 0, 1, 2) films. The lowest-energy states are predicted to be …

Coupled spin-lattice dynamics from the tight-binding electronic structure

R Cardias, S Streib, Z Lu, M Pereiro, A Bergman… - Physical Review B, 2024 - APS
We developed a method which performs the coupled adiabatic spin and lattice dynamics
based on the tight-binding electronic structure model, where the intrinsic magnetic field and …

Temperature-induced increase of spin spiral periods

A Finco, L Rózsa, PJ Hsu, A Kubetzka… - Physical Review Letters, 2017 - APS
Spin-polarized scanning tunneling microscopy investigations reveal a significant increase of
the magnetic period of spin spirals in three-atomic-layer-thick Fe films on Ir (111), from about …

Insights on induced magnetic moments and spin textures in synthetic ferrimagnetic Pt/Co/Gd heterolayers

J Brandão, PC Carvalho, IP Miranda, TJA Mori… - arXiv preprint arXiv …, 2024 - arxiv.org
To develop new devices based on synthetic ferrimagnetic (S-FiM) heterostructures,
understanding the material's physical properties is pivotal. Here, the induced magnetic …