Magnetization reversal modes and coercive field dependence on perpendicular magnetic anisotropy in FePt thin films

Román, A. ; López Pedroso, A. ; Bouzehouane, K. ; Gómez, J. E. ; Butera, A. ; Aguirre, M. H. (Universidad de Zaragoza) ; Soares, M. Medeiros ; Garcia, C. ; Steren, L. B.

Resumen: The competition between shape and perpendicular magnetic anisotropies in magnetic thin films gives rise to unusual magnetic behaviors. In ferromagnetic thin films, the presence of an out-of-plane component of the magnetic anisotropy may induce a transition from planar to stripe-like magnetic domains above a critical thickness, $t_{\mathrm c}$. In this article, we present a detailed study of the magnetization switching mechanism in FePt thin films, where this phenomenon is observed. Using micromagnetic simulations and experiments, we found that below $t_{\mathrm c}$ the reversal mechanism is well described by the two-phase model while above this thickness the magnetization within each stripe reverses by coherent rotation. We also analyzed the out-of-plane component of the magnetic anisotropy and its temperature dependence, probing that substrate-induced strains are responsible for the abnormal coercive field behavior observed for FePt films with $t\gt t_{\mathrm c}$.

Idioma: Inglés

DOI: 10.1088/1361-6463/acdd0e

Año: 2023

Publicado en: JOURNAL OF PHYSICS D-APPLIED PHYSICS 56, 39 (2023), 395002 [14 pp.]
ISSN: 0022-3727

Factor impacto JCR: 3.1 (2023)

Categ. JCR: PHYSICS, APPLIED rank: 63 / 179 = 0.352 (2023) - Q2 - T2

Factor impacto CITESCORE: 6.8 - Condensed Matter Physics (Q1) - Electronic, Optical and Magnetic Materials (Q1) - Acoustics and Ultrasonics (Q1) - Surfaces, Coatings and Films (Q1)

Factor impacto SCIMAGO: 0.681 - Acoustics and Ultrasonics (Q1) - Surfaces, Coatings and Films (Q1) - Condensed Matter Physics (Q2) - Electronic, Optical and Magnetic Materials (Q2)

Financiación: info:eu-repo/grantAgreement/EC/H2020/734187/EU/Spin conversion, logic storage in oxide-based electronics/SPICOLOST

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)