by Eugenia Sebastiani-Tofano, Ana Parente, Pedro L. Alcázar Ruano, Manuel Abuín, Álvaro González-García, Jesús López-Sánchez, Juan Rubio-Zuazo, Miguel Manso Silván, Arantzazu Mascaraque, Miguel Ángel González Barrio, Mariela Menghini, Ivan K. Schuller, Ali C. Basaran, Elvira M. González, Oscar Rodríguez de la Fuente and Álvaro Muñoz-Noval
Abstract:
In this work, we have controlled locally the magnetic anisotropy of PdCo multilayers using ion beam modification. First, we have used techniques with different probing depths to confirm that cobalt is partially oxidized in the Pd/Co multilayers exhibiting PMA fabricated by sputtering, presumably due to the diffusion of atmospheric oxygen migrated through the Pd capping layer. Then, low energy ion bombardment has been employed to induce a structural disorder in the upper layers of the multilayer, gradually reducing the PMA at local scale with increasing ion doses. Medium ion doses lead to a marked decline in PMA, resulting in equivalent magnetic anisotropy directions and the loss of characteristic labyrinthine magnetic domain morphology. High ion doses completely suppress PMA, yielding a typical in-plane shape anisotropy. By combining controlled PMA reduction via lithographic techniques, we create elongated structures displaying distinct magnetic responses; bombarded regions exhibit reduced PMA, whereas adjacent regions maintain their PMA. Notably, regions with reduced PMA do not disrupt the distribution of perpendicular magnetic domains in neighboring PMA regions, even at widths as narrow as 500 nm, demonstrating the robustness of the PMA domain structure.
Reference:
Eugenia Sebastiani-Tofano, Ana Parente, Pedro L. Alcázar Ruano, Manuel Abuín, Álvaro González-García, Jesús López-Sánchez, Juan Rubio-Zuazo, Miguel Manso Silván, Arantzazu Mascaraque, Miguel Ángel González Barrio, Mariela Menghini, Ivan K. Schuller, Ali C. Basaran, Elvira M. González, Oscar Rodríguez de la Fuente and Álvaro Muñoz-Noval, “Local control of perpendicular magnetic anisotropy of Pd/Co multilayers via ion bombardment”, Journal of Magnetism and Magnetic Materials, vol. 630, pp. 173469.
Bibtex Entry:
@article{sebastiani-tofano_local_2025,
title = {Local control of perpendicular magnetic anisotropy of {Pd}/{Co} multilayers via ion bombardment},
volume = {630},
issn = {0304-8853},
url = {https://www.sciencedirect.com/science/article/pii/S0304885325007012},
doi = {10.1016/j.jmmm.2025.173469},
abstract = {In this work, we have controlled locally the magnetic anisotropy of PdCo multilayers using ion beam modification. First, we have used techniques with different probing depths to confirm that cobalt is partially oxidized in the Pd/Co multilayers exhibiting PMA fabricated by sputtering, presumably due to the diffusion of atmospheric oxygen migrated through the Pd capping layer. Then, low energy ion bombardment has been employed to induce a structural disorder in the upper layers of the multilayer, gradually reducing the PMA at local scale with increasing ion doses. Medium ion doses lead to a marked decline in PMA, resulting in equivalent magnetic anisotropy directions and the loss of characteristic labyrinthine magnetic domain morphology. High ion doses completely suppress PMA, yielding a typical in-plane shape anisotropy. By combining controlled PMA reduction via lithographic techniques, we create elongated structures displaying distinct magnetic responses; bombarded regions exhibit reduced PMA, whereas adjacent regions maintain their PMA. Notably, regions with reduced PMA do not disrupt the distribution of perpendicular magnetic domains in neighboring PMA regions, even at widths as narrow as 500 nm, demonstrating the robustness of the PMA domain structure.},
urldate = {2025-11-20},
journal = {Journal of Magnetism and Magnetic Materials},
author = {Sebastiani-Tofano, Eugenia and Parente, Ana and Alcázar Ruano, Pedro L. and Abuín, Manuel and González-García, Álvaro and López-Sánchez, Jesús and Rubio-Zuazo, Juan and Silván, Miguel Manso and Mascaraque, Arantzazu and González Barrio, Miguel Ángel and Menghini, Mariela and Schuller, Ivan K. and C. Basaran, Ali and González, Elvira M. and Rodríguez de la Fuente, Oscar and Muñoz-Noval, Álvaro},
month = oct,
year = {2025},
pages = {173469},
file = {ScienceDirect Snapshot:E:\Usuarios\Administrator\Zotero\storage\SHZSLQQN\S0304885325007012.html:text/html},
}