Transition from ferromagnetic to noncollinear to paramagnetic state with increasing Ru concentration in FeRu films

Autor(en)

Juliana Lisik, Manuel Rojas, Spencer Myrtle, Dominic H. Ryan, René Hübner, Pavlo Omelchenko, Claas Abert, Amil Ducevic, Dieter Suess, Ivan Soldatov, Rudolf Schaefer, Johannes Seyd, Manfred Albrecht, Erol Girt

Abstrakt

The structural and magnetic properties of sputter-deposited Fe100-xRux films were studied for x≤50. The crystal structure of Fe100-xRux is shown to be predominantly body-centered cubic for x<13 and to undergo a gradual transition to hexagonal close-packed in the Ru concentration range 13≲x≲20. Magnetic measurements indicate that the addition of Ru to Fe gives rise to a noncollinear magnetic alignment between Fe atoms in the body-centered cubic FeRu alloys, while the hexagonal close-packed FeRu alloys exhibit paramagnetic behavior. A simple atomistic model was used to show that the competition between ferromagnetic coupling of neighboring Fe atoms and antiferromagnetic coupling of Fe atoms across Ru atoms in cubic FeRu structures can induce noncollinear magnetic order. Magnetic multilayer structures used in thin-film magnetic devices make extensive use of both Fe and Ru layers. Our results reveal that the presence of even a small amount of Ru in Fe influences the magnetic order of Fe, which could impact the performance of these devices.

Organisation(en)

Physik Funktioneller Materialien

Externe Organisation(en)

Simon Fraser University, McGill University, Helmholtz-Zentrum Dresden-Rossendorf, Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Universität Augsburg

Journal

Physical Review B

Band

110

Anzahl der Seiten

14

ISSN

2469-9950

DOI

https://doi.org/10.1103/PhysRevB.110.104429

Publikationsdatum

09-2024

Peer-reviewed

Ja

ÖFOS 2012

103017 Magnetismus

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/25dcd18c-96ac-4785-af24-0a8b5919655a