Three-dimensional complex-geometry ferromagnetic nanostructures in magnoncis and spintronics

Polish title: Trójwymiarowe nanostruktury ferromagnetyczne o złożonej geometrii w magnonice i spintronice

Grant

National Science Centre, Poland call PRELUDIUM-22
Project no. 2023/49/N/ST3/03032
Starting date: 23 I 2024
Finish date: 22 I 2026

Team

Principal Investigator (PI)
mgr Mateusz Gołębiewski

Supervisor
prof. dr hab. Maciej Krawczyk

Project description

Scientists are increasingly exploring new ways to perform logic operations, store data, and transmit information. Due to quantum effects and the dissipation of large amounts of heat, conventional electronic circuits will soon reach their physical limits, reducing their lifetime and efficiency. More efficient ways of data processing in the form of spin waves could solve modern micro- and nanotechnology obstacles. Effective manipulation, control, induction, and detection of these disturbances are the cornerstones of modern research pursuing their use in industry – a signal propagating without charge transfer and thus without thermal losses would be a technological milestone. This property, coupled with a wider range of available frequencies than in electronics and the ability to encode information in both amplitude and phase, makes spin waves a strong candidate as an information carrier in the next generation of magnonic devices.

Advanced research on modeling and numerical simulation of three-dimensional structures in Comsol Multiphysics software and collaboration with the world’s leading experimental groups in this field allow us to comprehensively analyze complex 3D systems such as gyroidal networks or diamond bond-like lattices. The selected nanostructures provide unique geometries to study intriguing physical phenomena with different underlying causes. Gyroids consist of chiral triple-junction nanowires, leading to chirality and translational symmetry-breaking effects. This leads to exciting properties such as an asymmetric dispersion relation for spin waves and direction dependent conductivity. Diamond bond-like lattices, in turn, exhibit tetrapod bonding of nanowires with non-trivial cross sections. Our research will focus on exploring the localization properties of spin waves within these junctions and, in analogy to gyroids, their impact on electrical conductivity. In addition, we will perform separate analyses of crescent-shaped nanowires, which are the fundamental building blocks of these structures.

In this project, we intend to conduct extensive research on the interactions of magnetization dynamics with the electric current flowing in these complex 3D structures, which is a very promising bridgehead for the study of phenomena such as anisotropic magnetoresistance or local and dynamic magnetization switching, which are desired in many studies of reservoir computing systems, among others. Systems combining electrical and magnonic interactions are of particular interest due to the search for devices that combine the currently dominant electric charge domain in CMOS systems with the potential of spin waves, and the concepts being developed for future spintronic and magnonic devices. A comprehensive exploration of these interactions in 3D systems through theoretical calculations and numerical simulations is thus the most general picture of our project plan. We will pay special attention to the modeling of magnetic systems, where non-trivial geometry and the use of the third spatial dimension can significantly increase the efficiency and likelihood of their application. Mastering and understanding the nature of magnetization dynamics, the binding of spin waves at edges, surfaces or in the volume of three-dimensional magnetic systems, will enable the study of new phenomena in magnetism physics as well as the creation of new functionalities in magnonic and spintronic devices. The study will also determine the properties of spin waves and electric current propagation directions with respect to the external magnetic field in 3D structures. The advantage and benefit of this research will be access and the possibility to interpret experimental measurements of these 3D ferromagnetic nanostructures, based on our theoretical analyses. Thus, all system parameters innumerical simulations will remain within technical feasibility.

The scientific project “Three-dimensional complex-geometry ferromagnetic nanostructures in magnonics and spintronics” aims to make a significant contribution to the physics of condensed matter in terms of its magnetic properties, spin waves and spin-charge coupling. Magnonic and spintronic media are currently dominated by planar systems, which limits their further miniaturization and development. In this project, we intend to extend this paradigm to the third spatial dimension, which is still at a very early stage of investigation.

Tasks

I Study of statics, dynamics and localization of spin waves in three-dimensional ferromagnetic gyroidal networks.

II Investigation of gyroid nanostructures as a medium for magnon-spintronic phenomena.

III Study of spin waves’ statics, dynamics, and localization properties in ferromagnetic diamond bond-like lattices and their building blocks.

IV Analysis of diamond structures and their crescent-shaped nanowires as part of a magnon-spintronic circuit.ma menu kontekstoweAkapitma menu kontekstowe

Publications

@article{doi:10.1021/acsami.4c02366,,

title = {Collective Spin-Wave Dynamics in Gyroid Ferromagnetic Nanostructures},

author = {Mateusz Gołębiewski and R Hertel and M d’Aquino and V I Vasyuchka and M Weiler and P Pirro and Maciej Krawczyk and S Fukami and H Ohno and J Llandro},

url = {https://doi.org/10.1021/acsami.4c02366},

doi = {10.1021/acsami.4c02366},

year  = {2024},

date = {2024-04-22},

urldate = {2024-04-22},

journal = {ACS Applied Materials & Interfaces},

volume = {0},

issue = {0},

pages = {0},

abstract = {Expanding upon the burgeoning discipline of magnonics, this research elucidates the intricate dynamics of spin waves (SWs) within three-dimensional nanoenvironments. It marks a shift from traditionally used planar systems to exploration of magnetization configurations and the resulting dynamics within 3D nanostructures. This study deploys micromagnetic simulations alongside ferromagnetic resonance measurements to scrutinize magnetic gyroids, periodic chiral configurations composed of chiral triple junctions with a period in nanoscale. Our findings uncover distinctive attributes intrinsic to the gyroid network, most notably the localization of collective SW excitations and the sensitivity of the gyroid’s ferromagnetic response to the orientation of the static magnetic field, a correlation closely tied to the crystallographic alignment of the structure. Furthermore, we show that for the ferromagnetic resonance, multidomain gyroid films can be treated as a magnonic material with effective magnetization scaled by its filling factor. The implications of our research carry the potential for practical uses such as an effective, metamaterial-like substitute for ferromagnetic parts and lay the groundwork for radio frequency filters. The growing areas of 3D magnonics and spintronics present exciting opportunities to investigate and utilize gyroid nanostructures for signal processing purposes.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}