Flexible spintronic & magnetoelastic systems

Parametric Spin–Phonon Coupling in Thin-Film Cantilevers

Enertark Research explores the interaction between mechanical resonance, magnetic order and spintronic damping mechanisms in flexible thin-film systems based on Metglas substrates.

Magnetoelastic coupling Spin–orbit torque (Pt/FeCoB) Gilbert damping α(t) Mechanical eigenmodes

Cantilever Layer Stack

Schematic layer stack of a flexible, spintronically active thin-film cantilever.

Au (contacts & track)

200–300 nm, patterned

Al₂O₃ (top insulator)

30–50 nm, vias

Pt (spin–orbit layer)

6–8 nm, blanket

FeCoB (FM, low damping)

8–12 nm, blanket

Al₂O₃ (bottom insulator)

30–70 nm, blanket

Metglas (substrate)

20–30 µm, flexible

Vias connect Au selectively to the Pt layer, enabling localized and controlled spin–orbit torque currents, while Metglas provides magnetoelastic mechanical coupling but remains electrically isolated.

Research Focus

Enertark Research is dedicated to fundamental studies of flexible, multiply coupled thin-film systems. At the core is a Metglas-based cantilever that combines mechanical resonance, magnetoelastic coupling and spintronic damping modulation α(t) in a single device.

The goal is to understand the dynamics of a system in which mechanical stress σ(t), magnetic excitation H(t) and Gilbert damping α(t) act as time-dependent, partially non-commutative control parameters.

Key Topics

Magnetoelastic coupling in thin ferromagnetic films.
Spin–orbit torque induced modulation of effective damping.
Resonance behaviour of flexible cantilevers with spintronic layers.
Spin pumping and energy redistribution between spin, phonon and magnetic channels.
Parametric excitation via H(t), σ(t), α(t) and potential non-commutative effects.

Methodological Approach

Design and CAD layout of a spintronically active cantilever with defined conductor pattern.
Fabrication in collaboration with cleanroom and thin-film facilities.
Characterization via FMR, MOKE, resonance analysis and transport-based measurements.
Theoretical modelling and numerical simulation of the coupled dynamics.

Scientific Questions

Spintronics Magnetoelasticity Nonlinear dynamics Multiphysics

The system allows systematic investigation of several current topics at the intersection of spintronics, magnetism and materials science.

How does time-dependent modulation of α(t) affect magnetization dynamics in a mechanically resonant system?
What coupling strengths are achievable between mechanical eigenmodes and ferromagnetic resonance?
Under which conditions do parametric amplification or nonlinear effects emerge?
How do spin-pumping signals behave in the presence of dynamically controlled damping?
Can non-commutative parameter cycles in the space (H(t), σ(t), α(t)) be observed experimentally?

Collaboration Opportunities

There are multiple entry points for collaboration with universities, Fraunhofer institutes and research laboratories, especially in:

Thin-film deposition (sputtering, ALD, lithography, RIE).
Magnetic characterization (FMR, MOKE, VSM).
Mechanical and resonance characterization of flexible structures.
Theoretical modelling and simulation of parametrically driven spin systems.

The initiative is explicitly focused on fundamental research. Commercial applications are not part of the collaboration scope and can be handled separately if desired.

Contact

If you are interested in scientific collaboration, joint measurement campaigns or theoretical work on parametrically driven spin–phonon systems, we are happy to discuss possible interactions.

Enertark Research – Spintronics & Magnetoelastic Initiative

E-mail: research@enertark.de

Location (research base): Germany

Enertark Research is an independent research project based in Germany. Certain organizational and technical aspects are supported in cooperation with QuantumRift Labs Inc. (Halifax, NS, Canada). The scientific direction and project leadership lie entirely with Enertark Research.

Research Collaboration Framework

This page describes an early-stage exploratory research project focused on spintronics, magnetism and magnetoelastic thin-film systems. The focus is exclusively on fundamental mechanisms such as spin–phonon coupling, Gilbert damping modulation and resonant thin-film dynamics. No commercial devices, products or energy systems are implied or described here.

Enertark Research conducts the scientific work from Germany. Certain organizational and technical aspects are supported in collaboration with QuantumRift Labs Inc. (Halifax, NS, Canada). The scientific agenda and research objectives are fully defined by Enertark Research.

This platform is intended solely for academic communication and the initiation of scientific collaboration.