Ferromagnetic Resonance and AC Susceptibility Instrumentation for Probing the Magnetic Dynamics
Abstract
We propose a system of broadband ferromagnetic resonance and AC magnetic susceptibility to quantify the dynamical parameters of new magnetic materials designed for quantum sensing and logic devices. Dynamical parameters (e.g. the resonance frequency, damping factor, and spin diffusion rate) determine the response of spin waves to external electromagnetic fi eld. Having a quantitative knowledge of such parameters is necessary for purpose-designed device applications. The PI s research program is focused on the chemical design of chiral magnets and skyrmion materials with nanosecond dynamics. Such materials will be the centerpiece of the next-generation high-frequency low-power memory, magnetic logic, and auto-oscillator devices, once the resonant excitations are fully understood. Crucially, the proposed system has a quick turnaround for materials characterizations, enabling the PI to adjust the synthesis conditions and improve the sample quality via a design-synthesis-characterization feedback loop. The system will also be used by other DoD-funded PIs at Boston College who are working on single crystal, polycrystalline, and thin film samples of magnetic and superconducting materials. By bringing together the students from different labs, this instrument will automatically create a cross-disciplinary environment for training future scientists at the intersection of material synthesis and device engineering. Dynamical parameters provide crucial input for realistic calculations of magnetic interactions in quantum materials. Thus, the proposed system will also bene fit theoretical researchers at BC and fosters collaborations between the theoretical and experimental PhD students.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 29, 2024
- Source ID
- FA95502310124
Entities
People
- Fazel Tafti
Organizations
- Air Force Office of Scientific Research
- Boston College
- United States Air Force