Spin-Wave Correlator Using Acoustic Parametric Pumping

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current magneto-acoustic transducers, filters, sensors, and communication systems face challenges related to efficiency, frequency selectivity, tunability, and miniaturization, with limitations in conversion efficiency, frequency response, and sensitivity.

Innovation Solution

A magneto-acoustic spin-wave signal processing system that combines the benefits of spin waves and acoustic waves by using an acoustic wave transducer to produce surface acoustic waves in a magnetostrictive material, which parametrically amplifies spin waves, enhancing energy efficiency, miniaturization, and interference resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If conventional magneto-acoustic transducers are used, then basic signal processing is achieved, but conversion efficiency is limited

Engineering Contradiction:

Improveconversion efficiencyVSAvoidsignal processing efficiency

Core Design Contradiction:

Loss of energyVSProductivity

Solution Approach 1:

The patent combines spin wave devices and acoustic wave devices into a hybrid magneto-acoustic system. The acoustic wave transducer generates acoustic waves that parametrically pump and amplify spin waves, merging the low dispersion and high dynamic range of acoustic waves with the tunability and nonlinear effects of spin waves, thereby resolving the contradiction between conversion efficiency and signal processing efficiency.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent utilizes parametric pumping where acoustic waves at a specific frequency pump spin waves to achieve amplification. By changing the frequency and amplitude parameters of the acoustic waves, the system optimizes the conversion efficiency between acoustic and spin wave domains, overcoming the limited conversion efficiency of conventional transducers.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If conventional filters are used, then frequency selection is achieved, but precise frequency control and adaptability are limited

Engineering Contradiction:

Improvefrequency selectivity and tunabilityVSAvoidfrequency control complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements dynamically tunable frequency response by controlling the parameters of acoustic waves pumped into the magnetostrictive material. The system can adapt its frequency selectivity and response characteristics in real-time by adjusting the acoustic pumping parameters, providing precise frequency control and adaptability without increasing device complexity.

Inventive Principle:

Principle #15Dynamics

3Volume of moving object

If magneto-acoustic devices are miniaturized, then integration is improved, but sensitivity and performance may deteriorate

Engineering Contradiction:

Improvedevice sizeVSAvoidsensitivity

Core Design Contradiction:

Volume of moving objectVSMeasurement precision

Solution Approach 1:

The patent replaces conventional mechanical or electromagnetic transduction mechanisms with magneto-acoustic spin wave mechanisms. The spin wave correlator uses parametric pumping of spin waves in a magnetostrictive material, enabling miniaturized device architecture while maintaining high sensitivity through the quantum mechanical properties of spin waves and their coherent interaction with acoustic waves.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system achieves improved energy efficiency, miniaturization, and resistance to interference by leveraging the low dispersion and high dynamic range of acoustic waves coupled with the tunability and nonlinear effects provided by spin waves.

Implementation Method 1

the acoustic wave transducer is oriented such that the acoustic waves parametrically amplify the spin waves

Methodology Applied

Scientific EffectParametric pumping:

Implementation Method 2

These devices leverage the magnetostrictive effect, where magnetic materials undergo deformation in response to magnetic fields or induce changes in magnetization when subjected to mechanical stress

Methodology Applied

Scientific EffectMagnetostriction: Magnetostriction

Data Source

PatentUS20250194429A1Radio frequency signal correlator utilizing parametric pumping of spin waves

Publication Date: 2025.06.12 THE STATE OF OREGON ACTING BY & THROUGH THE OREGON STATE BOARD OF HIGHER EDUCATION ON BEHALF OF OREGON STATE UNIV

AI summary

Various embodiments of a magneto-acoustic spin-wave signal processing system are provided. In one embodiment, a system includes an acoustic wave transducer configured to produce surface acoustic waves in a plane of a magnetostrictive material, wherein the magnetostrictive material serves as a medium for spin waves traveling in the plane, and wherein the acoustic wave transducer is oriented such that the acoustic waves parametrically amplify the spin waves. In this way, signal processing systems achieve the benefits of both spin wave and acoustic wave devices, taking advantage of the low dispersion and high dynamic range of acoustic waves coupled with the tunability and nonlinear effects provided by spin waves.