Spin Wave Generator Using Magnetostrictive Film and Acoustic Resonator
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Solution Overview
Problem
The miniaturization of conventional CMOS transistors is becoming increasingly challenging due to power dissipation issues and quantum mechanical effects, which hinder further scaling and performance improvement, necessitating alternative device structures that can efficiently generate and detect spin waves for advanced computational architectures.
Innovation Solution
A device comprising a magnetostrictive film and a deformation film mechanically coupled with acoustic isolation, where changes in physical dimensions of the deformation film induce mechanical stress in the magnetostrictive film, altering its magnetization to generate or detect spin waves, forming an acoustic resonator for enhanced efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional CMOS transistors are miniaturized to increase processing power, then transistor density improves, but power dissipation increases and quantum mechanical effects cause leakage currents
Solution Approach 1:
The patent replaces charge-based electronic systems with spin-based magnetic systems. Instead of moving charge carriers (electrons/holes) through CMOS transistors, the invention uses spin waves (magnons) in ferromagnetic materials to carry and process information. This substitution eliminates the need for charge movement, thereby eliminating resistive heating and power dissipation associated with conventional electronics, while enabling continued scaling to nanometer dimensions without quantum leakage effects.
Solution Approach 2:
The invention changes the fundamental operating parameter from electrical charge to magnetic spin. By using the spin degree of freedom instead of charge, the system operates in a regime where power dissipation is dramatically reduced. The spin wave frequency and wavelength can be tuned by adjusting magnetic field parameters and material properties, enabling scalable device design at nanometer dimensions without suffering from quantum mechanical leakage that plagues charge-based devices at similar scales.
2Loss of energy
If spin wave-based devices are used to replace charge-based circuits, then thermal dissipation is reduced, but efficient generation and detection of spin waves becomes crucial
Solution Approach 1:
The patent introduces piezoelectric materials as intermediary components that couple mechanical stress to magnetic spin waves through the magnetostrictive effect. The piezoelectric layer converts electrical signals into mechanical vibrations, which then generate spin waves in the adjacent ferromagnetic layer. This intermediary mechanism provides an efficient and controllable method to generate and detect spin waves, solving the challenge of converting between electrical and magnetic domains while maintaining low power dissipation.
Solution Approach 2:
The invention utilizes mechanical vibration at specific frequencies to generate spin waves. By applying alternating mechanical stress (through piezoelectric actuators or acoustic waves) at the resonant frequency of the ferromagnetic layer, efficient spin wave generation is achieved. The mechanical vibration directly modulates the magnetization, creating spin waves with high efficiency and enabling sensitive detection through the inverse magnetostrictive effect.
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
This configuration allows for efficient generation and detection of spin waves, overcoming the limitations of traditional charge-based devices by leveraging wave properties and reducing thermal dissipation, making it suitable for nanometer-scale applications.
Implementation Method 1
the deformation film is configured to undergo a change physical dimensions in response to an actuation, where the change in the physical dimensions of the deformation film induces a mechanical stress in the magnetostrictive film to cause a change in the magnetization of the magnetostrictive film
Implementation Method 2
the magnetostrictive film is configured to undergo to a change in physical dimensions in response to a change in magnetization, wherein the change in the physical dimensions of the magnetostrictive film induces a mechanical stress in the deformation film to cause generation of electrical power by the deformation film
Implementation Method 3
an acoustic isolation surrounding the magnetostrictive film and the deformation film to form an acoustic resonator
Data Source
AI summary
The disclosed technology generally relates to semiconductor devices, and more particularly to a device configured as one or both of a spin wave generator or a spin wave detector. In one aspect, the device includes a magnetostrictive film and a deformation film physically connected to the magnetorestrictive film. The device also includes an acoustic isolation surrounding the magnetostrictive film and the deformation film to form an acoustic resonator. When the device is configured as the spin wave generator, the deformation film is configured to undergo a change physical dimensions in response to an actuation, where the change in the physical dimensions of the deformation film induces a mechanical stress in the magnetostrictive film to cause a change in the magnetization of the magnetostrictive film. When the device is configured as the spin wave detector, the magnetostrictive film is configured to undergo to a change in physical dimensions in response to a change in magnetization, wherein the change in the physical dimensions of the magnetostrictive film induces a mechanical stress in the deformation film to cause generation of electrical power by the deformation film.