Skyrmion Spin Memory Encryption via Reversible Spin Reorientation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current systems lack methods for encrypting and decrypting information stored in magnetic skyrmions, which are promising for data-storage and computing due to their stability but require efficient encryption techniques.
Innovation Solution
The implementation of a topological spin memory effect in magnetic thin films using a multilayer film with a control layer and a skyrmion layer, where the control layer affects the skyrmion layer to change its spin texture from a recognizable state to an encrypted state and back, leveraging temperature or other external stimuli for encryption and decryption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If skyrmions are used for data storage, then storage stability is improved, but encryption capability is lacking
Solution Approach 1:
The patent applies parameter changes by utilizing temperature as a control parameter to induce spin reorientation transitions. By changing the temperature, the magnetic anisotropy of the skyrmion layer is modified, transforming the skyrmion spin texture from an out-of-plane configuration to an in-plane configuration, thereby encrypting the stored data while maintaining storage stability
Solution Approach 2:
The patent achieves multi-functionality by enabling the skyrmion-based storage system to perform both data storage and encryption functions. The same skyrmion structure serves as the storage medium, while temperature-controlled spin reorientation provides the encryption mechanism, eliminating the need for separate encryption hardware
2Reliability
If spin reorientation is activated to encrypt data, then encryption security is improved, but detection difficulty increases
Solution Approach 1:
The patent employs periodic action through reversible temperature cycling. The system alternates between encryption states (in-plane spin configuration at low temperature) and decryption states (out-of-plane spin configuration at high temperature) by periodically changing the temperature, allowing secure data storage and controlled retrieval
Solution Approach 2:
The patent uses temperature as an intermediary parameter to control the spin reorientation transition. Temperature acts as a mediator that indirectly controls the magnetic anisotropy and spin texture configuration, enabling encryption without direct manipulation of the skyrmion structure
3Duration of action of stationary object
If topological spin memory effect is used, then non-volatile storage is improved, but device complexity increases
Solution Approach 1:
The patent applies self-service through the topological protection of skyrmions. The skyrmion structures inherently maintain their spin configuration without requiring external energy input or active maintenance, providing stable non-volatile storage. The system uses its own topological properties to preserve data integrity automatically
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 method enables secure, non-volatile information storage and retrieval by obscuring and recovering magnetic skyrmions, preserving the memory of their chirality and topological charge, facilitating secure data storage and potential applications in spintronic devices.
Implementation Method 1
a control layer; and a skyrmion layer comprising a plurality of skyrmions that store data that is configurable to be encrypted and decrypted responsive to the control layer being affected by a control parameter
Implementation Method 2
encrypting the data by activating a control parameter to enable a spin reorientation or to distort the plurality of skyrmions
Data Source
AI summary
A topological spin memory effect, defined as the recovery of magnetic skyrmions or magnetic bubble skyrmions in magnetic thin films after a transition to a dramatically different spin texture, is used for encrypted non-volatile information storage. The storage strategy is based on magnetic skyrmions, that is, topologically protected spin textures comprising chiral domain walls surrounding small (e.g., nanometers to microns in diameter), typically circular, single-domain cores. Systems and methods are described for encrypted non-volatile information storage based on a spin memory effect in magnetic thin films that support skyrmions. Systems and methods encrypt and recover information stored in the form of magnetic skyrmions.