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Dynamic Control of Spin Sates in Interacting Magnetic Elements

DOE Grant Recipients

Argonne National Laboratory

Contact GRANT About This Technology

Technology Marketing Summary

U.S. patent 8,885,871 issued on an invention from Argonne National Laboratory (ANL) entitled, "Dynamic Control of Spin Sates in Interacting Magnetic Elements “, which describes a novel technique for controlling very small magnetic elements that form a complicated interacting magnetic device.  The use of the technique is limitless, but it is anticipated that this technique will used in magnonic crystals, nano-oscillators, filters, and potentially magnetic memory or other logic devices.  (DOE Case S-131,458).  (Mike Dobbs, Chicago Office, 630-252-2164)

Description

A method for the control of the magnetic states of interacting magnetic elements comprising providing a magnetic structure with a plurality of interacting magnetic elements.  The magnetic structure comprises a plurality of resonance frequencies depending on the state of the magnetic elements, amongst other factors, for example temperature, material, and external magnetic fields.  The active resonance frequency of the magnetic elements is determined.  The plurality of magnetic elements are then driven to a chaotic state of continuous magnetic state reversals by exposing one or more of the magnetic elements to an alternating magnetic field or electrical current at the determined active resonance frequency.  The plurality of magnetic elements in a chaotic state are then returned to a natural magnetic state.  Preferably, the entirety of the step of determining the active resonance frequency of the provided magnetic structure, the step of driving the plurality of magnetic elements to a chaotic state, and the step of returning the plurality of magnetic elements in a chaotic state to a natural state is repeated until each magnetic element is in its desired state.

Benefits

New Magnetic Field

Powerful Magnetets

 

Applications and Industries

Magnonic crystals

Nano-oscillators,

Filters

Magnetic memory

Magnetic Logic Devices

Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Patent 8,854,871
Patent
8,854,871
Dynamic control of spin states in interacting magnetic elements
A method for the control of the magnetic states of interacting magnetic elements comprising providing a magnetic structure with a plurality of interacting magnetic elements. The magnetic structure comprises a plurality of magnetic states based on the state of each interacting magnetic element. The desired magnetic state of the magnetic structure is determined. The active resonance frequency and amplitude curve of the desired magnetic state is determined. Each magnetic element of the magnetic structure is then subjected to an alternating magnetic field or electrical current having a frequency and amplitude below the active resonance frequency and amplitude curve of said desired magnetic state and above the active resonance frequency and amplitude curve of the current state of the magnetic structure until the magnetic state of the magnetic structure is at the desired magnetic state.
10/07/2014
Issued
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
S-131,458PrototypeAvailable10/30/201410/30/2014

Contact GRANT About This Technology

To: Michael J. Dobbs<Mike.Dobbs@ch.doe.gov>