Aggregated spin-torque nano-oscillators

Patent metadata

Field	Value
Publication number	US-9739851-B2
Application number	US-201314140878-A
Country	US
Kind code	B2
Filing date	Dec 26, 2013
Priority date	Sep 9, 2010
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A nano-oscillator magnetic wave propagation system has a group of aggregated spin-torque nano-oscillators (ASTNOs), which share a magnetic propagation material. Each of the group of ASTNOs is disposed about an emanating point in the magnetic propagation material. During a non-wave propagation state of the nano-oscillator magnetic wave propagation system, the magnetic propagation material receives a polarizing magnetic field. During a wave propagation state of the nano-oscillator magnetic wave propagation system, each of the group of ASTNOs initiates spin waves through the magnetic propagation material, such that a portion of the spin waves initiated from each of the group of ASTNOs combine to produce an aggregation of spin waves emanating from the emanating point. The aggregation of spin waves may provide a sharper wave front than wave fronts of the individual spin waves initiated from each of the group of ASTNOs.

First claim

What is claimed is:

1. A nano-oscillator magnetic wave propagation system comprising:
a first spin-wave detector;
a first plurality of point contacts; and
a first magnetic propagation material, wherein:
each of the first plurality of point contacts is on the first magnetic propagation material and is disposed about a first emanating point in the first magnetic propagation material;
during a first wave propagation state, each of the first plurality of point contacts and a corresponding portion of the first magnetic propagation material provide a corresponding one of a first plurality of aggregated spin-torque nano-oscillators (ASTNOs) configured to initiate spin waves through the first magnetic propagation material, such that a portion of the spin waves from each of the first plurality of ASTNOs combine to produce a first aggregation of spin waves emanating from the first emanating point;
the first spin-wave detector and the first plurality of ASTNOs share the first magnetic propagation material; and
during the first wave propagation state, the first spin-wave detector is adapted to receive a portion of the first aggregation of spin waves.

2. The nano-oscillator magnetic wave propagation system of claim 1 wherein:
the nano-oscillator magnetic wave propagation system is a spin-wave based communications system adapted to during the first wave propagation state, convey information from the first plurality of ASTNOs to the first spin-wave detector; and
the first aggregation of spin waves is a first aggregation of modulated spin waves, such that modulation of the first aggregation of modulated spin waves is based on the information.

3. The nano-oscillator magnetic wave propagation system of claim 1 wherein:
the nano-oscillator magnetic wave propagation system is a spin-wave based measurement system, which is adapted to measure effects of at least one physical entity upon the portion of the first aggregation of spin waves to provide measured effects; and
the measured effects are based on detection of the portion of the first aggregation of spin waves by the first spin-wave detector.

4. The nano-oscillator magnetic wave propagation system of claim 3 wherein the at least one physical entity is selected from a group consisting of radio frequency energy, light, vibration, sound waves, temperature, and radiation.

5. The nano-oscillator magnetic wave propagation system of claim 1 wherein:
the nano-oscillator magnetic wave propagation system is a spin-wave locking system;
the first spin-wave detector is a first spin-torque nano-oscillator (STNO); and
the first STNO is adapted to during the first wave propagation state:
initiate spin waves through the first magnetic propagation material; and
lock to the portion of the first aggregation of spin waves.

6. The nano-oscillator magnetic wave propagation system of claim 1 further comprising a first spin-wave wave-front detector wherein:
the nano-oscillator magnetic wave propagation system is a spin-wave wave-front based system; and
the first aggregation of spin waves has a first aggregated spin-wave wave-front.

7. The nano-oscillator magnetic wave propagation system of claim 6 further comprising a memristic device wherein:
the memristic device is adapted to operate in one of a high resistance state and a low resistance state; and
detection of the first aggregated spin-wave wave-front is based on the memristic device switching from the high resistance state to the low resistance state.

8. The nano-oscillator magnetic wave propagation system of claim 6 wherein the nano-oscillator magnetic wave propagation system is a spin-wave based polychronous wave propagation system, which is adapted to provide polychronous activity that is analogous to polychronous activity in a brain.

9. The nano-oscillator magnetic wave propagation system of claim 8 wherein operational behavior of the spin-wave based polychronous wave propagation system comprises at least one selected from a group consisting of arithmetical computations, memory storage, Boolean functions, and frequency-based computations.

10. A nano-oscillator magnetic wave propagation system comprising:
a first plurality of point contacts; and
a first magnetic propagation material, wherein:
each of the first plurality of point contacts is on the first magnetic propagation material and is disposed about a first emanating point in the first magnetic propagation material;
during a first wave propagation state, each of the first plurality of point contacts and a corresponding portion of the first magnetic propagation material provide a corresponding one of a first plurality of aggregated spin-torque nano-oscillators (ASTNOs) configured to initiate spin waves through the first magnetic propagation material, such that a portion of the spin waves from each of the first plurality of ASTNOs combine to produce a first aggregation of spin waves emanating from the first emanating point;
during the first wave propagation state, each of the first plurality of ASTNOs is further adapted to about simultaneously initiate the spin waves though the first magnetic propagation material;
the spin waves from each of the first plurality of ASTNOs have a corresponding spin-wave wave-front with a corresponding wave-front amplitude; and
the first aggregation of spin waves has a first aggregated spin-wave wave-front with a first aggregated wave-front amplitude, which is greater than each corresponding wave-front amplitude.

11. The nano-oscillator magnetic wave propagation system of claim 10 wherein:
a portion of the spin waves from each of the first plurality of ASTNOs combine to produce a plurality of partially aggregated spin waves, such that each of the plurality of partially aggregated spin waves has a corresponding partially aggregated spin-wave wave-front with a corresponding partially aggregated wave-front amplitude; and
the first aggregated wave-front amplitude is greater than each corresponding partially aggregated wave-front amplitude.

12. The nano-oscillator magnetic wave propagation system of claim 11 wherein:
the first aggregated spin-wave wave-front is detected;
none of the corresponding spin-wave wave-fronts are detected; and
none of the corresponding partially aggregated spin-wave wave-fronts are detected.

13. The nano-oscillator magnetic wave propagation system of claim 1 wherein each of the first plurality of point contacts is about equidistantly located from the first emanating point in the first magnetic propagation material, such that the first emanating point is a first centroid.

14. The nano-oscillator magnetic wave propagation system of claim 1 wherein the first magnetic propagation material is bulk material, such that the first aggregation of spin waves propagates in three dimensions.

15. The nano-oscillator magnetic wave propagation system of claim 1 wherein the first magnetic propagation material is planar material having a first planar surface and a second planar surface, which is about parallel to and opposite from the first planar surface, such that the first aggregation of spin waves propagate predominantly in two dimensions.

16. The nano-oscillator magnetic wave propagation system of claim 1 further comprising a second plurality of point contacts on the first magnetic propagation material, such that:
each of the second plurality of point contacts is disposed about a second emanating point in the first magnetic propagation material; and
during the first wave propagation state, each of the second plurality of point contacts and a corresponding portion of the first ma

Assignees

• Univ New York
• New York Univeristy

Inventors

• Hoppensteadt Frank C
• Kent Andrew D
• Macià Bros Ferran

Classifications

• H03B15/006

  using spin transfer effects or giant magnetoresistance · CPC title

• H03B9/10

  using a magnetron · CPC title

• G01R33/1284 Primary

  Spin resolved measurements; Influencing spins during measurements, e.g. in spintronics devices · CPC title

• G01R33/06

  using galvano-magnetic devices · CPC title

• B82Y25/00

  Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance · CPC title