Data Transmission and Exchange Using Spin Waves
OwnerHaiwen Xi, Song Xue +2inventors
InventorsHaiwen Xi, Song Xue, Dexin Wang, Dimitar V. Dimitrov
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Abstract
Devices are proposed for use in nanoscale data transfer and exchange between electronic components. Spin wave generators translate an input signal charge-carrier based signal to spin waves within a ferromagnetic stripe. The spin waves propagate along the ferromagnetic stripe and are detected by spin wave detectors. Further, signal transfer devices such as a splitter, mixer, and switch are disclosed. Embodiments of the invention provide a solution for replacing copper connections, which is a limiting factor in current and future development of high-performance chips.
Claims29
A system for data transmission using spin waves comprising:
- a ferromagnetic (FM) stripe having a first magnetization direction and a stripe length;
- a spin wave generator coupled to the FM stripe at a first location along the stripe length, the spin wave generator configured to convert an input signal to a spin wave which propagates along the stripe length;
- and
- a spin wave detector coupled to the FM stripe at a second location along the stripe length such that the detector can detect the propagated spin wave and produce a corresponding output signal.
A system for interconnecting electronic components using spin waves as data carriers comprising:
- a ferromagnetic (FM) stripe having a first magnetization direction and a stripe length;
- a plurality of spin-momentum transfer (SMT) effect devices dispersed along the stripe length, each SMT effect device being coupled with one or more of the electronic components being connected, wherein at least one SMT effect device is a generating SMT effect device configured to generate spin waves within the magnetic stripe and at least one SMT effect device is a detecting SMT effect device configured to detect spin waves in the magnetic stripe, each SMT effect device including a stack of layers, the layers comprising:
- a pinned layer, having a junction magnetization direction that is different than the first magnetization direction;
- a portion of the FM stripe;
- and
- a nonmagnetic spacer layer between the portion of the FM stripe and the pinned layer.
A method of transmitting data between devices comprising the steps of:
- providing a ferromagnetic (FM) stripe having a first magnetization direction oriented along a length of the FM stripe;
- a plurality of spin-momentum transfer (SMT) effect devices dispersed along the length of the FM stripe, wherein at least one SMT effect device is a generating SMT effect device and is configured to generate spin waves in the FM stripe and at least one SMT effect device is a detecting SMT effect device and is configured to detect spin waves in the magnetic stripe, each SMT effect device including a stack of layers, the layers comprising:
- a pinned layer, having a magnetization direction fixed substantially perpendicular to the first magnetization direction of the stripe;
- a portion of the FM stripe;
- and a nonmagnetic spacer layer residing between the FM stripe and the pinned layer;
- injecting a current representative of a signal into the pinned layer of the at least one generating SMT effect device, thereby generating a spin wave in the FM stripe, the spin wave representative of the signal;
- detecting the spin wave, and thereby the signal, at the at least one detecting SMT effect device.
Dependencies are inferred from the claim text.