Cylindrical Magnetic Memory Structure for SOT Data Writing
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Solution Overview
Problem
Magnetic memories face challenges in efficiently writing data due to difficulties in generating effective magnetic fields for data storage.
Innovation Solution
The magnetic memory design incorporates a configuration of cylindrical magnetic members with insulating layers and pole structures that utilize the Spin-Orbit-Torque effect to efficiently write data by reversing magnetization using controlled electric currents and assist magnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a magnetic field is generated by passing an electric current through a field line to write data into the magnetic member, then data writing is achieved, but the writing efficiency is poor
Solution Approach 1:
The patent replaces the conventional electromagnetic induction method (passing current through a field line) with the Spin-Orbit-Torque effect. A current is passed through a non-magnetic conductor adjacent to the magnetic member, utilizing spin-orbit coupling to generate spin transfer torque that directly reverses magnetization. This substitution of the physical mechanism enables efficient data writing with reduced power consumption and improved speed.
Solution Approach 2:
The patent changes the physical parameter used for magnetization reversal from electromagnetic field induction to spin transfer torque. By controlling the direction of current flow through the non-magnetic conductor, the magnetization direction of the magnetic member can be reversed efficiently. This parameter change enables direct manipulation of magnetic properties through electrical current, achieving high writing efficiency with low power consumption.
2Speed
If conventional magnetic memory structure is used, then basic data storage function is achieved, but writing speed is slow
Solution Approach 1:
The patent replaces the conventional electromagnetic induction method with the Spin-Orbit-Torque effect. A current is passed through a non-magnetic conductor adjacent to the magnetic member, utilizing spin-orbit coupling to generate spin transfer torque that directly reverses magnetization. This substitution of the physical mechanism enables efficient data writing with reduced power consumption and improved speed.
Solution Approach 2:
The patent divides the memory structure into distinct functional components: magnetic members for data storage, non-magnetic conductors for current passage and spin torque generation, and insulating layers for electrical isolation. This segmentation allows each component to be optimized for its specific function, achieving high writing speed while maintaining manageable structural complexity.
3Ease of manufacture
If magnetic wall shifting method is used, then data storage is achieved, but the method is difficult to implement efficiently
Solution Approach 1:
The patent replaces the conventional electromagnetic induction method (passing current through a field line) with the Spin-Orbit-Torque effect. A current is passed through a non-magnetic conductor adjacent to the magnetic member, utilizing spin-orbit coupling to generate spin transfer torque that directly reverses magnetization. This substitution of the physical mechanism enables efficient data writing with reduced power consumption and improved speed.
Solution Approach 2:
The patent introduces a non-magnetic conductor as an intermediary element between the electrical current source and the magnetic member. This intermediary carries the current and generates the spin transfer torque that acts on the magnetic member's magnetization. The insulating layer serves as another intermediary, providing electrical isolation while allowing magnetic interaction. These intermediary elements enable efficient and easy implementation of the data writing process.
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 data writing with reduced power consumption and increased speed by optimizing magnetization reversal through the SOT effect, minimizing capacitance and electrical resistance.
Implementation Method 1
The magnetic memory design incorporates a configuration of cylindrical magnetic members with insulating layers and pole structures that utilize the Spin-Orbit-Torque effect to efficiently write data by reversing magnetization using controlled electric currents and assist magnetic fields.
Data Source
AI summary
A memory includes first magnetic-members extending in a first direction and having a first and s second end portions. Second magnetic-members are provided corresponding to the first magnetic-members, and extend in the first direction from an inside of cylinders of the first magnetic-members on a side of the second end portions. Third magnetic-members are provided above the second magnetic-members corresponding to the first magnetic-members, and are electrically disconnected from the second magnetic-members. First wires extend in a second direction, are arranged in a third direction intersecting the first and the second directions, and are electrically connected to the third magnetic-members arranged in the second direction. A fourth magnetic-member is provided around the second end portions of the first magnetic-members, and is electrically disconnected from the second and third magnetic-members. Second wires are provided on a side of the first end portions of the first magnetic-members.