Magnetic Element Concentration Regions Domain Wall Stability
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Solution Overview
Problem
Magnetic memory devices face challenges in achieving stable operational performance due to the instability of domain walls, which affects the density and alignment of magnetizations in magnetic elements.
Innovation Solution
A magnetic element design with multiple concentration regions and a magnetic portion where the concentration of specific elements like Au, Ir, Al, Ta, W, Hf, Pt, and Pd is strategically arranged to enhance the alignment of magnetizations and improve domain wall stability, utilizing a layered structure and specific material combinations to control the spin Hall effect and Dzyaloshinskii-Moriya Interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If domain walls are used in magnetic elements, then magnetic memory functionality is achieved, but operational stability deteriorates due to domain wall instability
Solution Approach 1:
The patent applies local quality by creating concentration regions with specific elements (Au, Ir, Al, Ta, W, Hf, Pt, Pd) at particular locations within the magnetic element. These localized compositional variations modify the magnetic properties and domain wall behavior in specific regions, thereby stabilizing domain walls while maintaining overall magnetic memory functionality.
Solution Approach 2:
The patent employs composite materials by combining multiple elements (Au, Ir, Al, Ta, W, Hf, Pt, Pd) with the base magnetic material to form a composite structure. This composite approach leverages the unique properties of each element to enhance domain wall stability and operational reliability of the magnetic element.
2Reliability
If domain wall stability is improved through material composition, then operational stability is enhanced, but device complexity increases due to multiple concentration regions
Solution Approach 1:
The patent applies segmentation by dividing the magnetic element into multiple concentration regions, each with specific elemental compositions. This segmentation allows independent optimization of different regions to control domain wall behavior, achieving stability enhancement through a structured approach that manages complexity systematically.
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 design improves the operational stability and controllability of domain walls, leading to enhanced magnetic memory device performance by optimizing the alignment and movement of domain walls, thereby increasing the density and stability of magnetizations.
Implementation Method 1
utilizing a layered structure and specific material combinations to control the spin Hall effect
Implementation Method 2
utilizing a layered structure and specific material combinations to control the spin Hall effect and Dzyaloshinskii-Moriya Interaction
Data Source
AI summary
According to one embodiment, a magnetic element includes a first member and a first magnetic portion. The first member includes a first region, a second region, and a third region positioned between the first region and the second region in a first direction. The first region includes at least one first element selected from the group consisting of Au, Ir, Al, Ta, TaN, W, Hf, Pt, and Pd. The second region includes at least one second element selected from the group. The third region includes at least one third element selected from the group. A concentration of the third element in the third region is lower than a concentration of the first element in the first region and lower than a concentration of the second element in the second region. A direction from the first region toward the first magnetic portion is aligned with a second direction.