FeIr Alloy Magnetic Element for Stable Memory Anisotropy Control
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Solution Overview
Problem
Existing magnetic elements in magnetic memory devices and sensors face challenges in achieving stable operational performance due to limitations in controlling magnetic anisotropy.
Innovation Solution
A magnetic element comprising a first layer with a FeIr alloy and a nonmagnetic second layer, such as magnesium oxide, where the second layer is positioned between the first layer and a ferromagnetic third layer, allowing for controlled magnetic anisotropy through voltage application, thereby enhancing operational stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional magnetic elements are used, then the device structure is simple, but the operational stability is insufficient due to limitations in controlling magnetic anisotropy
Solution Approach 1:
The patent employs composite material structures including FeIr alloy layers combined with nonmagnetic layers (such as magnesium oxide) to achieve high interface magnetic anisotropy. This composite approach enables stable magnetic properties and reliable operation while managing the increased structural complexity through systematic material integration.
Solution Approach 2:
The invention introduces specific material compositions at interfaces (FeIr alloy with nonmagnetic layers) to locally enhance magnetic anisotropy properties. This localized quality improvement at critical interfaces provides the necessary operational stability without requiring complete restructuring of the entire device.
2Reliability
If voltage-controlled magnetization reversal is implemented, then the operational stability is improved, but the device complexity increases
Solution Approach 1:
The patent utilizes voltage application to dynamically change magnetic anisotropy parameters, enabling controlled magnetization reversal. This parameter control mechanism improves operational stability by allowing precise manipulation of magnetic states through electrical fields, managing complexity through field-based control rather than mechanical means.
3Manufacturing precision
If FeIr alloy with nonmagnetic layer is used, then interface magnetic anisotropy is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent specifies precise compositional parameters for FeIr alloys and controlled thicknesses for nonmagnetic layers to achieve desired interface magnetic anisotropy. These parameter specifications enable manufacturing precision while providing clear fabrication guidelines that manage process complexity through defined material and dimensional parameters.
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
The configuration improves the operational stability of magnetic elements, memory devices, and sensors by achieving high interface magnetic anisotropy and allowing for effective voltage-controlled magnetization reversal, leading to enhanced performance and scalability in magnetic memory applications.
Implementation Method 1
Stable operations are obtained by appropriately controlling the magnetic anisotropy of a magnetic element used in a magnetic memory device, a magnetic sensor, etc.
Implementation Method 2
allowing for controlled magnetic anisotropy through voltage application, thereby enhancing operational stability
Data Source
AI summary
According to one embodiment, a magnetic element includes a first layer and a second layer. The first layer includes a first element and a second element. The first element includes at least one selected from the group consisting of Fe, Co, and Ni. The second element includes at least one selected from the group consisting of Ir and Os. The second layer is nonmagnetic.