L10-FeNi Alloy Doping for Coercivity and Magnetization
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Solution Overview
Problem
Current magnetic materials based on L10-FeNi ordered alloys face a trade-off between achieving high coercivity and saturation magnetization, making it difficult to control both properties simultaneously for effective use in magnet and magnetic recording materials.
Innovation Solution
The introduction of a light element doping process for L10-FeNi ordered alloy granular particles, specifically using boron, carbon, or nitrogen, to enhance coercivity and saturation magnetization, allowing for the attainment of coercivity of 87.5 kA/m or more and saturation magnetization of 1.0 T or more.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If L10-FeNi ordered alloy is used as magnetic material, then high saturation magnetization is achieved, but coercivity is insufficient
Solution Approach 1:
The patent applies parameter changes by introducing light element doping (B, C, or N) at controlled concentrations (0.01-5 at%) into the L10-FeNi ordered alloy. This doping modifies the electronic structure and magnetic anisotropy of the alloy, enabling simultaneous achievement of high coercivity (87.5 kA/m or more) and high saturation magnetization (1.0 T or more) that cannot be obtained by conventional undoped L10-FeNi alloys alone.
2Reliability
If conventional magnetic materials are used, then ease of manufacture is maintained, but performance (coercivity and saturation magnetization) is insufficient
Solution Approach 1:
The patent employs preliminary action by incorporating the light element doping step into the existing L10-FeNi alloy manufacturing process. The doping can be performed during alloy synthesis or through subsequent ion implantation/chemical vapor deposition, allowing the magnetic properties to be optimized before final product formation. This approach maintains manufacturing feasibility while achieving superior magnetic performance.
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 method effectively increases coercivity and saturation magnetization, enabling the L10-FeNi ordered alloy to be used effectively in magnet and magnetic recording materials while allowing for control over these properties.
Implementation Method 1
The introduction of a light element doping process for L10-FeNi ordered alloy granular particles, specifically using boron, carbon, or nitrogen, to enhance coercivity and saturation magnetization
Data Source
AI summary
An FeNi ordered alloy contained in a magnetic material has an L10 ordered structure, is doped with an light element, and is provided as a granular particle. A method for manufacturing a magnetic material including an FeNi ordered alloy having an L10 ordered structure includes preparing an FeNi ordered alloy provided as a granular particle, and doping a light element into the FeNi ordered alloy.