Magnetic Shield Base Lamination for High-Density Storage
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Solution Overview
Problem
Magnetic data storage devices face challenges in maintaining stability and accuracy due to increased susceptibility to magnetic noise and instability as data bit density rises, leading to reduced physical size of magnetic components which are prone to stray magnetic fields and Barkhausen noise.
Innovation Solution
A magnetic stack with a base lamination providing predetermined anisotropy and magnetic coercivity is used, along with ferromagnetic shields, to stabilize magnetizations and mitigate noise, employing tuned magnetic coupling and domain control structures to maintain shield stability and data signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data bit density is increased, then storage capacity is improved, but magnetic components become more susceptible to magnetic noise and instability
Solution Approach 1:
A base lamination is introduced as an intermediary layer between the magnetic shield and the magnetic stack. This base lamination provides predetermined anisotropy and magnetic coercivity to the magnetic shield, stabilizing it against stray magnetic fields and Barkhausen noise while allowing high data bit density storage.
2Volume of moving object
If physical size of magnetic components is reduced, then data bit density is improved, but susceptibility to stray magnetic fields increases
Solution Approach 1:
The magnetic coercivity and anisotropy parameters of the magnetic shield are modified by coupling it to a base lamination with predetermined properties. This allows the shield to maintain stability against stray magnetic fields even when its physical dimensions are reduced for high-density storage.
3Volume of moving object
If magnetic shield size is reduced, then data bit density is improved, but Barkhausen noise increases
Solution Approach 1:
The base lamination acts as a mediator that provides predetermined anisotropy and magnetic coercivity to the reduced-size magnetic shield. This stabilization suppresses Barkhausen noise generation in the shield while allowing it to maintain a small physical size for high-density data storage.
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 solution enhances the robustness and stability of magnetic shields, improving data sensing accuracy and efficiency by maintaining magnetizations and reducing noise-induced errors in high-density data storage environments.
Implementation Method 1
The magnetic shield can be positioned on top of a base lamination and have at least a predetermined anisotropy and magnetic coercivity corresponding to the base lamination
Implementation Method 2
The magnetic shield can be positioned on top of a base lamination and have at least a predetermined anisotropy and magnetic coercivity corresponding to the base lamination
Implementation Method 3
A magnetic stack may contact at least one magnetic shield. The magnetic shield can be positioned on top of a base lamination
Implementation Method 4
The tuned configuration of the base lamination that corresponds with optimized anisotropy and magnetic coercivity can mitigate magnetic domain wall movement and Barkhausen noise in the magnetic shield
Data Source
AI summary
A magnetic element may generally be configured as a read head with at least a magnetic stack that contacts at least one magnetic shield. The magnetic shield can be positioned on top of a base lamination and have at least a predetermined anisotropy and magnetic coercivity corresponding to the base lamination.