Magnetic Head Stacked Body Layer Thickness Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current magnetic recording technologies face challenges in enhancing recording density in magnetic heads and devices due to limitations in the design and materials used in magnetic layers and non-magnetic layers, which affect the generation of magnetic fields and oscillation strength.
Innovation Solution
A magnetic head design incorporating a stacked body with specific magnetic and non-magnetic layers, including a first magnetic layer with Fe, Co, or Ni, and a second magnetic layer with Cr, V, Mn, or Sc, where the thickness ratio of these layers optimizes oscillation strength and recording density, and an electric circuit supplies current to enhance magnetic field generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional magnetic layer designs are used, then device simplicity is maintained, but recording density and oscillation strength are insufficient
Solution Approach 1:
The magnetic head employs a segmented stacked body structure comprising multiple magnetic layers (first magnetic layer, second magnetic layer, third magnetic layer) and non-magnetic layers (first non-magnetic layer, second non-magnetic layer, third non-magnetic layer) arranged in sequence. Each layer has specific thickness ratios (first magnetic layer thickness ≥ 0.25× second magnetic layer thickness, second magnetic layer thickness ≥ 0.25× third magnetic layer thickness) to optimize magnetic field generation and oscillation strength for high-density recording
Solution Approach 2:
The invention uses composite material composition in the magnetic layers, where the first magnetic layer contains Fe-Co-B alloy, the second magnetic layer contains CoFeB alloy, and the third magnetic layer contains CoFe alloy. These composite materials with specific elemental compositions and thickness ratios work together to enhance oscillation strength and achieve high recording density while maintaining manufacturability
2Strength
If magnetic layer thickness is increased to improve oscillation strength, then magnetic field generation is enhanced, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The invention optimizes oscillation strength by precisely controlling the thickness parameters of each magnetic layer relative to its adjacent non-magnetic layers. The first magnetic layer thickness is set to ≥ 0.25× the thickness of the second magnetic layer, the second magnetic layer thickness is set to ≥ 0.25× the thickness of the third magnetic layer, and the third non-magnetic layer thickness is set to ≥ 0.25× the thickness of the first magnetic layer. These parameter relationships ensure strong oscillation without excessive thickness that would complicate manufacturing
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 design improves oscillation strength and recording density by optimizing the thickness ratio of magnetic layers and supplying current, enabling stable and high-intensity magnetic field generation for improved magnetic recording capabilities.
Implementation Method 1
an oscillation generation unit which generates oscillation; a magnetic field generation unit which generates a magnetic field in accordance with the oscillation generated by the oscillation generation unit
Implementation Method 2
a first magnetic pole unit, a second magnetic pole unit, and a stacked body provided between the first magnetic pole unit and the second magnetic pole unit
Data Source
AI summary
According to one embodiment, a magnetic recording head includes a first magnetic pole, a second magnetic pole, and a stacked body provided between the first magnetic pole and the second magnetic pole. The stacked body includes a first magnetic layer, a second magnetic layer provided between the first magnetic layer and the second magnetic pole, a first non-magnetic layer provided between the first magnetic layer and the second magnetic layer, a second non-magnetic layer provided between the second magnetic layer and the second magnetic pole, and a third non-magnetic layer provided between the first magnetic pole and the first magnetic layer. The first magnetic layer includes a first element including at least one of Fe, Co, or Ni. The second magnetic layer includes the first element, and a second element including at least one selected from the group consisting of Cr, V, Mn, Ti, and Sc.