Magnetic Head Multilayer Pole Structure for Thermoelectric Stability
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Solution Overview
Problem
Existing magnetic heads face challenges in improving recording characteristics, particularly in maintaining stable and efficient recording operations with high density and reliability, due to thermal and power consumption issues.
Innovation Solution
A magnetic head design with a conductive element part between magnetic poles, utilizing a temperature difference induced by a current supply to reduce power consumption and stabilize the element part, enabling efficient recording operations through thermoelectric effects and alternating magnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional magnetic head design is used, then the structure is simple, but the recording characteristics and reliability are insufficient
Solution Approach 1:
The magnetic head is divided into multiple functional layers including a substrate, underlayer, magnetic pole pieces (first and second), and element part. Each layer has specific functions: the substrate provides structural support, the underlayer provides a non-magnetic base, the magnetic pole pieces generate and control magnetic fields for recording, and the element part detects magnetic signals. This segmentation allows optimization of each component for its specific function, improving overall reliability while managing complexity through modular design.
Solution Approach 2:
The magnetic head employs composite material structures including soft magnetic materials for pole pieces, non-magnetic materials for underlayers and intermediate layers, and protective coatings. The combination of different materials with complementary properties (magnetic permeability, coercivity, thermal stability) enhances recording characteristics and reliability without requiring overly complex single-material solutions.
2Quantity of substance
If high recording density is pursued, then recording capacity increases, but thermal deterioration and power consumption increase
Solution Approach 1:
The magnetic head design incorporates localized magnetic pole pieces with specific geometries and material properties optimized for high-density recording in critical areas. The first and second magnetic pole pieces have different configurations tailored to their specific functions in the recording process, allowing efficient magnetic field generation at the recording interface while minimizing overall power consumption.
Solution Approach 2:
The invention optimizes recording performance by carefully controlling material parameters such as coercivity, magnetic permeability, and layer thicknesses. The element part and magnetic pole pieces are designed with specific parameter ranges that enable high-density recording while maintaining acceptable power consumption levels through precise material selection and structural optimization.
3Quantity of substance
If high recording density is pursued, then recording capacity increases, but thermal stability deteriorates
Solution Approach 1:
Non-magnetic intermediate layers are introduced between the magnetic pole pieces and the element part, and between different functional layers. These intermediary layers serve as thermal barriers and magnetic field shields, reducing thermal transfer to sensitive components while maintaining magnetic recording functionality. This allows higher recording densities without compromising thermal stability of the head structure.
Solution Approach 2:
The head structure uses composite material layers with different thermal and magnetic properties. Non-magnetic materials with low thermal conductivity are strategically placed to create thermal isolation zones, while magnetic materials are optimized for their specific functions. This composite approach enables high-density recording by decoupling thermal management from magnetic performance requirements.
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 achieves stable recording operations with reduced power consumption, suppressing thermal deterioration and enhancing recording density and reliability by leveraging thermoelectric potential differences.
Implementation Method 1
A first magnetic pole temperature of the first magnetic pole in a first state is higher than a second magnetic pole temperature of the second magnetic pole in the first state... leveraging thermoelectric potential differences
Implementation Method 2
enabling efficient recording operations through thermoelectric effects and alternating magnetic fields
Data Source
AI summary
According to one embodiment, a magnetic head includes first and second magnetic poles, a conductive part, an element part, and first to fourth terminals. The conductive part is electrically insulated from the first and second magnetic poles. The first and second terminals are electrically connected to the conductive part. The element part is provided between the first and second magnetic poles and electrically connected to the first and second magnetic poles. The element part is conductive. The third terminal is electrically connected to the first magnetic pole. The fourth terminal is electrically connected to the second magnetic pole. A first magnetic pole temperature in a first state is higher than a second magnetic pole temperature of the second magnetic pole in the first state. A first current is supplied between the first and second terminals in the first state.