Magnetic Recording Device With Voltage-Controlled Element Resistance
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Solution Overview
Problem
Current magnetic recording devices face challenges in enhancing recording density due to limitations in the magnetic head's ability to generate stable alternating magnetic fields effectively.
Innovation Solution
The magnetic recording device incorporates a magnetic head with a controller that supplies a recording current to a coil while applying an element voltage between terminals, creating a differential resistance peak and generating signals with specific intensity ratios, which stabilizes the alternating magnetic field and improves recording density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional magnetic head design is used, then device complexity is maintained at acceptable levels, but recording density cannot be improved
Solution Approach 1:
The magnetic head incorporates a magnetic element that generates alternating magnetic fields dynamically rather than using static pole structures. This dynamic approach enables higher recording density by creating time-varying magnetic fields that can write finer magnetic transitions on the recording medium, while the complexity is managed through integrated circuit control of the magnetic element.
Solution Approach 2:
The invention changes the operating parameters of the magnetic head by applying specific voltage ranges (first voltage to second voltage) to the magnetic element. This parameter control optimizes the magnetic field generation characteristics, enabling improved recording density through precise manipulation of the magnetic field strength and frequency without requiring complex mechanical structures.
2Stability of the object's composition
If element voltage is applied to stabilize alternating magnetic field, then magnetic field stability is improved, but energy consumption increases
Solution Approach 1:
The magnetic element is operated within a specific voltage range (between first voltage and second voltage) rather than continuously increasing voltage. This partial action approach provides sufficient magnetic field stability for high-density recording while avoiding excessive energy consumption that would result from higher voltage operation. The differential resistance peak occurs within this optimized voltage range, providing stability without over-consuming energy.
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
This configuration enables stable magnetization oscillations, enhancing recording density and maintaining signal integrity by optimizing the magnetic field generation within the device.
Implementation Method 1
a coil; and a controller electrically connected to the first terminal, the second terminal, and the coil. In a recording operation, the controller supplies a recording current to the coil
Implementation Method 2
a magnetic element provided between the first magnetic pole and the second magnetic pole... a differential resistance of the magnetic element when a positive applied voltage applied between the first terminal and the second terminal is changed while the recording current is supplied to the coil becomes a first peak when the applied voltage is the first voltage
Data Source
AI summary
According to one embodiment, a magnetic recording device includes a magnetic head and a controller. The magnetic head includes first and second magnetic poles, a magnetic element provided between the first and second magnetic poles, and first and second terminals. The controller is configured to perform a recording operation. In the recording operation, the controller is configured to supply a recording current to the coil while applying an element voltage not less than a first voltage and not more than a second voltage between the first terminal and the second terminal. A differential resistance of the magnetic element when a positive applied voltage applied between the first terminal and the second terminal is changed while the recording current is supplied to the coil becomes a first peak when the applied voltage is the first voltage.