研究目的
To analyze the performance of tunneling magnetoresistance (TMR) read heads at the off-track reading condition under the influence of recorded magnetization patterns on the medium and to understand how the magnetic field due to various data patterns impacts the read head behavior.
研究成果
The performance of hard biased read sensors at off-track reading is significantly influenced by the media magnetic field. A model accounting for noncoherent rotation of local magnetic moments is effective for studying reader performance at off-track reading. This effect is important for recording schemes like SMR and 2-DMR, especially with higher coercivity media and extremely small head to media spacing.
研究不足
The study is limited to specific parameters of the reader and media, and the analysis focuses on the influence of media magnetic field on the dc resistance and thermal magnetic noise of the sensor. The effect of thermal agitation is estimated but not fully explored.
1：Experimental Design and Method Selection:
The analysis is based on micromagnetic modeling of the state of magnetization in the read sensor, considering external magnetic fields due to both the hard bias and the media magnetization pattern. A finite element method is used to solve the governing Maxwell equations for magnetic field analysis.
2：Sample Selection and Data Sources:
The study focuses on TMR read heads and granular media with specific parameters.
3：List of Experimental Equipment and Materials:
Parameters of the reader and media are specified, including dimensions and magnetic properties.
4：Experimental Procedures and Operational Workflow:
The reader resistance is calculated based on the state of magnetization inside the read sensor element, considering the external field due to hard bias and media magnetization. The read sensor is discretized into smaller geometric elements for local magnetization distribution analysis.
5：Data Analysis Methods:
The total reader conductance is obtained using a discretized model, and the variation of reader resistance against read sensor positions is analyzed.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
