发明名称 |
Method for measuring longitudinal bias magnetic field in a tunnel magnetoresistive sensor |
摘要 |
A method for measuring longitudinal bias magnetic field in a tunnel magnetoresistive sensor of a magnetic head, the method includes the steps of: applying an external longitudinal time-changing magnetic field onto the tunnel magnetoresistive sensor; determining a shield saturation value of the tunnel magnetoresistive sensor under the application of the external longitudinal time-changing magnetic field; applying an external transverse time-changing magnetic field and an external longitudinal DC magnetic field onto the tunnel magnetoresistive sensor; determining a plurality of different output amplitudes under the application of the external transverse time-changing magnetic field and the application of different field strength values of the external longitudinal DC magnetic field; plotting a graph according to the different output amplitudes and the different field strength values; and determining the strength of the longitudinal bias magnetic field according to the graph and the shield saturation value.
|
申请公布号 |
US2012249130(A1) |
申请公布日期 |
2012.10.04 |
申请号 |
US201113067887 |
申请日期 |
2011.07.01 |
申请人 |
MOK SIUMAN;LAM HOKEI;LEUNG CHEUKWING;DING JUREN;NI RONGKWANG;KWAN WANYIN;LUI CHEUKMAN;LUENG CHIUMING;SAE MAGNETICS (H.K.) LTD. |
发明人 |
MOK SIUMAN;LAM HOKEI;LEUNG CHEUKWING;DING JUREN;NI RONGKWANG;KWAN WANYIN;LUI CHEUKMAN;LUENG CHIUMING |
分类号 |
G01R33/18 |
主分类号 |
G01R33/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|