Complex transverse AC magneto-optic susceptometer for determination of volume and anisotropy field distribution in recording media
    1.
    发明授权
    Complex transverse AC magneto-optic susceptometer for determination of volume and anisotropy field distribution in recording media 有权
    复杂的横向交流磁光探测器,用于确定记录介质中的体积和各向异性场分布

    公开(公告)号:US07166997B2

    公开(公告)日:2007-01-23

    申请号:US10679905

    申请日:2003-10-06

    IPC分类号: G01R33/02

    CPC分类号: G01R33/1207 G01R33/0325

    摘要: A method and apparatus for determining volume and anisotropy field distribution of thin film granular material includes the use of a magneto-optic probe, a lock-in amplifier, and a computer. The magneto-optic probe utilizes the Kerr effect in order to determine the transverse AC susceptibility of the sample. The Lock-in amplifier determines the complex parameters of the susceptibility as a function of the DC field and AC frequency. Separate distribution values of anisotropy field and grain volume can then be determined mathematically from the relationship of complex susceptibility parameters to the DC field strength.

    摘要翻译: 用于确定薄膜颗粒材料的体积和各向异性场分布的方法和装置包括使用磁光探针,锁定放大器和计算机。 磁光探针利用克尔效应来确定样品的横向AC敏感性。 锁定放大器确定作为直流电场和交流频率的函数的磁化率的复杂参数。 然后可以从复合磁化率参数与直流场强度的关系数学地确定各向异性场和晶粒体积的分离值。