A theory of EM wave propagation through magnetic multilayers and superlattices is presented based on the propagation matrix of a magnetic film. By using the P matrix, the transmission and reflection coefficients of la...A theory of EM wave propagation through magnetic multilayers and superlattices is presented based on the propagation matrix of a magnetic film. By using the P matrix, the transmission and reflection coefficients of layered magnetic media, including: (l)semi-infinite magnetic surfaces, (2) magnetic multilayers, (3) semi-infinite magnetic superlattices are obtained. The numerical results show that the EM modes of a magnetic layer system is excited and manifested as the sharp dips in the S-polarized reflection and the dispersion curves of the magnetic polaritons can be measured by a method similar to the attenuated total reflection (ATR) technique.展开更多
采用直流磁控溅射法在玻璃基片上制备了Pt底层和MgO/Pt双底层的Co/Ni多层膜样品,通过反常霍尔效应研究了不同MgO厚度和退火温度对样品垂直磁各向异性(perpendicular magnetic anisotropy,PMA)的影响.随着底层中MgO厚度的逐渐增加,样品...采用直流磁控溅射法在玻璃基片上制备了Pt底层和MgO/Pt双底层的Co/Ni多层膜样品,通过反常霍尔效应研究了不同MgO厚度和退火温度对样品垂直磁各向异性(perpendicular magnetic anisotropy,PMA)的影响.随着底层中MgO厚度的逐渐增加,样品的矫顽力也随之增强,霍尔电阻变化不大;对样品进行退火处理后发现,单纯Pt底层的Co/Ni多层膜随着退火温度的升高,霍尔电阻逐渐降低,矫顽力则迅速降低,热稳定性较差;而当MgO/Pt双底层的样品在200?C退火后矫顽力大幅增加,霍尔电阻略微有所减小,更高的退火温度使得Co和Ni合金化,导致多层膜的PMA特征减弱.展开更多
基金Supported by the National Natural Science Foundation of China
文摘A theory of EM wave propagation through magnetic multilayers and superlattices is presented based on the propagation matrix of a magnetic film. By using the P matrix, the transmission and reflection coefficients of layered magnetic media, including: (l)semi-infinite magnetic surfaces, (2) magnetic multilayers, (3) semi-infinite magnetic superlattices are obtained. The numerical results show that the EM modes of a magnetic layer system is excited and manifested as the sharp dips in the S-polarized reflection and the dispersion curves of the magnetic polaritons can be measured by a method similar to the attenuated total reflection (ATR) technique.
文摘采用直流磁控溅射法在玻璃基片上制备了Pt底层和MgO/Pt双底层的Co/Ni多层膜样品,通过反常霍尔效应研究了不同MgO厚度和退火温度对样品垂直磁各向异性(perpendicular magnetic anisotropy,PMA)的影响.随着底层中MgO厚度的逐渐增加,样品的矫顽力也随之增强,霍尔电阻变化不大;对样品进行退火处理后发现,单纯Pt底层的Co/Ni多层膜随着退火温度的升高,霍尔电阻逐渐降低,矫顽力则迅速降低,热稳定性较差;而当MgO/Pt双底层的样品在200?C退火后矫顽力大幅增加,霍尔电阻略微有所减小,更高的退火温度使得Co和Ni合金化,导致多层膜的PMA特征减弱.
