The dependence of giant magnetoresistance of sputtered granular type(Co-Ag)/Ag multilayers on the thickness of Ag layers and magnetic layers with varying Co content in the magnetic layers was studied.The magnetoresist...The dependence of giant magnetoresistance of sputtered granular type(Co-Ag)/Ag multilayers on the thickness of Ag layers and magnetic layers with varying Co content in the magnetic layers was studied.The magnetoresistance ratioΔR/R was found to be enhanced by 2-7 times comparing with the single layer granular films.The enhancement was explained by the antiferromagnetic coupling due to magnetostatic interaction between the Co clusters in neighboring magnetic layers.展开更多
We present a magnetic force microscopy study of alternate sputtered （001） oriented L1o phase FePt films. It is found that the root-mean-square value of phase shift of magnetic force images, （ △Ф）rms, can be used...We present a magnetic force microscopy study of alternate sputtered （001） oriented L1o phase FePt films. It is found that the root-mean-square value of phase shift of magnetic force images, （ △Ф）rms, can be used to characterize the perpendicular anisotropy for a series of specimens. Therefore, the considerable improvement of the perpendicular anisotropy after post-annealing can be characterized. In addition, the magnetic properties, magnetic and crystalline microstructures before and after post-annealing are compared for the typical [Fe5nm Pt5 nm]10 film with substrate temperature T8 = 500℃, single layer thickness d = 5 nm and total layer thickness D=100 nm to confirm the effect of post-annealing on improving the perpendicular anisotropy for Fe-Pt films.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos.19754001 and 59392800,and Shanghai Research Center for Applied Physics.
文摘The dependence of giant magnetoresistance of sputtered granular type(Co-Ag)/Ag multilayers on the thickness of Ag layers and magnetic layers with varying Co content in the magnetic layers was studied.The magnetoresistance ratioΔR/R was found to be enhanced by 2-7 times comparing with the single layer granular films.The enhancement was explained by the antiferromagnetic coupling due to magnetostatic interaction between the Co clusters in neighboring magnetic layers.
基金Supported by the Nati0llal Natural Science Fouudation of China under Grant No 10374110, and tile Natural Science Foundation of Education Commission of Anhui Province under Grant No 2005KJ037ZD.
文摘We present a magnetic force microscopy study of alternate sputtered （001） oriented L1o phase FePt films. It is found that the root-mean-square value of phase shift of magnetic force images, （ △Ф）rms, can be used to characterize the perpendicular anisotropy for a series of specimens. Therefore, the considerable improvement of the perpendicular anisotropy after post-annealing can be characterized. In addition, the magnetic properties, magnetic and crystalline microstructures before and after post-annealing are compared for the typical [Fe5nm Pt5 nm]10 film with substrate temperature T8 = 500℃, single layer thickness d = 5 nm and total layer thickness D=100 nm to confirm the effect of post-annealing on improving the perpendicular anisotropy for Fe-Pt films.
