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Magnetoresistance in silicon based ferrite magnetic tunnel junction
S. Ravi,A. Karthikeyan,N. Angel Nesakumari,K.S. Pugazhvadivu,K. Tamilarasan 한국물리학회 2014 Current Applied Physics Vol.14 No.3
We report magnetoresistance for silicon based magnetic tunnel junction. We used cobalt ferrite & cobalt nickel ferrite as free layer and pinned layer. The magnetoresistance measured at room temperature through silicon by fabricating FM/Si/FM magnetic tunnel junction. Magnetoresistance shows a loop type behavior with 3.7%. We have successfully demonstrated spin tunneling through silicon with ferrite junction that opens the door for potential candidate for spintronics devices. The spin-filtering effect for this double spin-filter junction is also discussed.
A New Marginal Color Image Water Marking Method based on Logical Operators
B. Vijaya Kumar,M.Radhika Mani,G. Roseline NesaKumari,Dr. V. Vijaya Kumar 보안공학연구지원센터 2009 International Journal of Security and Its Applicat Vol.3 No.4
Image hiding is a technique that embeds the images into a cover image which makes the watermarks imperceptible so that they can be securely transmitted to the receiver. In this paper, an effective color image watermarking method based on the marginal strategy is proposed. The method uses logical operators like AND and XOR on the nibble to hide the image with in the cover image. To test the robustness of the stego image the present method is applied on different kinds of cover images and the resulting perceptual quality is good.