New highly oriented soft magnetic underlayer structures for perpendicular recording
نویسندگان
چکیده
Highly oriented soft underlayers with face-centered-cubic ~fcc! phase Co, Co alloy, and composite NiFe/Co film structures have been epitaxially grown on single crystal Si wafers by sputter deposition. The epitaxial orientation relationships have been determined by x-ray diffraction and transmission electron microscopy. It was found that the soft underlayer magnetic properties can be modified in a wide range by fine tuning the Co alloy composition or the Co alloy thickness in a NiFe/Co structure. Ti films were sputter deposited on top of the NiFe and Co layers and epitaxial growth in both Ti~0001!/Co~111! and Ti~0001!/NiFe~111! was observed. Through this highly oriented Ti intermediate layer, a Co alloy perpendicular media layer with greatly improved hexagonal-close-packed ~0001! orientation can be integrated with the highly ~111! textured fcc soft magnetic underlayers. © 2000 American Institute of Physics. @S0021-8979~00!45808-1#
منابع مشابه
A novel crystalline soft magnetic intermediate layer for perpendicular recording media
In order to improve the recording efficiency in current perpendicular recording media, it is important to reduce the distance from the head to soft underlayer. In this paper, a soft magnetic intermediate layer is proposed to partially replace the presently used Ru intermediate layer. The new soft magnetic intermediate layer serves two purposes, which are as follows: 1 to decrease the thickness ...
متن کاملMicromagnetic Study of Perpendicular Magnetic Recording Media a Dissertation Submitted to the Faculty of the Graduate School of the University of Minnesota by Yan Dong in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy
introducing me to the field of magnetic recording and supervising me to do these exciting projects. This would be impossible without his guidance and encouragement in my scientific pursuit. I would like to thank him for his valuable comments and helpful discussions on my research. His academic insights, profound understanding of magnetic materials and micromagnetic theory always guided me to go...
متن کاملAnalytical Investigations in Magnetic Recording by Stephen
The Fourier method is used to provide new analytic solutions for idealized mathematical models of double-element shielded magnetoresistive (MR) recording heads. The general two-dimensional model allows analysis of various recording head configurations; a single pole head, a ring head, a dual stripe head and a differential head. The analysis accommodates both longitudinal recording (with no soft...
متن کاملSeed-layer effect on the microstructure and magnetic properties of CoÕPd multilayers
We have investigated Co/Pd multilayers deposited on either Ta or indium tin oxide ~ITO! seed layers as a potential perpendicular recording media. We have examined the microstructural evolution of the films deposited on the two different types of seed layers and related it to the magnetic properties of the films. Ta underlayer produces a strong ^111& fiber texture in the multilayer while ITO pro...
متن کاملMagnetic structures in Co-Cr media for perpendicular magnetic recording
High bit densities have been demonstrated in longitudinal as well as in perpendicular magnetic recording. For the latter an area density of more than 12 G b i t / i n 2 has been obtained in a sputtered C o C r T a hard disk with a soft magnetic underlayer recorded with a special single pole head. In this paper the role of microstructure and morphology in relation to the compositional separation...
متن کامل