We developed a low-pressure magnetron sputtering technique together with the linear dynamic deposition method and successfully fabricated a new type of magnetic tunneling junctions (MTJs) with (001) textured MgO barrier. We are the only US university to have achieved this success as of April 2007.
Johns Hopkins University Highlights
May 31, 2007
Secondary Teacher Interacting with Materials Professors Strikes Gold [Research]
Background: The JHU MRSEC conducts extensive K-12 educational outreach programs aimed at promoting interest in and awareness of the importance of modern materials research. The MRSEC’s Research Experience for Teachers (RET) program provides high school teacher the opportunity to conduct research in MRSEC and to use the MRSEC’s resources for the development of classroom […]
May 31, 2007
Domains and Domain Wall Motion in Perpendicular Anisotropy Materials [Research]
Magnetic thin films with perpendicular magnetic anisotropy (PMA) have special attributes for explorations and perpendicular magnetic recording. We have observed three hitherto unknown new features in materials with PMA:
1. Asymmetrical domain nucleation centers that produce domains for only one magnetization direction (Fig. 1).
2. The backward domain wall motion of the […]
November 29, 2006
Asymmetrical Nanorings [Research]
The vortex state of a magnetic nanoring has special attributes of no magnetic poles nor stray fields. The circulatory magnetization can have two chiralities:, left-handed or right-handed, for storing “0″ and “1″, as shown in Fig. 1.
Fig. 1: Two chiralities of a magnetic nanorings for storing “1″ and “0″.
We have developed a new method for […]