Research Areas


New Interface and Thin Films

We are studying both (i) novel complex oxide and chalcogenide thin films with a range of functional properties and (ii) functional interfaces created from materials that do not exhibit these functional properties.

Selected Publications

Magnetic Junction Devices

We are developing magnetic junction devices in order (i) to understand the role of interfaces and conduction mechanisms from a fundamental perspective and (ii) to develop new classes of devices from a technological perspective.

Selected Publications

Magnetic Nanostructures

We are interested in the behavior of highly spin polarized oxide materials when geometrically confined to the nanometer length scale. Such studies are of fundamental interest but also have potential applications as future magnetic media or magnetic random access memory.

Selected Publications

Photonics

A smaller effort in our group is in the area of photonics research and increasingly in the intersection of magnetics and photonics- magnetophotonics. In the area of materials development, we are developing complex materials with photomagnetic functionality (stay tuned for publications). In the device/systems area, we have focused on passive optical devices and optical bench systems based on silicon.

Selected Publications

SELECTED PUBLICATIONS

New Interface and Thin Film Materials

• J.S. Bettinger, R.V. Chopdekar, M. Liberati, J.R. Neulinger, M. Chshiev, Y. Takamura, L.M.B. Alldredge, E. Arenholz, Y.U. Idzerda, A.M. Stacy, W.H. Butler, Y. Suzuki,”Magnetism and Transport of CuCr2Se4 Thin Films,” Journal of Magnetism and Magnetic Materials 318 65 (2007).
• R.V. Chopdekar and Y. Suzuki, “Magnetoelectric Coupling in Epitaxial CoFe2O4 on BaTiO3,” Applied Physics Letters 89 182506 (2006).
• Yayoi Takamura, Jostein K. Grepstad, Rajesh V. Chopdekar, Ann F. Marshall, Hong Zheng, John F. Mitchell, and Yuri Suzuki, Structural, Magnetic and Electronic Properties of (110)-Oriented Epitaxial Thin Films of the Bilayer Manganite La1.2Sr1.8Mn2O7, Applied Physics Letters 87 142508 (2005).

Magnetic Junction Devices

• B.B. Nelson-Cheeseman, R.V. Chopdekar, L.M.B. Alldredge, J.S. Bettinger, E. Arenholz, Y. Suzuki, “Spin Transport Tuned by Interfacial and Barrier Layer Magnetism in Magnetic Tunnel Junctions,” Rapid Communications Physical Review B  76 R220410 (2007).
• L.M.B. Alldredge, R.V. Chopdekar, B.B. Nelson-Cheeseman, Y. Suzuki, “Spin-polarized conduction in oxide magnetic tunnel junctions with spinel/perovskite interfaces,” Applied Physics Letters 89 182504 (2006).
• R. V. Chopdekar, G. Hu, A.C. Ford, and Y. Suzuki, “Magnetics and Magnetotransport in Epitaxial Magnetite Heterostructures,” Journal of Electronic Materials 33 1254 (2004).
• Lisa M.B. Alldredge and Y. Suzuki, “Colossal Magnetoresistance Materials Based Junctions with Antiferromagnetic Insulating Barriers,” Applied Physics Letters 85 437 (2004).
• G. Hu and Y. Suzuki, "Negative spin polarization of Fe3O4 in magnetite/manganite based junctions,” Physical Review Letters 89 276601 (2002).

Magnetic Nanostructures

• Yayoi Takamura, Rajesh V. Chopdekar, Andreas Scholl, Andrew Doran, J. Alexander Liddle, Bruce Harteneck, and Yuri Suzuki, “Tuning magnetic domain structure in La0.7Sr0.3MnO3 islands by matrix and substrate strain,” Nano Letters 6 1287 (2006).
• Yan Wu, Yana Matsushita, Y. Suzuki, “Nanoscale Magnetic Domain Structure in Colossal magnetoresistance Materials Islands,” Physical Review B Rapid Communications  64 220404 (2001).

Photonics

• Lu Chen, Michael C.Y. Huang, Carlos F.R. Mateus, Connie J. Chang-Hasnain, Y. Suzuki, “Fabrication and Design of an Integrable Sub-wavelength Dielectric Mirror” Applied Physics Letters 88 031102 (2006).
• Carlos Mateus, Michael C. Huang, Lu Chen, Connie Chang-Hasnain, Yuri Suzuki, “Broadband Mirror (1.12-1.62µm) Using Single Layer Sub-Wavelength Grating,” IEEE Photonics Technology Letters 16 1676 (2004).
• Lu Chen, G.E. Kohnke, Y. Suzuki, “Integrated Platform for Photonic Crystal Devices at Near Infrared Wavelengths,” Applied Physics Letters 80 1514 (2002).