Roger Kirby, Professor Emeritus
Physics & Astronomy
University of Nebraska–Lincoln
087 Jorgensen Hall
Lincoln, Nebraska 68588-0299
Professor Kirby's research is directed towards the understanding of magnetism in nanoscale and nanostructured materials, including thin films, multilayer films, and laterally patterned films. His group has fabricated one- and two-dimensional arrays of laterally structured magnetic systems by direct interference laser annealing, which is a very versatile method of varying materials properties without modifying surface topography. This technique can be used to form nanoscale arrays of dots and/or antidots in thin magnetic films. This has led to the observation of a magnetic anisotropy lattice, in which magnetic dots of in-plane magnetic anisotropy are formed in a background of perpendicular magnetic anisotropy. His group has developed several optical systems for studying magneto-optical properties of thin film and bulk samples over a wide range of wavelengths and temperatures. Most recently, his group has developed a “pump-probe” magneto-optical system based on a femtosecond laser, which permits the observation of magnetization precession and damping in thin films in a variety of experimental configurations. This system can provide a detailed understanding of magnetic coupling between nanoelements in thin films, multilayers and laterally structured materials.
- Steven A. Michalski, Jian Zhou, Ralph Skomski, and Roger D. Kirby, “Coupled precession modes in indirect exchange-coupled [Pt/Co]-Co thin films,” J. Applied Physics 101, 09D115-1 to 09D115-3 (2007).
- Nikolay I. Polushkin, Steven A. Michalski, Lanping Yue, and Roger D. Kirby, “Evidence of long-wavelength collective excitations in magnetic superlattices,” Phys. Rev. Letters 97, 256401 (2006).
- Aliekber Aktag, S. Michalski, L. Yue, R. D. Kirby, and Sy-Hwang Liou, “Formation of an anisotropy lattice in Co/Pt multilayers by direct laser interference patterning,” J. Appl. Phys. 99, 093901-1 to 093901-9 (2006).
- R. Skomski, J. Zhou, R. D. Kirby, and D. J. Sellmyer, “Micromagnetic energy barriers,” J. Appl. Phys. 99, 08B906-1 to 08B906-3 (2006).
- R. Skomski, J. Zhou, R. D. Kirby, and D. J. Sellmyer, “Magnetic aging,” Proceedings of the Materials Research Society, Symposium 887, pp. 133-138, Eds. M Chipara, O. Puglisi, R. Skomski, F. Jones, B. Hsiao (2006).
- R. Skomski, J. Zhou, R. D. Kirby, and D. J. Sellmyer, “Fast and slow magnetization processes in magnetic recording media, Proceedings of the Materials Research Society,” Symposium 887, pp. 139-144, Eds. M Chipara, O. Puglisi, R. Skomski, F. Jones, B. Hsiao (2006).
- L. Y. Chen, S. Y. Wang, and R. D. Kirby, “Magneto-optical properties of nanostructured media” (Review Chapter), in book Advanced Magnetic Materials, Kluwer Academic/Plenum and Tsinghua University Press, 2006 (Y. Liu, D. Shindo, D. J. Sellmyer, Eds.).
Graduates and Current Affiliations
- Bob Buckley, B.S. 2007. Physics graduate program at UC-Santa Barbara.
- Nikolay Polushkin, was Visiting Assistant Professor 2004-2006. Now returned to his home institution at Russian Academy of Sciences, Nishniy Navgorad.
- Aliekber Aktag, Ph.D. 2004. Now is Assistant Professor, Abant Izzet Baysal Universitesi, Turkey.