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Full-Text Articles in Physics
List Of Publications (Through June 2006): Roger Kirby, Roger D. Kirby
List Of Publications (Through June 2006): Roger Kirby, Roger D. Kirby
Roger Kirby Publications
Chronological list of 76 articles and 90 abstracts & proceedings publications by Roger Kirby, Department of Physics and Astronomy, University of Nebraska-Lincoln.
Formation Of An Anisotropy Lattice In Co/Pt Multilayers By Direct Laser Interference Patterning, Aliekber Aktag, Steven A. Michalski, Lanping Yue, Roger D. Kirby, Sy_Hwang Liou
Formation Of An Anisotropy Lattice In Co/Pt Multilayers By Direct Laser Interference Patterning, Aliekber Aktag, Steven A. Michalski, Lanping Yue, Roger D. Kirby, Sy_Hwang Liou
Roger Kirby Publications
We report on the use of direct laser interference patterning to form an “anisotropy” lattice in Co/Pt thin film multilayers. Co/Pt multilayers have been extensively studied and, for the compositions studied here, are characterized by strong perpendicular magnetic anisotropy in which the magnetic moment is perpendicular to the film plane. In direct laser interference patterning, two-to-four coherent laser beams from a pulsed Nd:YAG laser strike the sample surface simultaneously, and for sufficiently intense beams the sample properties are modified locally where interference maxima occur. Kerr rotation, magnetic force microscopy, and atomic force microscopy measurements after patterning by one pulse from …
Micromagnetic Energy Barriers, Ralph Skomski, Jian Zhou, Roger D. Kirby, David J. Sellmyer
Micromagnetic Energy Barriers, Ralph Skomski, Jian Zhou, Roger D. Kirby, David J. Sellmyer
Roger Kirby Publications
The structure of micromagnetic energy barriers responsible for slow magnetization processes is investigated. Thermally activated slow magnetization processes proceed over energy barriers whose structure is determined by the micromagnetic free energy. This restricts the range of physically meaningful energy barriers. An analysis of the underlying micromagnetic free energy yields power-law dependences with exponents of 3/2 or 2 for physically reasonable models. This must be contrasted to other power laws, such as linear laws, and to 1/H-type dependences. In the limit of small energy barriers, corrections to the Arrhenius law become important. In this regime, there is no simple …