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Anomalous Magnetic Properties of a 2-dimensional Rhomboid Spin Anti-dot Lattice (vol 58, pg 998, 2011)

Title
Anomalous Magnetic Properties of a 2-dimensional Rhomboid Spin Anti-dot Lattice (vol 58, pg 998, 2011)
Author
이성재
Keywords
Abnormal magnetic properties; Spin-photonic crystal; Magneto-transport; Magneto-resistance; Co/Ni anti-dot arrays
Issue Date
2011-04
Publisher
Korean Physical Society
Citation
Journal of the Korean Physical Society, 2011, 58(6), P.1716-1716
Abstract
We fabricated a 2-dimensional spin lattice of circular anti-dots on a silicon substrate by using the photolithography and the wet-etching techniques. A rhomboid lattice symmetry of anti-dots with a diameter of about 1 ? was formed in a 40-nm-thick Co layer with a 5-nm-thick Ni underlayer. The magnetic anisotropy was investigated by using magneto-optical Kerr-effect magnetometry to identify the easy and the hard axes. A systematic study of the magnetic-reversal process was performed using magnetization and magneto-transport measurements with the field applied along the hard axis of the lattice. Anomalous features, a 3-step transition of the magnetization, a nonmonotonous temperature dependence of the coercive field, and a complex behavior of the magneto-resistance data, were observed in the magnetic-reversal process. We speculate that these anomalies originate from the vortex-related phenomena that are inherent in the submicrostructures.
URI
http://www.jkps.or.kr/journal/view.html?volume=58&number=4(2)&spage=998&year=2011http://hdl.handle.net/20.500.11754/66454
ISSN
0374-4884
DOI
10.3938/jkps.58.998
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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