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Width-Dependent Transition of Magnetic Domain Configuration in Nanostructured CoFe/Pt Multilayered Nanowires |
Journal of Magnetics, Volume 17, Number 4, 31 Dec 2012, Pages 242-244 |
Soong-Geun Je (Department of Physics, Seoul National University), Jae-Chul Lee (Department of Physics, Seoul National University, Current affiliation: Process Development Team, Semiconductor R&D Center, Samsung Electronics Co.), Kab-Jin Kim (Department of Physics, Seoul National University, Current affiliation: Institute for Chemical Research, Kyoto University), Byoung-Chul Min (Center for Spintronics Research, Korea Institute of Science and Technology), Kyung-Ho Shin (Center for Spintronics Research, Korea Institute of Science and Technology), Sug-Bong Choe * (Department of Physics, Seoul National University) |
Abstract |
We report on the basis of experiments that magnetic domain structures exhibit a transition between single and dendrite domains with respect to the width of ferromagnetic nanowires. This transition is directly observed in CoFe/Pt multilayered nanowires having a width in the range of 580 nm to 4.2 μm with a magnetic force microscope. Nanowires wider than 1.5 μm show typical dendrite domain patterns, whereas the nanowires narrower than 690 nm exhibit single domain patterns. The transition occurs gradually between these widths, which are similar to the typical widths of the dendrite domains. Such a transition affects the strength of the domain wall propagation field; this finding was made by using a time-resolved magneto-optical Kerr effect microscope, and shows that the domain wall dynamics also exhibit a transition in accordance with the domain configuration.
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Keywords: magnetic domain; transition; dendrite domain; nanowire-width |
DOI: http://dx.doi.org/10.4283/JMAG.2012.17.4.242 |
Full Text: PDF |
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