NDLI: The effect of the single-spin defect on the stability of the in-plane vortex state in 2D magnetic nanodots

Content Provider	Springer Nature Link
Author	Mamica, S. Lévy, J. C. S. Depondt, Ph. Krawczyk, M.
Copyright Year	2011
Abstract	The aim of this study is to analyse the stability of the single in-plane vortex state in two-dimensional magnetic nanodots with a nonmagnetic impurity (single-spin defect) at the centre. Small square and circular dots including up to a few thousand of spins are studied by means of a microscopic theory with nearest-neighbour exchange interactions and dipolar interactions fully taken into account. We calculate the spin-wave frequencies versus the dipolar-to-exchange interaction ratio d to find the values of d for which the assumed state is stable. Transitions to other states and their dependence on d and the vortex size are investigated as well, with two types of transition found: vortex core formation for small d values (strong exchange interactions), and in-plane reorientation of spins for large d values (strong dipolar interactions). Various types of localized spin waves responsible for these transitions are identified.
Starting Page	6075
Ending Page	6083
Page Count	9
File Format	PDF
ISSN	13880764
Journal	Journal of Nanoparticle Research
Volume Number	13
Issue Number	11
e-ISSN	1572896X
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-03-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Magnetic nanodots Magnetic vortices Localized spin waves Ground state stability Nanotechnology Physical Chemistry Characterization and Evaluation of Materials Inorganic Chemistry Optics, Optoelectronics, Plasmonics and Optical Devices
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Bioengineering Modeling and Simulation

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