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Title: Spin re-orientation in magnetostatically coupled Ni80Fe 20 ellipsoidal nanomagnets
Authors: Jain, S. 
Adeyeye, A.O. 
Singh, N.
Issue Date: 2010
Citation: Jain, S., Adeyeye, A.O., Singh, N. (2010). Spin re-orientation in magnetostatically coupled Ni80Fe 20 ellipsoidal nanomagnets. Nanotechnology 21 (28) : -. ScholarBank@NUS Repository.
Abstract: We investigate the influence of magnetostatic coupling on the spin configurations and magnetization reversal mechanism in a one-dimensional linear chain of densely packed Ni80Fe20 ellipsoidal nanomagnets arranged in two basic configurations (elements coupled along the major or minor axes). Using magnetic force microscopy (MFM) we observed that for geometrically identical ellipsoidal nanomagnets the magnetic states at remanence are strongly dependent on the arrangement of the ellipsoid due to competition between the inherent shape and configuration anisotropies. When the elements are coupled along the major axis, the individual elements adopt a single domain magnetic state at remanence for field applied along the linear chain. This is in contrast with a wide range of magnetic states (single vortex states, double vortex states and modified single domain states) observed for elements coupled along the minor axis and also isolated elements. We have conducted a detailed investigation on the magnetization reversal mechanisms for both configurations and have correlated our experimental results with micromagnetic simulations. © 2010 IOP Publishing Ltd.
Source Title: Nanotechnology
ISSN: 09574484
DOI: 10.1088/0957-4484/21/28/285702
Appears in Collections:Staff Publications

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