A study on the magnetic switching behaviour of nanostructured magnetic materials

Zweck, Josef; Bräundl, Silvia; Henzelmann, Sonia; Schneider, M.; Otto, Stephan; Heumann, Martin; Uhlig, Thomas

doi:10.1016/s1359-6462(02)00613-9

Cited by 1 publication

(1 citation statement)

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“…Kirk et al 7 carried out in situ TEM experiments on rectangular 300ϫ 80 nm 2 -NiFe and Co dots ͑normally referred to as elements when noncircular͒, which were not found to be a single domain. Zweck et al 8 studied the single domain 200-nm ellipses using Fresnel mode LTEM. The magnetization reversal mechanism could not be studied using this mode, and only the field at which the magnetization in the dots reversed was measured.…”

Section: Introductionmentioning

confidence: 99%

Remanent magnetization states and interactions in square arrays of 100-nm cobalt dots measured using transmission electron microscopy

Bromwich

Köhn

Petford‐Long

et al. 2005

Journal of Applied Physics

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Large area square arrays of circular cobalt dots, nominally 100 nm in diameter and 20 nm in thickness, were patterned using interference lithography. Magnetic remanent states were measured using off-axis electron holography in the transmission electron microscope ͑TEM͒. The results show that the dots are mostly single domain, although vortex states and multidomain configurations are occasionally observed. Significant magnetic interactions between adjacent dots result in variations in their magnetization direction away from the direction of the applied field. The suitability of such dots for data storage applications is discussed. Quantitative magnetic phase measurements were also obtained by applying the transport of intensity equation to images acquired using the Fresnel mode of Lorentz microscopy in the TEM. The consistency between the electron holography and transport of intensity equation ͑TIE͒ results is assessed.

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Section: Introductionmentioning

confidence: 99%