Analysis of Magnetic Flux Through Magnetic Film With Negative Permeability

Muroga, Sho; Asazuma, Yuki; Endo, Yasushi; Shimada, Yutaka; Yamaguchi, Masahiro

doi:10.1109/tmag.2012.2205139

Cited by 9 publications

(1 citation statement)

References 4 publications

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“…The dynamic magnetic behavior of magnetic films has gained increased attention due to the raised data rate in magnetic recording [1], the use of magnetic films for high frequency inductors [2,3] and their application as microwave filters [4,5]. Moreover, the excitation and modification of spin waves has led to considerable interest in the field of magnonic crystals [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Magnetization dynamics of magnetic domain wall imprinted magnetic films

et al. 2014

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The influence of micromagnetic objects on the dynamic magnetic excitation in magnetic thin films is studied by imprinting periodic domain wall patterns through selective ion irradiation in exchange biased Ni 81 Fe 19 /IrMn structures. For high domain wall densities an increased precessional frequency is achieved. The zero field resonance of the domain wall state hereby depends directly on the stripe period, showing a pronounced increase with decrease of domain wall spacing. With the abrupt annihilation of magnetic domain walls with an applied bias field a jump-like decrease in precessional frequency takes place. The experimental data and micromagnetic simulations prove that the characteristic collective dynamic mode for the domain wall configurations is attributed to strongly coupled tilted magnetization structure. This is evidenced by an overlapping Néel wall structure for the narrowly spaced imprinted antiparallel unidirectional anisotropy state. The controlled introduction of high density frozen-in micromagnetic objects is a novel way to control the dynamic magnetic properties of continuous magnetic thin films.

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