Soft magnetic multilayers: The role of the magnetostriction

Dirne, F.W.A.; Tolboom, J. A. M.; Wit, H.J. de; Witmer, C.H.M.

doi:10.1016/0304-8853(90)90562-5

Cited by 7 publications

(2 citation statements)

References 4 publications

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“…These results suggest that the magnetostriction coefficient of our multilayers must contain a contribution other than that of the superposition. We investigated a possible interface contribution on the magnetostriction, which could lead to an increase, as several authors reported in other systems cited above [1][2][3][4][5][6][7][8].…”

Section: Resultsmentioning

confidence: 99%

“…They found Ni 50 Fe 50 interdiffusion layers with thicknesses of 0.96 nm by considering that magnetostriction is determined by the balance in magnetostriction between the Ni, Fe and NiFe interdiffusion layers. Dirne and co-workers also studied the magnetostriction in ion-beam sputtered Fe/Co multilayers [2,3]. These Fe/Co multilayers contained bcc Fe and hcp Co, both having negative magnetostriction values.…”

Section: Introductionmentioning

confidence: 99%

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Interface effects on magnetostriction in pulsed laser deposited Co/Fe/Co cylindrical soft magnetic multilayers

Favieres¹,

Vergara²,

Madurga³

2007

J. Phys. D: Appl. Phys.

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Amorphous-nanocrystalline Co/Fe/Co soft magnetic multilayers were deposited by a pulsed laser. The thickness of the Co layers was constant at 18.7 nm for each layer and the Fe layer was varied between 0 and 110 nm. The spontaneous magnetization of the films was proportional to the Co and Fe layer thicknesses. Their isotropic saturation magnetostriction coefficients (λs) were determined. The λs changed from negative to positive values depending on the thickness of the Fe layer. The magnetostriction of the multilayers was greater than what would be expected from the proportional superposition of λs(Co) and λs(Fe) in the interval 0 ≤ x ≤ 50 at.% Fe. The maximum magnetostriction deviation was seen at an iron content of ≈26%. The larger experimental magnetostriction values are explained by an interface contribution, in which Fe and Co atoms diffuse into the adjacent layers. Assuming this interface contribution is due to the formation of two layers of Fe50Co50 in the trilayer structure, we were able to calculate the thickness and the magnetostriction coefficient of each interdiffusion layer, t(FeCo) = (1.4 ± 0.3) nm and λs(FeCo) = +(240 ± 10) × 10−6.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interface effects on magnetostriction in pulsed laser deposited Co/Fe/Co cylindrical soft magnetic multilayers

Favieres¹,

Vergara²,

Madurga³

2007

J. Phys. D: Appl. Phys.

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Nanocrystalline Materials for video recorder heads

1991

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In present video recorders the magnetic material of the record/playback head is usually a crystalline ferrite. These materials are, however, not so suitable, when substantially finer details on the magnetic tape are required, e.g. for highdefinition television (HDTV) recording. The search for an alternative has resulted in a new type of magnetic material: mnltilayers in which crystalline iron layers of about 10 nm thickness are alternated with even thinner amorphous iron-alloy layers. These 'nanocrystalline' materials combine a high saturation magnetization with a high permeability in the MHz frequency range, allowing video recording at much increased information densities.

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