Effect of Copper Layers on the Coercive Force of Permalloy Films

Grishechkin, M. I.; Telesnin, R. V.; Durasova, Yu. A.; Osukhovskii, V. E.

doi:10.1002/pssb.19690360202

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…The energy of the orange peel coupling is of magnetostatic origin, and it is expected to increase with increasing roughness of the inner film surfaces. It was earlier observed [14] that the size of crystallites of evaporated samples increases with increasing thickness of the films, and with larger crystallites, larger roughness of the surfaces can be expected. This study could also be extended and used for investigations of the dependence of the roughness of the surfaces on the applied method of sample preparation and/or on the detailed technological parameters during the preparation (temperature and material of the substrates, vacuum, etc.…”

Section: Evaluation Of the Coupling Constantmentioning

confidence: 87%

Wall Transitions and Coupling of Magnetization in NiFe/C/NiFe Double Films

Toméš¹,

Niedoba²,

Rührig

et al. 1991

Phys. Stat. Sol. (a)

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AS^) (a), H. NIEDOBA (a), M. RUHRIC (b), G. WITTMANN (b), A. HUBERT (b), H. 0. GUPTA (a), L. J. HEYDERMAN4) (a), and I. B. PUCHALSKA (a)Magnetic double films separated by a non-magnetic layer are investigated, which were prepared by electron beam evaporation. Transitions between superimposed Nee1 walls and twin N M walls with quasi-walls, triggered by application of an in-plane magnetic field following the hard direction of magnetization, are studied theoretically. The computed results are compared with experiments on NiFe/C/NiFe double films and a good agreement is achieved if the magnetic coupling between the films of NiFe is assumed to increase with increasing film thickness. An original determhahon method for the coupling strength in ferromagnetically coupled films, based on the measurement of the twin wall separation, is developed.Durch Elektronenstrahlverdampfung hergestellte magnetische Doppelschichten werden untersucht, die durch eine nichtmagnetische Zwischenschicht getrennt sind. In solchen Schichtsystemen gibt es zwei Arten von 180"-Wanden, antiparallel iiberlagerte Neehande und parallel eusgerichtete Zwillingswande. Der Ubergang zwischen beiden Formen in einem Magnetfeld entlang der schweren Richtung wird berechnet und mit Beobachtungen an Schichten des NiFe/C/NiFe-Systems verglicben. Gute obereinstimmung zwischen Theorie und Experiment wird erzielt, wenn angenommen wird, daB sich die (ferromagnetische) Kopplung zwischen den Schichten mit zunehmender NiEe-Schichtdicke verstarkt. Die Vermessung des Abstandes zwischen Wand und Quasiwand in den Zwillingswiinden envies sich zusammen mit der numerischen Simulation als empfindliche Methode zur Messung der Kopplungskonstanten in ferromagnetisch gekoppelten Doppelschichten. I) 1 place A.

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Section: Evaluation Of the Coupling Constantmentioning

confidence: 87%

Wall Transitions and Coupling of Magnetization in NiFe/C/NiFe Double Films

Toméš¹,

Niedoba²,

Rührig

et al. 1991

Phys. Stat. Sol. (a)

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Investigations on the multilayer systems NiFe-Metal-NiFe

Seifarth¹,

Franke²,

Burger³

1970

Phys. Stat. Sol. (a)

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Investigations are made on multiple films where the coupling by a copper or chromium intermediate film is used to improve the creep resistivity. Objects of investigations are the structure of the intermediate film, the types of the domain walls, and the coercive force with respect to the intermediate film thicknesses and evaporation conditions. The measurement of the creep properties is carried out on magnetically defined elements. To explain the creep behaviour at different interfilm thicknesses, a model is proposed according to which the bulging of the wall under the action of a field parallel to the wall is a supposition of the creeping.

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Magnetic properties and domain structure studies in dc triode-sputtered permalloy/carbon multilayer films

Gupta¹,

Niedoba²,

Heyderman³

et al. 1991

Journal of Applied Physics

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Double-layer and multiple-layer thin films of permalloy with carbon as a intermediate nonmagnetic spacer were prepared by low-energy dc triode sputtering. Coupling between the two layers of the double films is investigated on a series of samples with a fixed thickness of permalloy layers (dp = 300 Å) and thickness of the carbon layer dc, varying from 0 to 25 Å. Thickness dc = 10 Å is found to be the limiting value for the carbon layer to be continuous and 20 Å for domain structures in the two magnetic films to decouple. Saturation magnetization Ms, uniaxial anisotropy field, Hk, and coercive force Hc of multilayers with dc = 10 Å and dp from 50 to 600 Å (number of magnetic layers from 12 down to 1) are measured and found consistent with earlier results by other authors. Multiple domain walls in the multilayers are investigated by Lorentz electron microscopy.

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Effect of Copper Layers on the Coercive Force of Permalloy Films

Cited by 3 publications

References 10 publications

Wall Transitions and Coupling of Magnetization in NiFe/C/NiFe Double Films

Wall Transitions and Coupling of Magnetization in NiFe/C/NiFe Double Films

Investigations on the multilayer systems NiFe-Metal-NiFe

Magnetic properties and domain structure studies in dc triode-sputtered permalloy/carbon multilayer films

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