A comparison of ferromagnetic resonance with magnetic moment and x-ray film thickness measurements for thin Permalloy films
- 1 August 1972
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 43 (8), 3538-3542
- https://doi.org/10.1063/1.1661751
Abstract
In an effort to resolve the ambiguity of the source of pinning of the magnetization invoked in spin‐wave resonancemeasurements, a correlation of the ratio of magnetic moment and x‐ray film thickness with the value of effective demagnetizing field 4πNM as determined from resonance, for 81% Ni‐19% Fe (Permalloy) evaporated films (10−6 Torr) 40 to 400 Å thick, has been performed. The remarkable agreement of both quantities demonstrates that the thickness dependence of both quantities is related to a thickness‐dependent average saturation magnetization, which is far below that of bulk material for very thin films. Furthermore, the extent of this agreement strongly suggests the absence of any significant surface anisotropy or an inhomogeneous demagnetizing field caused by surface roughness in such films. However, a series of complementary experiments shows that this large decrease of average saturation magnetization cannot be simply explained by an oxidation process.Keywords
This publication has 11 references indexed in Scilit:
- Evidence for Partial Surface Spin Pinning in Ferromagnetic ResonanceJournal of Applied Physics, 1971
- Comment on ``p-Type Conduction in Li-Doped ZnSe''Applied Physics Letters, 1971
- Preferential Oxidation of Fe in Permalloy FilmsApplied Physics Letters, 1971
- Theory of Surface-Spin Pinning in Ferromagnetic ResonancePhysical Review Letters, 1969
- Flat Ferromagnetic, Epitaxial 48Ni/52Fe(111) Films of few Atomic LayersPhysica Status Solidi (b), 1968
- Spontaneous Magnetization in Thin Films of NickelJournal of the Physics Society Japan, 1961
- Sättigungsmagnetisierung und Anisotropiefeldstärke in dünnen EisenaufdampfschichtenThe European Physical Journal A, 1961
- Saturation Magnetization of Nickel Films of Thickness Less Than 100 APhysical Review B, 1959
- Ferromagnetic Resonance in Ultra-Thin FilmsJournal of Applied Physics, 1958
- Thin Films of Ferromagnetic MaterialsReviews of Modern Physics, 1953