Journal ArticleDOI
On the origin of uniaxial anisotropy in permalloy thin films
TLDR
In this article, the authors investigated the origin of the induced anisotropy in evaporated Permalloy films of the composition ranging from 70-to 90-percent Ni, and the compositional dependence of contributions from each origin can be used in order to elucidate the whole mechanism of the anisotropic in detail.Abstract:
Variation of H k during isothermal magnetic annealing has been systematically investigated to make clear the origin of the induced anisotropy in evaporated Permalloy films of the composition ranging from 70- to 90-percent Ni. The anisotropy of films deposited at room temperature comes from six different origins, whose activation energies are E_{1} eV (0.17-0.2 eV), E_{2} \simeq E_{3} \simeq 0.5 eV, E_{4} \simeq E_{5} \simeq 1.1 eV, and E_{6} = 2.0 eV, respectively. The compositional dependence of contributions from each origin can be used in order to elucidate the whole mechanism of the anisotropy in detail. The component of activation energy from 0.2 to 0.5 eV is closely related to the magnetoelastic anisotropy, while that of 1.1 eV is almost independent of the film composition. The component with the activation energy of 2.0 eV proved to be the same as that found in bulk Permalloy. Furthermore, the effects of the preparation condition of films on the anisotropy are also discussed.read more
Citations
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Journal ArticleDOI
Annealing behavior of electroplated permalloy thin films
TL;DR: The isochronal annealing behavior of electroplated 1.2 µm Ni-Fe thin films containing 80 wt% Ni, in the temperature range from 373° to 773°K, and with a magnetic field parallel to the easy axis of the films, was investigated in this paper.
Journal ArticleDOI
Shape-induced ultrahigh magnetic anisotropy and ferromagnetic resonance frequency of micropatterned thin Permalloy films
TL;DR: In this article, the magnetic anisotropy of a bar-shaped Permalloy strip was observed after 30 min postannealing at 400°C in the absence of external magnetic field.
Journal ArticleDOI
Induced uniaxial magnetic anisotropy field in very thin NiFe and CoZrNb films
TL;DR: In this paper, the induced uniaxial anisotropy field in thin permalloy and CoZrNb films was investigated, and it was found that the easy axis of Ni/sub 79/Fe/sub 21/ films thinner than 20 nm was switched to the field direction by annealing with a magnetic field perpendicular to the easy axes of the as-deposited films, even at a low annoaling temperature of 160/spl deg/C. It is likely that the rearrangement of atom pairs can easily occur in the surface
Journal ArticleDOI
Effect of magnetic annealing on plated permalloy and domain configurations in thin-film inductive head
A.S. Kao,P. Kasiraj +1 more
TL;DR: In this article, the magnetic annealing behavior of NiFe films in the temperature range from 100 to 500 degrees C was investigated through characterization of the structural properties of full films and the domain configurations of films shaped like an inductive-head yoke.
Journal ArticleDOI
Switching field interval of the sensitive magnetic layer in exchange-biased spin valves
Th. G. S. M. Rijks,R. F. O. Reneerkens,R Reinder Coehoorn,J.C.S. Kools,Murray F. Gillies,J. N. Chapman,W. J. M. de Jonge +6 more
TL;DR: In this article, the switching field interval of Ni-Fe-Co-based thin films and spin-valve layered structures, sputter-deposited on a Ta-buffer layer, was studied.
References
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Journal ArticleDOI
On the Origin of Magnetic Anisotropy Induced by Magnetic Annealing
Sōshin Chikazumi,Tatsurō Oomura +1 more
TL;DR: In this article, the magnitude of magnetic anisotropy induced by magnetic annealing was measured as a function of composition for iron-nickel alloys and it was shown that the magnitude is proportional neither to the magnetostriction nor to the saturation magnetization.
Journal ArticleDOI
Uniaxial Magnetic Anisotropy Induced in Fe–Ni Alloys by Magnetic Anneal
TL;DR: In this article, the uniaxial magnetic anisotropy induced in iron-nickel alloys by a magnetic anneal has been determined as a function of the composition, annealing temperature and duration.
Journal ArticleDOI
On the Origin of M-Induced Anisotropy in Nickel and Permalloy Films†
TL;DR: In this article, an analysis of the HK-isotherms and of the temperature dependence of HK gives the spectrum of HK-contributions of a given film with their relaxation times and activation energies.
Journal ArticleDOI
Origin of the Periodic Component of Anisotropy Dispersion in Ni-Fe Thin Films
TL;DR: In this article, it was shown that the periodic component mainly comes from the randomly oriented magneto-elastic energy of the crystallites corresponding to the stress of about 3×109 dyn/cm2.
Journal ArticleDOI
Origin of the Periodic Component of Anisotropy Dispersion in Ni-Fe Films II
TL;DR: In this paper, the periodic component of the angular dispersion α90 was measured on Ni-Fe films of various compositions deposited onto glass substrates kept at different temperatures, and the anisotropic part of the stress σa estimated from α90 depends on the substrate temperature as σ a~(300-ts)×107(dyn/cm2).
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