Low temperature magnetization of sputtered amorphous FeNiB films

Lenge, N.; Kronmüller, H.

doi:10.1002/pssa.2210950232

Cited by 41 publications

(27 citation statements)

References 24 publications

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“…In fact, various functional forms to the approach to saturation are found in these materials, with 1/√H, 1/H and 1/H 2 dependencies for varying types of defect. [37][38][39][40] A similar behavior was also observed in crystalline thin films of magnetic oxides and intermetallics, where the presence of antiphase boundaries results in a slow approach to saturation for the spins at the boundary. 41,42 However, in these cases, the slow approach to saturation consists of a large fraction of the total moment relative to what we observe in Ni 80 Fe 20 .…”

Section: Discussionsupporting

confidence: 59%

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Precise determination of the spectroscopic g-factor by use of broadband ferromagnetic resonance spectroscopy

Shaw

Nembach

Silva

et al. 2013

Journal of Applied Physics

134

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We demonstrate that the spectroscopic g−factor can be determined with high precision and accuracy by broadband ferromagnetic resonance measurements and applying an asymptotic analysis to the data. Spectroscopic data used to determine the g−factor is always obtained over a finite range of frequencies, which can result in significant errors in the fitted values of the spectroscopic g−factor. We show that by applying an asymptotic analysis to broadband datasets, precise values of the intrinsic g−factor can be determined with errors well below 1 %, even when the exact form of the Kittel equation (which describes the relationship between the frequency and resonance field) is unknown. We demonstrate this methodology with measured data obtained for sputtered Ni 80 Fe 20 ("Permalloy") thin films of varied thicknesses, where we determine the bulk g−factor value to be 2.109 ± 0.003. Such an approach is further validated by application to simulated data that includes both noise and an anisotropy that is not included in the Kittel equation that was used in the analysis. Finally, we show a correlation of thickness and interface structure to the magnitude of the asymptotic behavior, which provide insight into additional mechanisms that may induce deviations from the Kittel equation.2

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Section: Discussionsupporting

confidence: 59%

“…[37][38][39][40] In such cases, M eff is a function of the applied magnetic field until the sample reaches full saturation. The inset of Fig.…”

Section: Discussionmentioning

confidence: 99%

Precise determination of the spectroscopic g-factor by use of broadband ferromagnetic resonance spectroscopy

Shaw

Nembach

Silva

et al. 2013

Journal of Applied Physics

134

View full text Add to dashboard Cite

show abstract

“…1) and quasidislocation dipoles (Fig. 2) [34][35][36]. Free volumes and quasidislocation dipoles in amorphous alloys can be treated like point defects and linear defects in crystalline materials, respectively.…”

Section: Theoretical Introductionmentioning

confidence: 99%

“…Free volumes and quasidislocation dipoles in amorphous alloys can be treated like point defects and linear defects in crystalline materials, respectively. [34][35][36] In magnetic fields above the effective anisotropy the magnetizations can be described with the formula (1) [37]:…”

Section: Theoretical Introductionmentioning

confidence: 99%

Effect of structural relaxations within the amorphous structure on the magnetic properties of amorphous tapes from FeCoB family

Szota

2017

Archives of Metallurgy and Materials

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The paper presents the research results for the Fe 78 Co 2 Si 9 B 11 amorphous alloy, and after the process of annealing resulting only in the relaxation of the material. The structure relaxations occurring in the volume of test samples lead to the changes in their magnetic and mechanic properties. Therefore the studies on the effect of the structure defects on the properties of these type of materials are important. Understanding the processes occurring during the magnetizing of amorphous alloys can be helpful in the design of modern functional materials for special purposes. The main purpose of this elaboration was to determine the effect of the amorphous structure defects in the state after solidification and after heat treatment on the changes in the magnetizing process and in such parameters as the saturation magnetization and the coercivity field.

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“…A more complicated situation occurs in the presence of a pseudo-dislocation dipole, where the arrangement of individual vectors is not collinear and the centers of the deformation of these vectors are hooked at the dipole ends. [11][12][13] Ferromagnetic materials, especially the ones based on the Fe-Co-B composition are well known for their great soft-magnetic properties, in particular a low coercive field and magnetostriction while they are not expensive and have a high sensitivity to alloying additives. In the compounds of this type, iron is typically the major part (more than a 50 % amount fraction) while Co, which has similar properties, allows an increase in the magnetization.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the structural-defect influence on the magnetization process in and above the Rayleigh region

Gruszka¹

2016

Mater. Tehnol.

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The paper presents studies of the structural-defect influence on the magnetization process in low magnetic fields (H < 0.4 Hc) and above the Rayleigh range. The investigated Fe62Co10Y8B20 alloy samples were obtained with the injection casting method resulting in the amorphous-structure state, which was confirmed with XRD. The studies were conducted by analyzing the disaccommodation of the magnetic-susceptibility process and using Kronmüller's theory in the approach to the ferromagnetic saturation area. On the basis of the obtained results, it was found that the main factor responsible for the processes of magnetization in low magnetic fields are point defects, whereas in the case of high magnetic fields, the magnetization process depends mainly on second-type pseudo-dislocation dipoles. Keywords: metallic glasses, defects, disaccommodation, Kronmüller's theorŷ lanek predstavlja {tudij vpliva strukturnih defektov na proces magnetizacije v {ibkem magnetnem polju (H < 0,4 Hc) in nad Rayleigh podro~jem. Vzorci preiskovane zlitine Fe62Co10Y8B20 so bili izdelani z metodo injekcijskega brizganja, kar je povzro~ilo amorfno strukturo, ki je bila potrjena z rentgensko analizo (XRD). [tudije so bile izvedene z analizo procesa neustreznosti magnetne ob~utljivosti in z uporabo Kronmülerjeve teorije pri pribli`evanju feromagnetno nasi~enemu podro~ju. Na osnovi dobljenih rezultatov je bilo ugotovljeno, da so pri procesu magnetizacije glavni faktor to~kaste napake, medtem ko je v primeru magnetizacije v mo~nem magnetnem polju proces odvisen predvsem od druge vrste psevdodislociranih dipolov.

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Low temperature magnetization of sputtered amorphous FeNiB films

Cited by 41 publications

References 24 publications

Precise determination of the spectroscopic g-factor by use of broadband ferromagnetic resonance spectroscopy

Precise determination of the spectroscopic g-factor by use of broadband ferromagnetic resonance spectroscopy

Effect of structural relaxations within the amorphous structure on the magnetic properties of amorphous tapes from FeCoB family

Analysis of the structural-defect influence on the magnetization process in and above the Rayleigh region

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