The Magnetic Anisotropy of Co-Base Amorphous Alloys

1991 ◽  
Vol 232 ◽  
Author(s):  
Wu-Xin Zhang ◽  
Xi-Ming Li ◽  
Nan-Ping Chen
Keyword(s):  
Magnetic Anisotropy ◽  
Amorphous Alloys ◽  
Induced Anisotropy ◽  
Pair Model ◽  
Mn Content ◽  
Stress Induced Anisotropy

ABSTRACT4 Co–base amorphous alloys prepared by rapid quenchling are stress–annealed under different temperature (Ta) balow its crytalline temperature Tcry, after pre–annealing. The effect of magnetic anisotropy with Ta shows the mechanism of stress–induced anisotropy is changed from single ionic modal to pair model as Ta inereases. The effect of Mn content may exaggerate the model changing.

scholarly journals Thermal Stability of Field- and Stress-Induced Anisotropy in Nanocrystalline Fe-Based and Amorphous Co-Based Alloys

1999 ◽  
Vol 32 (1-4) ◽  
pp. 281-287 ◽  
Author(s):  
N. V. Dmitrieva ◽  
V. A. Lukshina ◽  
G. V. Kurlyandskaya ◽  
A. P. Potapov
Keyword(s):  
Thermal Stability ◽  
Magnetic Anisotropy ◽  
Amorphous Alloys ◽  
Nanocrystalline Alloy ◽  
Induced Anisotropy ◽  
External Effects ◽  
Nanocrystalline And Amorphous ◽  
Induced Magnetic Anisotropy ◽  
Stress Induced Anisotropy ◽  
Thermal Stability Of

Thermal stability of induced magnetic anisotropy (IMA) was studied in a course of subsequent annealings without any external effects for already field- or stress-annealed specimens of the nanocrystalline Fe73.5Cu1Nb3Si13.5B9 and amorphous Fe3Co67Cr3Si15B12 alloys. For these alloys the dependence of IMA thermal stability on the magnitude of the IMA constant (Ku) and temperature of stress-annealing was investigated. For the nanocrystalline alloy thermal stability of field- and stress-induced anisotropy with identical Ku was compared. It was shown that nanocrystalline specimens with identical Ku values after field- or stress-annealing have identical thermal stability of IMA. This can point to a similarity of the mechanisms of IMA formation after field- or stress-annealings. Thermal stability of stress-induced anisotropy in the nanocrystalline alloy with Ku value less than 1000 J/m3 and the amorphous alloy with Ku less than 100 J/m3 depends on the value of Ku. For both stress-annealed nanocrystalline and amorphous alloys magnetic anisotropy induced at higher temperatures is more stable because more long-range and energy-taking processes take place at these temperatures.

Tailoring of magnetic anisotropy of Fe-rich microwires by stress induced anisotropy

2006 ◽  
Vol 384 (1-2) ◽  
pp. 1-4 ◽  
Author(s):  
A. Zhukov ◽  
V. Zhukova ◽  
V. Larin ◽  
J. Gonzalez
Keyword(s):  
Magnetic Anisotropy ◽  
Induced Anisotropy ◽  
Stress Induced Anisotropy

Stress‐induced anisotropy and permeability of magnetostrictive Co‐based amorphous alloys

1984 ◽  
Vol 55 (8) ◽  
pp. 3028-3032 ◽  
Author(s):  
K. Hayashi ◽  
M. Hayakawa ◽  
Y. Ochiai ◽  
H. Matsuda ◽  
W. Ishikawa ◽  
...  
Keyword(s):  
Amorphous Alloys ◽  
Induced Anisotropy ◽  
Stress Induced Anisotropy

Effect of the direction of field annealing on the stress + field induced magnetic anisotropy in Co–Fe–Ni amorphous alloys

1992 ◽  
Vol 7 (7) ◽  
pp. 1602-1605 ◽  
Author(s):  
J. González ◽  
J.M. Blanco
Keyword(s):  
Magnetic Anisotropy ◽  
Amorphous Alloys ◽  
Transverse Field ◽  
Longitudinal Field ◽  
Induced Anisotropy ◽  
Compositional Dependence ◽  
Induced Magnetic Anisotropy ◽  
Field Annealing ◽  
The Magnetic Field ◽  
Microscopic Origin

Compositional dependence of the stress + longitudinal field induced magnetic anisotropy (SLFA) in (Co1−xFex)75Si15B10 (0 ⋚ x ⋚ 1), (Co1−xNix)75Si15B10 (x = 0.22) and [Co1−x(Fe0.5Ni0.5)x]75Si15B10 (x = 0.20, 0.50, and 0.80) amorphous alloy ribbons has been studied. The magnetic field was applied parallel to the ribbon axis. Two mechanisms have been invoked in order to explain the microscopic origin of this anisotropy: the directional ordering of atomic pairs, and the tetrahedral holes like 3Co–1Fe and 1Co–3Fe. The last contribution is found to be similar both in its direction and its value with respect to that obtained for stress + transverse field induced anisotropy (STFA) in the same compositions containing Fe, while in the Co–Ni samples only the first contribution is responsible for the SLFA, depending on its direction for the field annealing.

scholarly journals A hyperelastic model for soils with stress-induced and inherent anisotropy

2021 ◽  
Author(s):  
Marcin Cudny ◽  
Katarzyna Staszewska
Keyword(s):  
Small Strain ◽  
Induced Anisotropy ◽  
Dynamic Simulations ◽  
Inherent Anisotropy ◽  
Directional Model ◽  
Model Response ◽  
Hyperelastic Model ◽  
Stress Induced Anisotropy ◽  
Stress Invariant ◽  
Independent Model

AbstractIn this paper, modelling of the superposition of stress-induced and inherent anisotropy of soil small strain stiffness is presented in the framework of hyperelasticity. A simple hyperelastic model, capable of reproducing variable stress-induced anisotropy of stiffness, is extended by replacement of the stress invariant with mixed stress–microstructure invariant to introduce constant inherent cross-anisotropic component. A convenient feature of the new model is low number of material constants directly related to the parameters commonly used in the literature. The proposed description can be incorporated as a small strain elastic core in the development of some more sophisticated hyperelastic-plastic models of overconsolidated soils. It can also be used as an independent model in analyses involving small strain problems, such as dynamic simulations of the elastic wave propagation. Various options and features of the proposed anisotropic hyperelastic model are investigated. The directional model response is compared with experimental data available in the literature.

Anisotropy Energies and Critical Behavior of Ultrathin Ni(111) Films Grown on Smooth and Rough W(110) (invited)

1991 ◽  
Vol 231 ◽  
Author(s):  
Yi Li ◽  
K. Baberschke
Keyword(s):  
Magnetic Properties ◽  
Curie Temperature ◽  
Film Thickness ◽  
Critical Exponent ◽  
Critical Behavior ◽  
Induced Anisotropy ◽  
Effective Anisotropy ◽  
Stress Induced Anisotropy ◽  
Surface Crystal

Abstract6 to 80 Å thin Ni(111) films were prepared on smooth and rough W(110) substrates in UHV and characterized by LEED and Auger spectroscopies. The measurements of the magnetic properties were carried out in situ by ferromagnetic resonance at 9 GHz between 300 and 600 K. We found that the effective anisotropies, which consist of surface, crystal, and stress induced anisotropy, increase with decreasing film thickness and temperature. The roughness of the substrate results in the drastic decrease of the effective anisotropy. This is attributed to the change of the surface structure and the stress within the Ni films. Furthermore we found that the Curie temperature Tc and the critical exponent β of Ni films on the smooth and rough substrates show no change.

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