Thermal stability of the in-plane magnetic anisotropy and the coercivity of nanocrystalline CoFeNi films

2003 ◽  
Vol 266 (3) ◽  
pp. 251-257 ◽  
Author(s):  
E.H. du Marchie van Voorthuysen ◽  
F.T. ten Broek ◽  
N.G. Chechenin ◽  
D.O. Boerma
Keyword(s):  
Thermal Stability ◽  
Magnetic Anisotropy ◽  
Thermal Stability Of

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.

Effects of the Co-Presence of Conflicting Magnetic Anisotropy in Ba Ferrite Particles

2010 ◽  
Vol 67 ◽  
pp. 108-112
Author(s):  
Giancarlo Bottoni
Keyword(s):  
Thermal Stability ◽  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Low Temperatures ◽  
Magnetocrystalline Anisotropy ◽  
Shape Anisotropy ◽  
Recording Media ◽  
Magnetization Switching ◽  
Crystalline Anisotropy ◽  
Thermal Stability Of

In Ba ferrite particles magnetocrystalline and shape anisotropies are contemporarily present and conflicting. The strength and evolution of the two anisotropies are studied, through the dependence of the anisotropy constants on temperature. While in pure Ba ferrite particles the anisotropy is uniaxial at all temperatures, since the magnetocrystalline anisotropy clearly prevails on shape anisotropy, in particles modified for employment in recording media the two anisotropies are comparable and at low temperatures the shape anisotropy result stronger than the crystalline anisotropy. Besides the irregular shape of the particles introduces further preferred directions for the magnetization. The Co/Ti-doped particles show a multiple axes anisotropy. The macroscopic magnetic properties are found in relationship with the evolution of the anisotropy. Also the influence that the presence of such multiple anisotropy has on the magnetization switching and on the thermal stability of the magnetization of the Ba ferrite particles is analyzed.

Contribution of the magnetic anisotropy of the stabilization layer to the thermal stability of synthetic ferrimagnetic media

2002 ◽  
Vol 80 (1) ◽  
pp. 85-87 ◽  
Author(s):  
B. Ramamurthy Acharya ◽  
Antony Ajan ◽  
E. Noel Abarra ◽  
Akihiro Inomata ◽  
Iwao Okamoto
Keyword(s):  
Thermal Stability ◽  
Magnetic Anisotropy ◽  
Thermal Stability Of

Dynamic measurement of the thermal stability of the magnetic anisotropy in FeTaN films

2000 ◽  
Vol 87 (9) ◽  
pp. 5849-5851 ◽  
Author(s):  
S. C. Byeon ◽  
J. Rantschler ◽  
C. Alexander ◽  
W. D. Doyle ◽  
J. A. Barnard ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Magnetic Anisotropy ◽  
Dynamic Measurement ◽  
Thermal Stability Of

Thermal stability of pinned synthetic ferrimagnets with perpendicular magnetic anisotropy

2004 ◽  
Vol 95 (11) ◽  
pp. 7163-7165 ◽  
Author(s):  
J. Sort ◽  
B. Rodmacq ◽  
F. Garcia ◽  
S. Auffret ◽  
B. Dieny
Keyword(s):  
Thermal Stability ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
Thermal Stability Of

Thermal stability of magnetic anisotropy of stress-annealed amorphous alloy Fe3Co67Cr3Si15B12

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-139-Pr2-141 ◽  
Author(s):  
N. V. Dmitrieva ◽  
G. V. Kurlyandskaya ◽  
A. P. Potapov ◽  
V. A. Lukshina
Keyword(s):  
Thermal Stability ◽  
Amorphous Alloy ◽  
Magnetic Anisotropy ◽  
Thermal Stability Of
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