Evolution of the magnetic anisotropy and magnetostriction in Co-based amorphous alloys microwires due to current annealing and stress-sensory applications

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.

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Creep-induced magnetic anisotropy in amorphous alloys: Kinetics and equilibrium values

IEEE Transactions on Magnetics ◽

10.1109/tmag.1985.1064025 ◽

1985 ◽

Vol 21 (5) ◽

pp. 2005-2007 ◽

Cited By ~ 10

Author(s):

T. Jagielinski ◽

T. Egami

Keyword(s):

Magnetic Anisotropy ◽

Amorphous Alloys ◽

Induced Magnetic Anisotropy

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

Textures and Microstructures ◽

10.1155/tsm.32.281 ◽

1999 ◽

Vol 32 (1-4) ◽

pp. 281-287 ◽

Cited By ~ 1

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.

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Short range order in (Fe, Co, Ni)75Si15B10 amorphous alloys determined from magnetic anisotropy

Solid State Communications ◽

10.1016/0038-1098(85)90760-4 ◽

1985 ◽

Vol 54 (12) ◽

pp. 1059-1063 ◽

Cited By ~ 33

Author(s):

A. Hernando ◽

V. Madurga ◽

J.M. Barandiarán ◽

O.V. Nielsen

Keyword(s):

Magnetic Anisotropy ◽

Amorphous Alloys ◽

Short Range ◽

Short Range Order ◽

Range Order

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Effect of Current Annealing on Domain Wall Dynamics in Bistable FeCoMoB Microwires

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.233-234.281 ◽

2015 ◽

Vol 233-234 ◽

pp. 281-284 ◽

Cited By ~ 4

Author(s):

Peter Klein ◽

Rastislav Varga ◽

Vladimir Komanicky ◽

Giovanni Badini-Confalonieri ◽

Manuel Vázquez

Keyword(s):

Magnetic Field ◽

Domain Wall ◽

Magnetic Anisotropy ◽

Temperature Stability ◽

Electrical Current ◽

Domain Wall Dynamics ◽

Higher Temperature ◽

Current Annealing

We have studied effect of current annealing on domain wall dynamics of FeCoMoB microwires. It was showed that 10 minutes of current annealing corresponds to 1 hour of classical annealing in furnace. Moreover, electrical current flowing through microwire produces Oersted magnetic field and therefore circular magnetic anisotropy is induced during annealing. As a result, induced circular magnetic anisotropy prefers vortex domain wall with velocities up to 3 km/s that can be observed in the current annealed nanocrystalline FeCoMoB microwires with much higher temperature stability.

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The precipitation of nanocrystalline structure in the joule heated Fe72Al5Ga2P11C6B4 metallic glasses

Journal of Mining and Metallurgy Section B Metallurgy ◽

10.2298/jmmb110719018m ◽

2012 ◽

Vol 48 (2) ◽

pp. 319-324 ◽

Cited By ~ 2

Author(s):

N. Mitrovic ◽

S. Kane ◽

S. Roth ◽

A. Kalezic-Glisovic ◽

C. Mickel ◽

...

Keyword(s):

Metallic Glasses ◽

Amorphous Alloys ◽

Amorphous Matrix ◽

Annealing Treatment ◽

Nanocrystalline Structure ◽

Heating Power ◽

Cast State ◽

Current Annealing ◽

Residual Amorphous Matrix ◽

Crystalline Component

In this study, the evolution of the nanostructure on dc Joule heated Fe72Al5Ga2P11C6B4 metallic glass ribbons have been investigated. Heating power per square area (PS) was ranging between 0.8 to 7.1 W/cm2 in order to get various stages of relaxation or nanocrystallization. The crystallization starts after applying PS ? 4.35 W/cm2 and the sample consist of residual amorphous matrix, a magnetic crystalline component and also a non-magnetic crystalline component (relative abundance of Fe in the crystalline phase is about 35 %). XRD measurements show that crystalline samples after current annealing consist of Fe3B, FeC, FeP and Fe3P compounds. On TEM micrograph a broad distribution of shapes and sizes is noticed, the latter range from about 60 to 350 nm, increasing by applied heating power. The decrease of the electrical resistivity after each current annealing treatment is rather small in comparison with other Fe-based amorphous alloys (only about 1.5 % for the highest PS). Partial nanocrystallization leads to increase of coercive field (from HC ? 7 A/m in the amorphous as-cast state up to 45 A/m) attributed to precipitation of magnetically harder compounds (Fe3B and FeC).

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