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Magnetic Properties of Co-Fe-Si-B Microwires

100%

Kwapuliński P., Gieraltowski J., Dolabdjian C., Stokłosa Z., Haneczok G.

Acta Physica Polonica A

2017

vol. 131

issue 5

1256-1259

In the paper the magneto-impedance effect in the Co_{68.15}Fe_{4.35}Si_{12.55}B_{15} microwire with diameter of about 100 μ m is carefully studied. The measurements in close contact and contactless geometry were carried out in the static field ranging from 0 to 6 kA/m and frequencies of the alternating field from 20 Hz to 2 MHz. It is shown that the examined microwire shows high anisotropy of soft magnetic properties i.e. the circumferential permeability is at least 7 times higher than the longitudinal one. Moreover, the microwire can be used as highly sensitive magneto-impedance sensor working in contactless geometry especially at fields below 200 A/m.

Thermal Evolution of Magnetic Interactions in Ni Nanowires Embedded in Polycarbonate Membranes by Ferromagnetic Resonance

73%

Ghaddar A., Gieraltowski J., Gloaguen F., Żuberek R., Aleshkevych P., Kazmierczak J., Slawska-Waniewska A., Szymczak H.

Acta Physica Polonica A

2009

vol. 116

issue 6

1039-1043

Ni polycrystalline nanowires with diameters of 50, 80, and 100 nm were electrodeposited in cylindrical pores of track-etched polycarbonate membranes. Their magnetic properties were determined as a function of temperature using ferromagnetic resonance and magnetization measurements. At room temperature, the uniaxial anisotropy is equal to the shape anisotropy whereas an additional contribution is evidenced at low temperature. This additional contribution is attributed to magnetoelastic effects induced in the nanowires due to the different thermal expansion constants of Ni and polycarbonate. The analysis of magnetization processes in Ni nanowire arrays evidenced strong dipolar interactions inside the wires due to the domain structure. The coercive field of the nanowires was shown to be nearly a linear function of the temperature and could be accounted for temperature dependence of the uniaxial anisotropy.

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2 Acta Physica Polonica A

1 2017

1 2009

2 Gieraltowski J.

1 Aleshkevych P.

1 Dolabdjian C.

1 Ghaddar A.

1 Gloaguen F.

1 Haneczok G.

1 Kazmierczak J.

1 Kwapuliński P.

1 Slawska-Waniewska A.

1 Stokłosa Z.

1 Szymczak H.

1 Żuberek R.

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Magnetic Properties of Co-Fe-Si-B Microwires

Thermal Evolution of Magnetic Interactions in Ni Nanowires Embedded in Polycarbonate Membranes by Ferromagnetic Resonance