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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 5814-5816 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effects of the exciting magnetic field as well as of the bias magnetic field applied at the exciting or receiving points for Fe77.5Si7.5B15 amorphous magnetostrictive wire, used as delay lines, have been investigated. Amorphous wires have been tested in the as-cast state and after the stress-relief process. The increase in the value of the exciting magnetic field leads to an increase in the value of the pulsed voltage output. The maximum values for the pulsed voltage output are obtained for about 5 μs pulse width and 15 A amplitude of the pulsed exciting current. The dependence of pulsed voltage output on the bias magnetic field at the exciting or receiving points is not monotonic for all tested samples. The maximum response is obtained for about 100–200 A/m and 100–300 A/m bias magnetic field applied in exciting and receiving points, respectively. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 5817-5819 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present a study of the evolution of the magnetic properties and behavior of Fe73.5Cu1Nb3Si13.5B9 glass covered wires and wires after glass removal with the annealing temperature up to 600 °C starting from the amorphous state. The changes induced in the magnetic properties of these wires are determined by the stress relief process occurring at temperatures below 550 °C, and by the appearance of the nanosized α-FeSi crystalline grains after annealing for 1 h at 550 °C. The nanocrystalline phase formation leads to an improvement of the soft magnetic properties of these wires—increase of permeability and decrease of the coercive force—but also determines the disappearance of the large Barkhausen effect presented by these wires in the amorphous state. Annealing at temperatures over 550 °C determines a depreciation of the soft magnetic properties of both glass covered wires and wires after glass removal. The magnetic behavior of such wires can be fully explained by taking into account the relaxation of the internal stresses with increasing the annealing temperature as well as the changes in the magnetostriction constant due to the appearance of the nanocrystalline grains. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 4816-4818 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The distribution of the magnetic anisotropy in the surface region of amorphous glass-covered wires with positive and nearly zero magnetostriction is analyzed by means of microwave absorption ferromagnetic resonance (FMR). The surface layer of as-cast positive magnetostrictive amorphous glass-covered wires displays an axial anisotropy, which changes to radial after partial or complete removal of the glass cover. The as-cast nearly zero magnetostrictive amorphous glass-covered wires display a circumferential anisotropy in their surface layer, its direction being maintained even after partial or complete glass removal, but its strength slightly increases with glass removal. The results are explained by taking into account the most recent results on the domain structure of these wires, as well as the skin effect that occurs at microwave frequencies. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 5338-5340 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Nd8Fe73Co5Hf2B12 alloys were cast as strips (thick continuous ribbons with thickness t=100–160 μm) by a chill disk melt spinning technique (vdisk=3 m/s) from a master alloy prepared by arc melting (A) and from two prealloyed components (B). Samples obtained by the B procedure revealed in the as-cast state, good magnetic properties with an unusually high value of the coercivity, Hc=10.3 kOe, for the substoichiometric Nd2Fe14B system. A high degree of structural refinement and a homogeneous dispersion of the phases are attained in sample B. The strength and type of magnetic interactions between the grains are presented by δM and irreversible susceptibility plots. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 5344-5346 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Results concerning linear variable differential transformer (LVDT) displacement measurements using Fe77.5Si7.5B15 amorphous wires as movable core are presented. Taking advantage of the large Barkhausen (LBE) effect in amorphous wire, a small exciting field and a small number of windings in the secondary coils are necessary to get an large output signal of the LVDT. The thermal noise of the output becomes low, due to the small number of coil turns, increasing thus the sensitivity of the LVDT. The results obtained show a linear dependence of the LVDT response on the displacement of the moving core for displacements up to about 14 mm, with accuracy of 1 μm. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 5453-5455 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetization processes in amorphous glass-covered wires with positive (Fe based), negative (Co based), and nearly zero magnetostriction (Co based with a small amount of Fe addition) are analyzed by ferromagnetic resonance (FMR) measurements. A second peak in the low field range of the derivative resonance spectra has been observed for all samples. A clear relationship between the shape of this peak and the type of magnetization process that occurs in these wires was found. The obtained results show that FMR measurements offer new possibilities of investigating the magnetization processes in amorphous glass-covered wires. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 5729-5731 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This article presents results concerning inverse Wiedemann effect (IWE) dependence on the torsion applied along the Fe77.5Si7.5B15 glass covered amorphous wires tested before and after glass removal. In the absence of torsion during measurements, the IWE voltage is zero for amorphous wires tested in the as-cast state. In the same condition of measurements a small spontaneous IWE voltage appears for wires after glass removal annealed without torsion, and the voltage reaches its maximum value for torsion annealed wires both before and after glass removal. Increasing the torsion's value during measurements, for as-cast wires and wires annealed without torsion, the value of the induced voltage increases until it reaches a maximum while for torsion annealed wires a small increase is observed followed by a strong decrease down to that torsion value at which the thermal treatment was performed. In the case of torsion annealed wires a good linearity of the torsion response was obtained for a given range of torsions which depends on the sample's state (before and after glass removal). The obtained results suggest the possibility to use IWE in Fe77.5Si7.5B15 glass covered amorphous wires in torque sensors. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 6628-6630 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Nd8Fe77Co5B6CuNb3 amorphous ribbons were obtained by the melt spinning method using a large range of the wheel circumferential speed (18–40 m/s). For 10 min time of heat treatment at 700 °C the following values of the magnetic characteristics were achieved: Hc=3.95 kOe, Br=11.25 kG, and (BH)max=15 MGOe. The 13% increase of the remanent ratio Mr/M1.5 T by applying a magnetic field during annealing suggests an improvement of the exchange coupling effect. The Curie temperature of both hard and soft magnetic component phases increases with about 50 °C due to the Co content but it is not affected by the magnetic field annealing. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 6584-6586 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We investigate the evolution of the magneto-impedance (MI) response of Fe73.5Cu1Nb3Si13.5B9 glass-covered wires with the annealing temperature, starting from the as-cast amorphous state up to 600 °C. As-cast FeCuNbSiB amorphous glass-covered wires display a MI ratio of about 1%, this value increasing with the annealing temperature to about 5% for 550 °C when the nanocrystalline phase appears. For wires which have had the glass removed, the MI ratio increases from 5% for the as-cast amorphous state up to 28% after the appearance of the nanocrystalline phase. The MI is larger than that found in CoFeSiB amorphous wires after glass removal. Annealing over 550 °C leads to a decrease of the MI ratio for both glass-covered samples and samples with the glass coating removed. The results demonstrate the role of soft magnetic properties on the sensitivity of the MI effect. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Thin Solid Films 103 (1983), S. 253-256 
    ISSN: 0040-6090
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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