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  • 1
    Electronic Resource
    Electronic Resource
    Variation of magnetism and structure on mechanically alloyed Fe40Co10Cu50 powder with process time and heat treatment : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 5799-5801 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effects of milling time and heat treatment on local structural changes during mechanical alloying Fe40Co10Cu50 have been investigated by means of x-ray diffraction (XRD), neutron diffraction technique, vibrating sample magnetometer, and Mössbauer spectroscopy. Mössbauer spectroscopy showed that two kinds of magnetic phases coexist in the mechanically alloyed powder, which is in agreement with XRD and neutron diffraction study. One is corresponding to α-Fe and the other is a new magnetic phase formed during mechanical alloying. With increasing processing time, the new magnetic phase becomes more ordered and dominant. Mössbauer spectrum from the annealed sample consists of ferromagnetic component with a hyperfine field of 36.2 T and a paramagnetic component. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.364672
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  • 2
    Electronic Resource
    Electronic Resource
    Domain wall jaggedness induced by the random anisotropy orientation in magneto-optic materials: A computer simulation study (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 4260-4264 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Computer simulations of magnetic domain structure in thin films of amorphous rare-earth transition metal magneto-optic recording media are performed. In these simulations, the recording media are two-dimensional lattice of 64×64 magnetic moments with a lattice distance of 10 A(ring). The motion of the magnetic moments follows the dynamic Landau–Lifshitz–Gilbert (LLG) equation under the influence of an effective field arising from the local anisotropy, nearnest-neighbor exchange, classical dipole–dipole interaction, and an external applied field. Within the constraints of the LLG equation, we have investigated the process of domain wall formation for a medium with random anisotropy orientation. Even for very small randomness of anisotropy orientation, it is found that the 2π-Bloch wall line appears at the boundaries of magnetic domains and the domain wall is jagged. Finally, the effects of exchange stiffness coefficient Ax and anisotropy coefficient Ku on the wall width and the jaggedness which measured the straightness of domain wall are studied. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361794
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  • 3
    Electronic Resource
    Electronic Resource
    Microstructure and magnetic properties of Cu0.8(Fe1−xCox)0.2 alloy powders manufactured by a mechanical alloying process : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5476-5478 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Changes in structural and magnetic properties during mechanical alloying and heat treatment were studied in Cu0.8(Fe1−xCox)0.2 (x=0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6) alloys using x-ray diffractometry, transmission electron microscopy, and magnetometry. Supersaturated solid solutions with a fcc crystal structure were obtained in all alloys by mechanical alloying. The grain sizes of the solid solutions were about 20 nm. Magnetization of the supersaturated solid solutions could be explained by a mixture of two types of particles showing paramagnetism and ferromagnetism. The variation in magnetization with Co content in the solutions was similar to the Slater–Pauling curve. Fe–Co with a bcc structure precipitates during annealing of the Cu0.8Fe0.1Co0.1 alloy. With increasing annealing temperature ferromagnetic behavior becomes dominant due to a coarsening of the precipitates. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362280
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  • 4
    Electronic Resource
    Electronic Resource
    Permeability and giant magnetoimpedance in Co69Fe4.5X1.5Si10B15 (X=Cr, Mn, Ni) amorphous ribbons (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 7218-7220 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetoimpedance (MI) has been measured in the amorphous ribbons of the soft ferromagnetic alloy Co69Fe4.5X1.5Si10B15 (X=Cr, Mn, Ni) as functions of frequency (f ). For all of the three samples, at low frequency, f≤5 MHz, the MI ratio increases with increasing frequency, but the MI ratio decreases at high frequency, f≥5 MHz. The MI profiles are not changed at low frequency regions of f≤1 MHz in the amorphous ribbons. The MI ratio at high frequency of f=5 MHz becomes 57% in Co69Fe4.5Cr1.5Si10B15, but the MI ratio becomes 30% in Co69Fe4.5Mn1.5Si10B15 and Co69Fe4.5Ni1.5Si10B15. The MI ratio at f=10 MHz becomes 45% in Co69Fe4.5Cr1.5Si10B15 and the MI ratio becomes 23% in Co69Fe4.5Mn1.5Si10B15 and Co69Fe4.5Ni1.5Si10B15, respectively. The maximum values of field sensitivity are 2.7(X=Cr), 2.5(X=Mn), 2.2(X=Ni)%/Oe for f=5 MHz. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1359226
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  • 5
    Electronic Resource
    Electronic Resource
    Asymmetric giant magnetoimpedance in annealed amorphous (Co0.94Fe0.06)72.5Si12.5B15 wire under the circumferential field (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 5266-5268 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The permeability spectra and asymmetric giant magnetoimpedance (GMI) have been measured in annealed amorphous Co-based wire under the circumferential field produced by the bias current. The permeability from the wall motion of core domains is nearly constant; however, the permeability from rotational magnetization of shell domains increases with bias current. The asymmetric GMI profile is revealed for the bias current over 4.5 mA, due to the influence of unidirectional bias field on the wall motion in the circumferential direction, and maximum field sensitivity is observed for the bias current of 4.5 mA. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.373316
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  • 6
    Electronic Resource
    Electronic Resource
    Dynamic finite-size effect in the two-dimensional classical XY model : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 3986-3988 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Explicit dynamic finite-size scaling in the time-dependent correlation functions for the two-dimensional classical XY model is explored. The dynamic scaling method, proposed by us previously, is utilized for finding the time scaling variables of the model. It shows nontrivial dynamic finite-size scaling behavior near and below TKT for the total spin correlation function. Since the model is critical for all temperatures below TKT, the time scaling exponent is markedly different from that of the three-dimensional classical XY model at short times. There also appears to be another dynamic scaling region with a different time scaling exponent at T≤TKT for a fairly wide intermediate time interval. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.364915
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  • 7
    Electronic Resource
    Electronic Resource
    Structure and magnetic properties of a Fe–Zr–N thin film : The 7th joint MMM-intermag conference on magnetism and magnetic materials (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 6646-6648 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Fe–Zr–N thin films were deposited in an argon and nitrogen mixed atmosphere using a rf magnetron reactive sputtering apparatus at room temperature. The x-ray diffraction pattern of the Fe76Zr8N16 thin film obtained at room temperature indicates that the as-sputtered film consists of amorphous and crystalline phases. The mixed structure of the sample was also confirmed by the temperature dependence of the saturation magnetic flux density. The as-sputtered film exhibited soft magnetic properties with a saturation magnetic flux density of 1.1 T and effective permeability of 1400 or more at 1 MHz. The film also showed good thermal stability, sustaining the effective permeability of 3000 at temperatures up to 550 °C. The film annealed in a magnetic field of 500 Oe at 450 °C showed a permeability of 2200 or more up to 40 MHz. The conventional Mössbauer spectrum of the kapton substrate sample obtained at room temperature could be fitted by a mixture of three kinds of six-line hyperfine splittings. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.367931
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  • 8
    Electronic Resource
    Electronic Resource
    Magnetic field dependence of flux pinning force in a high Tc Bi1.6Pb0.4Sr2Ca2Cu3Oy superconductor (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 2423-2425 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The flux pinning force in a Bi1.6Pb0.4Sr2Ca2Cu3Oy high Tc superconductor was obtained from the angular dependence of magnetization of the sample in fields from 150 to 1000 Oe at 80 K. The pinned fluxoid rotates with the sample like a rigid body at low fields. With further increase in the magnetic field H, the angular dependence of field-cooled magnetization disappears gradually above a critical rotation angle δ. This feature has been analyzed by the balance of two different kinds of opposing torques acting on the flux lines. Flux pinning force per unit length calculated from the torque balance under the external fields between 150 and 1000 Oe is about 10−3 dyn/cm at 80 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.110495
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  • 9
    Electronic Resource
    Electronic Resource
    Influence of Annealing Temperature on Magnetic Properties in Co-Based Amorphous Ribbons (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 449-452 (Mar. 2004), p. 1049-1052 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The magnetic properties were investigated on Co66Fe4B15Si15 amorphous ribbons ofannealed at temperature range from 473 K to 773 K in vacuum (A-batch) and open air (B-batch).Static permeability from domain wall motion decreases with annealing temperature both in A- andB-batch sample. The permeability from magnetization rotation increases up to 700 K annealingtemperature, but then decreases. The GMI profiles show a symmetric curve in A-batch samplesirrespective of annealing temperature. In B-batch samples, symmetric profiles are shown up to 650 Kannealing temperature, while they becomes asymmetric for further annealing temperature, due to theexchange bias-field induced by surface crystalline layer
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/08/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.449-452.1049.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Temperature Dependence of Magnetoimpedance Effect in Amorphous Fe〈sub〉83〈/sub〉B〈sub〉9〈/sub〉Nb〈sub〉7〈/sub〉Cu〈sub〉1〈/sub〉 Alloy (2001)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 373-376 (Aug. 2001), p. 525-528 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/05/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.373-376.525.pdf
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