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  • 1995-1999  (5)
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  • 1
    Electronic Resource
    Electronic Resource
    Effects of orientation on the time decay of magnetization for cobalt–alloy thin film media (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 4997-4999 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The dependence of the time decay of magnetization on orientation ratio was investigated for longitudinal Co–alloy thin film media. The coercivity orientation ratio was controlled by the degree of mechanical texture. For oriented samples, it was found that the remanent magnetization along the circumferential direction decayed faster with time than that along the radial direction when the applied reverse magnetic field was near the remanent coercivity. However, the remanent magnetization along the circumferential direction decayed more slowly with time than that along the radial direction when the applied reverse magnetic field was less than roughly half the remanent coercivity. Anisotropic interactions and magnetic anisotropy distributions appear to be the cause for the different time decay of magnetization along the circumferential and radial directions for oriented media. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370070
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  • 2
    Electronic Resource
    Electronic Resource
    Giant magnetoresistance in Fe/Mo multilayers formed by magnetron sputtering (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 1816-1818 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Fe/Mo multilayers have been prepared by magnetron sputtering. Giant magnetoresistance (GMR) has been found in the samples with an antiferromagnetic interlayer coupling. The magnetoresistance (MR) ratio exceeds 12% at 4.2 K, and it oscillates as a function of Mo spacer thickness. The oscillation period is about 10–12 A(ring), which is consistent with the case of the reported Kerr effect. The results suggest that the presence of antiferromagnetic coupling and the absence of GMR are the result of the sharp interfaces, and that relatively rough interfaces and moderately thin Fe layer thickness are the key factors for enhancing MR in the sputtered films. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358880
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  • 3
    Electronic Resource
    Electronic Resource
    Enhanced temperature effect on magnetoresistance in Fe/Mo multilayers : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 4782-4784 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have observed an enhancement of the temperature effect on magnetoresistance (MR) in Fe/Mo multilayers with the increase of the Mo layer thickness. MR at the first antiferromagnetic maximum is large and insensitive to the temperature whereas at the third antiferromagnetic maximum it is small and relatively sensitive to the temperature. We found that the mean free path of the conduction electrons increased with the increase of the Mo layer thickness at a fixed temperature and it decreased very slightly with the increase of the temperature at a fixed Mo layer thickness. The interlayer coupling, similar to MR, also has an enhanced temperature effect with the increase of the Mo layer thickness. There is a scaling relationship between the temperature effect on saturation field Hs and MR, which suggests that the decrease of the interlayer coupling strength is responsible for the enhanced temperature effect on MR. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365462
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  • 4
    Electronic Resource
    Electronic Resource
    Interlayer coupling in NiFe/Mo multilayers and effect of Fe underlayer : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 4785-4787 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report our studies of exchange coupling in NiFe/Mo multilayers with and without Fe underlayer. The interlayer coupling of NiFe layers across the Mo spacer as well as the magnetic exchange coupling between Fe underlayer and the NiFe/Mo multilayers were observed: The interlayer coupling in NiFe/Mo multilayers exhibits the typical oscillations as a function of the Mo spacer with a period of about 11 Å, and the magnetic exchange coupling between Fe underlayer and the NiFe/Mo multilayers is strongly dependent on the thickness of the Mo spacer tMo and the bilayer number N of NiFe/Mo multilayers. For the [NiFe(20 Å)/Mo(tMo)]30 samples with a 100 Å Fe underlayer, the hysteresis loops with thinner Mo spacer (tMo〈4 Å) are single loops indicating that the Fe underlayer is strongly magnetic exchange coupled with the NiFe/Mo multilayers; whereas hysteresis loops with thicker Mo spacer (tMo≥5 Å) show a two-magnetic-phase feature. For the [NiFe(20 Å)/Mo(10 Å)]30 sample with 100 Å Fe underlayer, the hysteresis loops are single loops for bilayer number N〈15, while hysteresis loops show the two-phase feature for N≥15. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365463
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  • 5
    Electronic Resource
    Electronic Resource
    Comment on the hadronic decay of excited heavy quarkonia (1999)
    Springer
    The European physical journal 7 (1999), S. 61-63 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We make comments on [1], and provide partial wave analysis to the decays of excited heavy S-wave $1^-$ quarkonia into the basic $1^-$ quarkonia state plus $\pi\pi$ . It is revealed that there exist contributions of D-wave transition in $\psi'\longrightarrow J/\psi\pi\pi$ , $\Upsilon(2S)\longrightarrow \Upsilon(1S) \pi \pi$ and $\Upsilon(3S)\longrightarrow \Upsilon(1S) \pi \pi$ by using the data-fitting results in [1]. A possible experimental method to measure the D-wave directly is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100529800979
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