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  • 1
    Electronic Resource
    Electronic Resource
    Two-magnon scattering in iron-rich metallic glasses
    Amsterdam : Elsevier
    Journal of Magnetism and Magnetic Materials 31-34 (1983), S. 1597-1598 
    Details
    ISSN: 0304-8853
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0304-8853(83)91030-2
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  • 2
    Electronic Resource
    Electronic Resource
    The growth of magnetic Fe overlayers on sulphur passivated GaAs(100) : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 4954-4956 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This paper describes a new approach for producing epitaxial Fe overlayers on GaAs(100), which prevents the intermixing of the semiconductor elements in the overlayer. This is accomplished by sulphur passivation of the substrate surfaces in an aqueous ammonium sulphide solution prior to Fe deposition. bcc Fe(100) is observed to grow epitaxially on S/GaAs(100) substrates, with most of the S floating out as an ordered overlayer. No evidence of semiconductor interdiffusion into the Fe overlayer is observed. The Fe overlayers are observed to be ferromagnetic, with easy axes along the [010] directions. A uniaxial in-plane anisotropy is observed, in addition to the expected fourfold anisotropy, which is attributed to the bonding geometry at the interface. The saturation magnetization of these overlayers is found to be close to that of bulk Fe. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361601
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  • 3
    Electronic Resource
    Electronic Resource
    Interface alloying at Fe/Cr interfaces and its role in exchange coupling, angular resolved Auger electron, magneto-optic Kerr effect, and Brillouin light scattering studies (invited) : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 4518-4523 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Angular resolved Auger electron studies were carried out for Fe whisker/Cr(001) interfaces which were prepared at 100, 180, 246, and 296 °C. The Cr atoms penetrate progressively into the second (counting from the surface) atomic layer at 100, 180, and 246 °C. At 296 °C the Cr atoms enter the third atomic layer. No noticeable fraction of the Cr atoms was found in the fourth atomic layer. The exchange coupling was studied in Fe whisker/Cr/Fe(001) films which were grown in a nearly perfect layer by layer mode. Magneto-optic Kerr effect and Brillouin light scattering measurements showed that the measured change in the phase of the short wavelength oscillations, the presence of a slowly varying exchange coupling bias, and the small measured values of exchange coupling are caused by the same mechanism: interface alloying. The exchange coupling in Fe whisker/Cr/nFe specimens, for n=10, 20, 30, and 40 ML, showed no obvious dependence on the Fe layer thickness. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361768
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  • 4
    Electronic Resource
    Electronic Resource
    Magnetic anisotropies in single and multilayered structures (invited) : The 5th Joint MMM−Intermag Conference (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 5769-5774 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ultrathin magnetic metallic structures provide a variety of systems in which unique magnetic properties can be engineered. The investigation of magnetic anisotropies in ultrathin structures has brought exciting results to the basic studies of magnetism in systems with reduced dimensionality and to the engineering of new magnetic materials. Molecular-beam epitaxy (MBE) techniques turned out to be particularly useful in the formation of new stable and metastable structures whose sharply defined interfaces, lattice relaxations, and lattice reconstructions have resulted in a wide range of interesting magnetic properties. In this presentation the present authors' recent studies of single and multilayered structures composed of bcc Fe(001), bcc Cu(001), lattice-expanded Pd(001), fcc Co(001), and fcc Cu(001) will be summarized. Besides presenting their interesting magnetic properties the following techniques will be highlighted: reflection high-energy electron diffraction (RHEED) and ferromagnetic resonance (FMR). RHEED patterns and RHEED intensity oscillations were used to monitor the MBE growths. It will be shown that RHEED studies provide an effective way to characterize the quality of growth which can then be correlated with the observed magnetic properties. It will be shown that the FMR technique is extremely useful in determining all of the basic magnetic parameters. The role of interfaces, lattice relaxations, and proximity effects on the in-plane fourfold and perpendicular uniaxial anisotropies will be discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350156
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  • 5
    Electronic Resource
    Electronic Resource
    Magnetic properties of MBE structures using fcc Co/Cu(001) and bcc Fe/Cu(001) (abstract) : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5217-5217 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have used ferromagnetic resonance and surface magneto-optic Kerr effect to investigate the magnetic anisotropies in face-centered-cubic fcc Cu/Co/Cu(001) structures. We have found that Cu/Co/Cu structures possess large magnetic anisotropies. The twofold perpendicular anisotropy results in a strong easy plane (4πMeff = 4πMs + Hu ∼ 40 kOe). The perpendicular uniaxial anisotropy is only weakly dependent on Co film thickness. Hu = 25.4, 23.7, and 17.7 kOe in 3- , 4- , and 10-ML-thick Co films, respectively. The twofold perpendicular anisotropy in fcc Co/Cu/Cu structures is caused by the lateral expansion and vertical contraction of fcc Co(001) ultrathin films. The in-plane fourfold anisotropy in fcc Cu/Co/Cu(001) structures has its easy axis along the [110] crystallographic direction. The fourfold in-plane anisotropy is large (2K1/Ms ∼ 1 kOe) and weakly dependent on Co film thickness. Fe(001) can be grown epitaxially on fcc Co(001) and results in a significant change in the magnetic properties. In Cu/4Co/3Fe/Cu(001) multilayer (integers describe the number of ML) the perpendicular anisotropy changes its sign and is very weak (Hu = −1.5 kOe). The in-plane fourfold anisotropy is also appreciably decreased (2K1/Ms = 0.4 kOe). Cu/4Co/6Cu/〈b〉4Co〈e〉/Cu(001) trilayers are coupled antiferromagnetically. However, this coupling is smaller (J=−0.07 ergs/cm2) compared to bcc Fe/Cu/Fe structures. The exchange coupling in Co/Cu/Co trilayers depends strongly on details of the total structure, e.g., the sample Cu/4Co/6Cu/〈b〉4Co〈e〉/3Fe/Cu is ferromagnetically coupled (J∼0.1 ergs/cm2). The exchange coupling in bcc Fe/Cu/Fe(001) trilayers oscillates with increasing Cu thickness (oscillatory period of 10 ML). However, no evidence of symmetric oscillations was found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348082
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  • 6
    Electronic Resource
    Electronic Resource
    The role of interfaces in the magnetoresistance of Au/Fe/Au/Fe/GaAs(001) (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 7110-7112 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The electron transport and magnetoresistance (MR) were investigated in high quality crystalline epitaxial Fe(001) and Au(001) films and exchange coupled Au/Fe/Au/Fe/GaAs(001) trilayer structures. Fits to the experimental data were based on the semiclassical Boltzmann equation, which incorporates the electronic properties obtained from first-principles local density functional calculations. The fits require a surprisingly high asymmetry for the spin dependent electron lifetimes in Fe, τ↓/τ↑=10 at room temperature. Despite the large atomic terraces at the Au/vacuum and Fe/GaAs interfaces the scattering at the outer interfaces was found to be diffuse. The origin of MR in Au/Fe/Au/Fe/GaAs(001) structures is due to electron channeling in the Au spacer layer. The measured MR is consistent with the diffusivity parameters s↑=0.55, s↓=0.77 at the metal–metal interfaces. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1357844
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  • 7
    Electronic Resource
    Electronic Resource
    Ferromagnetic resonance in ultrahigh vacuum of bcc Fe(001) films grown on Ag(001) (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 5334-5336 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ferromagnetic resonance studies carried out in ultrahigh vacuum at 16.88 GHz on bcc Fe (001) films 5–14.2 monolayers (ML) thick grown on Ag (001) substrates indicate that an ultrathin Fe film 5 ML thick should be magnetized perpendicular to the specimen plane at room temperature. Covering the bare Fe specimens with Ag causes a substantial reduction in the uniaxial surface anisotropy for all Fe film thicknesses and would put the moment of a 5-ML film back into the plane. For a given Fe film thickness, the maximum obtainable uniaxial surface anisotropy depends on both the amount of oxygen contamination in the film and on the surface roughness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342362
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  • 8
    Electronic Resource
    Electronic Resource
    Ferromagnetic antiresonance transmission through pure iron at 73 GHz (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 3811-3813 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic damping in pure iron has been studied over the temperature range 140–300 K using a single-crystal slab l5 μm thick. The results at room temperature are consistent with the accepted value of the damping parameter for iron of G=0.7×108 Hz. The damping increases as the temperature is reduced and reaches a value of approximately 1.4×108 Hz at 140 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340622
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  • 9
    Electronic Resource
    Electronic Resource
    Anisotropic ferromagnetic resonance linewidth in nickel at low temperatures (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 3693-3695 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have measured the ferromagnetic resonance linewidth ΔH at 24 GHz in (110) nickel disks at 4 K and from 60 K to room temperature. Samples had a nominal purity of 99.99% and a residual resisitivy ratio of 40. The applied field was in the plane of the sample and measurements were made with the field along each of the three principal axes [100], [110], and [111]. We find ΔH[110] 〉ΔH[111] and ΔH[100] for temperatures below 200 K. At 4 K we found ΔH[100] =1600±50 Oe, ΔH[111] =1800±50 Oe, and ΔH[110] =2000±50 Oe.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.334992
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  • 10
    Electronic Resource
    Electronic Resource
    Role of interfaces in the exchange coupling of Fe/Cr/Fe(001) systems : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 4350-4352 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Exchange coupling has been studied in Fe whisker/Cr/Fe(001) systems that were grown in a perfect layer by layer mode. The exchange coupling through Cr was found to be very sensitive to alloying at the Fe whisker/Cr(001) interface. It will be shown that the observed reversed phase of the short wavelength oscillations compared to those predicted by ab initio calculations can be caused by alloying at the Fe whisker/Cr(001) interface. In order to test this point, we have grown samples with the Cr/Fe(001) interface intentionally alloyed by codepositing the Cr and Fe atoms during the formation of the last Cr atomic layer. The strength of the exchange coupling has also been investigated in systems fabricated with heterogeneous spacers using bcc Cu(001) and fcc Ag(001). Cu and Ag layers have been inserted between the Cr spacer and the Fe(001) film. The strength of the antiferromagnetic coupling was found to be substantially increased due to the presence of Cu at the Cr/Fe(001) interface. It will be argued that the observed increase in the exchange coupling is caused by an increased asymmetry in spin dependent reflectivity at the Cr/Cu/Fe interface. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.364766
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