Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1990-1994  (8)
  • 1985-1989  (3)
Source
Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    FMR studies of magnetic properties of Co and Fe thin films on Al2O3 and MgO substrates : The 6th joint magnetism and magnetic materials (MMM)-intermag conference (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 6096-6098 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of substrates on the magnetic properties has been studied for Co and Fe films both on Al2O3 (112¯0) and MgO (001) substrates by using ferromagnetic resonance techniques. For Fe(001)/MgO(001) samples the thickness dependence of the magnetocrystalline constant and of the effective magnetization values have been determined from the in-plane angular variation of the resonance field H0. Different reasons for the thickness dependencies of these parameters are discussed. For Co(111)/Al2O3(112¯0) the angular variation of H0 exhibits an uniaxial anisotropy, for which several causes are discussed. For Co(112¯0)/MgO(100) a four-fold in-plane anisotropy was observed which is due to the twinned structure of these samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358538
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Anisotropy studies of AFM coupled MBE grown Co/Cu(001) superlattices : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6184-6186 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have studied the anisotropy behavior of antiferromagnetically (AFM) coupled fcc Co/Cu(001) sandwiches and superlattices. Magneto-optical Kerr effect measurements on samples with Cu film thicknesses in the range of the second antiferromagnetic maximum reveal characteristic shapes of the hysteresis loops in close agreement with theoretical predictions. For the AFM coupled samples we infer antiparallel spin orientations in remanence perpendicular to the originally applied magnetic field direction. Changing the magnetic layer thickness and maintaining a constant thickness of the spacer completely alters the shape of the hysteresis loops. The loops of weakly coupled AFM layers show characteristic steps, indicative for a rather unusual nonsymmetric spin state. This behavior can be explained by the competing effects of anisotropy with the exchange coupling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355450
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Anisotropy studies of molecular-beam-epitaxy-grown Co(111) thin films by ferromagnetic resonance : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6492-6494 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic anisotropy of Co/Cu(111) thin films has been investigated using the ferromagnetic resonance (FMR) technique. The films were prepared by molecular-beam epitaxy in ultrahigh vacuum on sapphire substrates with niobium as a buffer layer. In situ RHEED investigations, ex situ x-ray low-angle reflectivity measurements, and high-angle Bragg scans confirm the structural quality of the films. Angular dependent FMR measurements are performed in the plane of the films and out-of-plane. The angular dependence of the line positions in-plane shows a competition between the sixfold anisotropy, which is expected for bulk Co, and a twofold anisotropy contribution. It is demonstrated that by FMR one can detect even small values of the higher-order anisotropy terms. In the analysis, we put emphasis on the relationship between magnetic and structural properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.356974
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Erasure in particulate and thin-film disk media (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 4037-4039 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetic recording signals have been written, and subjected to erasure by external magnetic fields, on a variety of longitudinally oriented rigid particulate and thin-film disks. In general, plated thin-film disks are easier to erase than particulate disks, and particulate disks are easier to erase than sputtered thin-film disks. Decaying alternating (ac) erase fields induce greater erasure for a given peak field than do single-direction (dc) erase fields. Successive ac erasures, using the same erase field, induce greater erasure than single ac erasures; while successive dc erasures applied in the same direction do not induce greater erasure than a single dc field erasure. Successive dc erasures where the applied field direction is reversed after each erase application induce additional erasure, but are not as effective as the same number of ac erasures. Erase fields in excess of the disk coercivity induce reductions in signal amplitude, which are attributed to a region of irreversible magnetization switching, and to a region of irreversible approach to saturation as the effects of magnetic inhomogeneities are overcome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338547
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Structural and magnetic properties of Co/Cr(001) superlattices : 38th Annual Conference On Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6421-6423 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Epitaxial Co/Cr(001) superlattices were prepared by Molecular-Beam-Epitaxy (MBE). The crystal structure was determined both with Reflection High Energy Electron Diffraction (RHEED) and x-ray diffraction experiments. The Co layers grow in an hcp phase with their (11.0) planes oriented parallel to the Cr(001) planes. The magnetic anisotropy was measured using the Magneto-optical Kerr Effect (MOKE) and Ferromagnetic Resonance (FMR) technique. It is found that the easy axis of the magnetization is perpendicular to the film plane below a Co thickness of about 14 A(ring). The value of the interface anisotropy constant Ks is determined to (0.85±0.1)erg/cm2 assuming the bulk magnetization of hcp Co.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355371
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Photothermally modulated ferromagnetic resonance investigations of epitaxially grown thin films (abstract) : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6508-6508 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Photothermally modulated (PM) ferromagnetic resonance (FMR) is applied, for the first time, to locally investigate the magnetic anisotropy of thin epitaxially grown Fe and Co films. The PM-FMR measurements were performed at 9.2 GHz in an optical cavity. The microwave resonance absorption was thermally modulated by an intensity modulated laser beam and the change of the microwave power reflected at the cavity was synchronously detected by a lock-in amplifier. By focusing the laser beam a lateral resolution of 20 μm could be achieved. The PM-FMR signal was studied as a function of the position of the laser spot on the film, of the modulation frequency (10 Hz–10 MHz) and of the temperature. The PM-FMR measurements were complemented by temperature (5–700 K) and angle dependent conventional FMR studies. The temperature variation of the PM-FMR and its comparison with the behavior of the conventional signal yields evidence for a signal generation process of the PM-FMR that is governed by anisotropy effects. Therefore the local variation of the PM-FMR signal was used to deduce the lateral inhomogeneity of the magnetic anisotropy in the plane of the films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.356929
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Investigation of the photothermally modulated ferromagnetic resonance signal from magnetostatic modes in yttrium iron garnet films (1993)
    Springer
    Applied physics 57 (1993), S. 545-551 
    Details
    ISSN: 1432-0630
    Keywords: 76.50 ; 75.00 ; 65.90
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The conventional and photothermally modulated (PM) ferromagnetic resonance (FMR) of magnetostatic modes (MSM) in yttrium iron garnet (YIG) films have been investigated as a function of temperature. Approaching the ferrimagnetic transition at T c=560 K a strong enhancement of the PM-FMR signal amplitude is observed which is accompanied by a change of the signal shape. The observations are discussed in the framework of a model that takes into account the temperature derivatives of those quantities that contribute to the high-frequency susceptibility. At temperatures still below T c a paramagnetic line emerges. The MSM disappear in a state of finite magnetization which is explained on the basis of damping of the MSM being important in the vicinity of the magnetic phase transition. Additionally, frequency and power dependent measurements are presented and the imaging ability of PM-FMR is demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331757
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Experimental Beta-decay energies of very neutron-rich fission products with 107≦A≦109 (1989)
    Springer
    The European physical journal 334 (1989), S. 239-245 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Dr ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Theβ-decay of neutron-rich fission products with mass numbersA=107, 108 and 109 has been investigated at the mass separator LOHENGRIN of the Institute Laue-Lange-vin (ILL) in Grenoble by measuringβγ-coincidences with a large plastic scintillator telescope and a Ge(I)-detector. Theβ-decay energies of 8 nuclei were obtained from the evaluation of more than 40β-endpoint energies. For the nuclei107 Mo,107Tc,108Tc,109Tc and109Ru, theβ-decay energies were determined for the first time; the experimental error in the decay energy of three daughter nuclei was considerably reduced. In addition, the two-neutron separation energies and the nuclear mass excesses were calculated from these experimentalQ β-values and compared with different mass predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284550
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Experimental beta-decay energies of very neutron-rich isobars with mass numbers A=101 and A=102 (1992)
    Springer
    The European physical journal 342 (1992), S. 125-132 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Dr ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract TheQ β-values of101Rb,101,102Sr and101,102Y have been measured for the first time at the mass separator ISOLDE by means ofβγ-coincidence techniques with a plastic scintillation detector telescope and a large Ge(HP)-detector. For some of these nuclei, also new details of their decay schemes could be derived from the measuredβ-decay properties. The experimental results are discussed, as far as the systematics of two-neutron separation energies derived from them is concerned. In addition, the nuclear masses deduced from theseQ β-values are compared with the predictions of recent mass calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01288459
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Beta decay energies and nuclear masses of148Ba,148La and151Pr (1990)
    Springer
    The European physical journal 336 (1990), S. 247-252 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Dr ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Theβ-decay energy of the neutron-rich isotopes148Ba,148La and151Pr has been measured at the Institute Laue-Langevin (ILL). The148Ba- and148La-nuclei were produced using a high-temperature ion source at the OSTIS separator of this institute, whereas samples of151Pr were obtained from the thermal fission of239Pu, used as a target in the mass separator LOHENGRIN. At both instruments,βγ-coincidences were measured with a plastic scintillator telescope and a Ge(I)-detector, together withβ-singles andγ-singles spectra. Theβ-spectra emitted in coincidence with 44γ-lines in the decay of these nuclei have been evaluated. From their endpoint energies, the followingQ β -values have been obtained:Q β (148Ba)=5115±60keV;Q β (148La)=7255±55 keV;Q β (151Pr)=4170±75 keV. Using these results, the nuclear massesA of these nuclei can be calculated with a relative error ΔA/A≃5·10−7. In addition, the two-neutron separation energies and the mass excesses have been derived; the results are compared with recent predictions of theoretical mass calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292853
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...