ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
  • 1
    Electronic Resource
    Electronic Resource
    Local spin-density theory of interface and surface magnetocrystalline anisotropy: Pd/Co/Pd(001) and Cu/Co/Cu(001) sandwiches : 38th Annual Conference On Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6409-6411 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The interface magnetocrystalline anisotropy (MCA) of Cu/Co/Cu(001) and Pd/Co/Pd(001) sandwiches are investigated, employing our recently developed state tracking approach based on the full potential linearized augmented plane wave energy band method. The strong negative MCA energy for the Co monolayer is found to be decreased for Co/Cu, and even becomes positive for Co/Pd due to the interfacial hybridization, which reduces the spin orbit coupling (SOC) between the dxz,yz − dz2 pair at M¯.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355367
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Validity and the applicablity of magnetic-circular-dichroism sum rules for transition metals (invited) : 38th Annual Confrerence on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 5802-5806 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: X-ray magnetic-circular-dichroism (MCD) spectra are calculated using the thin film full potential linearized augmented plane wave energy band method for transition metal surfaces. Together with a model analysis, a clear physical insight is provided for this new and exciting phenomenon. The MCD sum rule for the orbital moments originally derived from a single ion model are found to be valid to within 5–10% even in the band approach which treats the strongly hybridized multiband structure. However, the spin sum rule may result in a larger error due to the effects of s,p−d hybridization. In addition, the magnetic dipole term is very important in the spin sum rule, especially for atoms with lower local symmetry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355570
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Magnetic anisotropy of ferromagnetic Fe and Co thin films (invited) (abstract) : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5215-5215 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The observation of transition-metal (TM) magnetic moments in thin films aligned perpendicular to the surface has focused theoretical and experimental attention on the origin of magnetic anisotropy in these exciting low-dimensional materials. In this paper we report on a study of the magnetic anisotropy of Fe and Co thin films originating from the spin-orbit interaction term of the fully relativistic Dirac equation. We employ a total energy second variation FLAPW method in which: (i) the electronic charge density is determined with the semirelativistic (no spin-orbit) FLAPW method; (ii) relativistic eigenvalues are calculated via a variational procedure using the semirelativistic wave functions as basis. The magnetic anisotropy energy of free-standing Fe(001) and Co(001) monolayers yields in-plane orientation of the spin moment. Semirelativistic calculations determined the magnetic moments of 1Fe/1Au, 1Fe/1Ag, or 1Fe/1Pd−all (001) slabs; the results agree well with those of monolayer Fe on thicker substrates. Magnetic anisotropy results1 for Fe monolayers on Au, Ag, and Pd(001) substrates give perpendicular anisotropy for these films, in agreement with experiment. Magnetic anisotropy calculations of Co thin films on CuPd and (001) and (111) substrates will also be presented. The origin of the magnetic anisotropy is discussed from a detailed analysis of the electronic structure (electronic bands, Fermi surface). Comparisons are given to the work of Gay and Richter and Fritsche et al.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348079
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Variation of the spin density at EF with oxygen adsorption: Fe(110) vs O/Fe(110) : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6739-6741 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The spin densities at the Fermi energy for the clean and oxygen adsorbed Fe(110) surfaces calculated using the full potential linearized augmented plane-wave method are found to differ substantially (in sign) from the energy-integrated total spin density previously given in the literature. The energy-sliced spin density becomes negative in the Fe(110) surface-vacuum region despite the enhancement of the surface magnetic moment and is reversed in sign, to positive, by the addition of a p(1×1) oxygen overlayer. Both results have been observed in a recent experiment using spin-polarized metastable atom deexcitation spectroscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352521
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Theoretical studies of the magneto-crystalline anisotropy: Monolayer Co : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6745-6747 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Using our newly developed state tracking method and eliminating the coupling between quasidegenerate pairs of states at the Fermi surface in advance, highly stable and precise results for the magneto-crystalline anisotropy energy are obtained for a Co monolayer film in a first principles calculation with a small number of k points (421 in the full Brillouin zone). The easy direction of magnetization is found to lie in the layer plane in contrast to the Fe monolayer when both match their lattice constant to the same Cu(001) substrate. This result is explained in terms of their electron occupation and differences in the spin-orbit coupling between their occupied and empty states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352523
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    CLEAN WATER ACT REAUTHORIZATION: HOW FAR HAVE WE COME? (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 30 (1994), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : This paper first presents a brief review of an earlier effort to estimate the benefits associated with achieving the Clean Water Act objectives. It then discusses what would be involved in doing a retrospective benefit-cost analysis of the Clean Water Act and some information on changes in several measures of water quality over the past 20 years. The paper concludes with a summary of a recent effort to estimate the realized benefits associated with the Clean Water Act and some implications for policy. (KEY TERMS: benefits; benefit-cost analysis; costs; recreation; water pollution; water quality.)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1994.tb03328.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Prediction of response with overlapping generations accounting for multistage selection (1991)
    Springer
    Theoretical and applied genetics 82 (1991), S. 329-336 
    Details
    ISSN: 1432-2242
    Keywords: Multistage selection ; Response ; Overlapping generations ; Dairy cattle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A generalization of Hill's equations predicting response to selection is developed that accounts for multiple stage selection in either or both sexes. The method accounts for the flow of genes for animals selected at later stages. This allows for the use of genetic gains from later stages, which explains the reduction in variance due to previous selection. Genetic gains from different selection differentials in each reproductive pathway are incorporated into the equations. The asymptotic response to a single cycle of selection is shown to agree with classical selection theory. The method is applied to a dairy progeny testing scheme representative of an artificial insemination organization in the USA. Two models were compared: (1) the first model accounted for two-stage selection of males, the first stage being based on pedigree information and the second stage on both pedigree and progeny test information; and (2) the second model assumed single-stage male selection. Selection was based on milk volume, milk fat, and milk protein yields. The predicted asymptotic rates for a single cycle of selection were overestimated by 6% and the cumulative response to continuous selection over 20 years was overestimated by 8% by assuming singlestage male selection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02190619
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Indirect methods for valuing changes in environmental risks with nonexpected utility preferences (1991)
    Springer
    Journal of risk and uncertainty 4 (1991), S. 153-165 
    Details
    ISSN: 1573-0476
    Keywords: risk ; benefit ; expected utility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract Theoretical models for estimating individuals' values for sure improvements in environmental quality are well developed. These models can be classified as being based on averting behavior, hedonic prices, or weak complementarity. Some of these models have also been applied to the task of valuing changes in risk based on expected utility theory. This article provides a systematic development of these models for changes in either the probability or the magnitude of an uncertain event and shows that the derived expressions for individual marginal willingness to pay can be generalized to nonexpected utility preferences as long as the index of preferences is continuous, convex, and twice differentiable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00056123
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Book reviews (1994)
    Springer
    Journal of economics 60 (1994), S. 209-228 
    Details
    ISSN: 1617-7134
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01227868
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    DynamicT 1 studies of gadolinium uptake in brain tumors using LL-EPI (1994)
    Springer
    Magnetic resonance materials in physics, biology and medicine 2 (1994), S. 409-412 
    Details
    ISSN: 1352-8661
    Keywords: fastT 1 mapping ; LL-EPI ; dynamic Gd uptake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Physics
    Notes: Abstract Using ultrafastT 1 mapping (LL-EPI), the uptake from a bolus injection of Gd-DO3A (ProHance) into the sagittal sinus and a brain tumor has been monitored. The measurement of absoluteT 1 removes the possible error in uptake curves created fromT 1-weighted sequences caused by changes inT 2 * and simplifies the calculation of ProHance concentration. The LL-EPI sequence has an acquisition time of 1.2 s and is repeated every 4 s to obtain uptake curves with a high temporal and spatial resolution. Optimization of the LL-EPI sequence has been performed to obtain a precision of 5% over theT 1 range 0.3–1.2 s.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01705285
    Location Call Number Expected 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...