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
  • 1
    Electronic Resource
    Electronic Resource
    Neutron scattering and magnetization clouds in dilute Pd based alloys : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5242-5244 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Neutron scattering data for dilute PdMn, PdCo, and PdFe alloys show forward peaks at small values of K, which indicate an inhomogeneous distribution of the magnetization in these alloys. These inhomogeneities indicate the existence of magnetization clouds that produce the ferromagnetism in these materials; the shape of the peaks at small K also suggest a quasielastic contribution to the neutron diffuse scattering. We, therefore, calculated the neutron scattering cross sections for these alloys using a local moment model; we also developed an analytic expression for the magnetization clouds that can be compared with experimental results. The calculations were made using Monte Carlo methods in the dilute alloy region of impurity concentration. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361298
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Ferromagnetic ordering in dilute PdCo alloys : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 7137-7139 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The analysis of magnetization and neutron-scattering measurements shows that the ferromagnetic cloud in dilute PdCo alloys has a size of 7.92μB, with a Co moment of 2.02μB, for a range of concentrations of 0.3≤c≤2.0 at. % Co. Using the values obtained by our analysis of the data, the neutron scattering and the critical temperatures of ferromagnetism are reproduced using a localized magnetic moment model with a Heisenberg type of interaction between clouds and Monte Carlo simulation methods. The calculated neutron scattering shows a strong component of critical scattering in the unpolarized neutron; this component is the cause of the larger value of the ferromagnetic cloud (∼10μB) that can be inferred from the neutron scattering. Agreement is also found between calculated critical temperatures and experimental Tc's at these values of concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.356703
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Magnetic and atomic order in dilute Pd and Pt based alloys : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 5669-5670 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Unpolarized magnetic neutron scattering data, from dilute PdFe, PtCo, PtFe, and PdMn alloys, have been analyzed using a magnetic environmental model and Monte Carlo simulation methods. The neutron scattering shows large forward peaks at low K values due to the magnetization clouds and to the presence of critical scattering. The effects of atomic short range order, when present, were also included in the analysis. The analysis allows the calculation of the neutron diffuse scattering and the determination of the critical temperatures of the ferromagnetism in the alloys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353585
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Ferromagnetism and critical temperatures in dilute PdMn alloys : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 6138-6140 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Neutron-scattering and magnetization measurements on dilute PdMn alloys have been analyzed using a magnetic environment model of ferromagnetism, atomic short-range order, and Mn-Mn interactions. The analysis allows the calculation of several magnetic properties of PdMn, and the effects of Mn-Mn interactions and atomic short range order on the critical temperatures of ferromagnetism. These temperatures, which are small in dilute PdMn alloys in comparison with other typical giant moment systems such as PdFe, were calculated using the Monte Carlo simulation method, and the results were compared with experimental values, showing good agreement for the concentrations considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348783
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Magnetic effects of atomic short-range order on PdMn alloys (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 4735-4737 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic properties of a material are affected by the type of atomic order present in the sample. In particular, the atoms of one kind change their magnetic behavior depending on the composition of its first-neighbor shell. The analysis of magnetic samples by neutron diffuse scattering allows us to separate the atomic short-range order component from the magnetic component, but simultaneously we can study the correlations that affect the magnetic properties of materials. Using neutron-scattering data, we have analyzed the atomic short-range order in several samples where the host is Pd and the impurity is Mn. This analysis allows us to see the effects that this order has on the magnetic properties. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370464
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Magnetic moment correlations in transition metal alloys determined by neutron scattering : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 4192-4194 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Pd and Pt have been shown to be highly polarizable when mixed with ferromagnets like Ni, Fe, and Co. In these alloys the total moment, or magnetization cloud, is produced by the magnetic moment plus the induced moment on the surrounding atoms. With diffuse magnetic scattering of neutrons, it is possible to measure these magnetization clouds, M(K), as Fourier transform of the moments; M(K) represents the site occupation magnetic moment correlation. We consider that the atoms of the matrix polarize around the atoms of the impurity, following the orientation of its moments and forming giant moments. To compare with experimental data, we obtained an expression for the magnetic moments assuming a local magnetic environment. We then developed an expression for the magnetization cloud that includes the total moment associated with a giant moment, M(0), determined by magnetization measurements; we used M(0)=dμ/dc, where μ is the average moment of the alloy and c the impurity concentration, to establish a relation between neutron and magnetization measurements. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365117
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Fractoemission during crack propagation in glass (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 57 (1990), S. 246-248 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The phenomenon termed fractoemission was monitored in soda-lime-silica glass specimens during slow crack growth. No electron, ion, or photon signals were detected until crack velocities reached approximately 10−2 m/s. These observations suggest that the more intense fractoemissions observed during fast fracture are due to dissipation of the excess energy associated with unstable crack growth, but more significantly that fractoemissions are not fundamental to crack propagation in glass.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.103704
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Muonium formation in xenon and argon up to 60 atmospheres (1991)
    Springer
    Hyperfine interactions 65 (1991), S. 801-809 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Results of muon polarization studies in xenon and argon up to 60 atm are reported. In argon for pressures up to 10 atm, the muon polarization is best explained by an epithermalcharge exchange model. Above this pressure, the decrease inP D and increase inP L are ascribed to charge neutralization and spin exchange reactions, respectively, in the radiolysis track. Measurements with Xe/He mixtures with a xenon pressure of 1 atm indicate that the lost polarization in the pure xenon at this pressure is due to inefficient moderation of the muon. As the pressure in pure xenon is increased above 10 atm, we find thatP L remains roughly constant andP D begins to increase. The lost fraction may be due to the formation of a XeMu Van der Waals type complex, whileP D is ascribed to XeMu+ formation. This suggests that spur processes appear to be less important in xenon than in argon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02397731
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Positive muon slowing down times in Ar measured by the μSR technique (1991)
    Springer
    Hyperfine interactions 65 (1991), S. 793-799 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The phase information of triplet muonium signals has been used to measure the slowing down times of the positive muon in Ar. The results agree well with calculated stopping power based on proton data with the assumption that the positive muon and proton have the same stopping power at the same projectilew velocity (velocity scaling).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02397730
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Interaction of muonium with oxygen on silica powder surfaces (1991)
    Springer
    Hyperfine interactions 65 (1991), S. 811-817 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Results of the first μSR studies using Merck FO Optipur silica powder, which contains paramagnetic impurities at the ppb level and has a surface area of 610±20 m2/g. are reported. Above 20 K, the transverse field muonium relaxation rate is roughly constant at 0.5 μs−1. Upon the addition of oxygen at ppm levels, the relaxation rate increases linearly with O2 concentration in the temperature range from 40–100 K yielding two-dimensional depolarization rate constants on the order of 10−4 cm2 molecule−1 s−1. As the temperature is increased further, both oxygen and muonium desorb from the surface yielding a three-dimensional rate constants at 300 K of 3.1(3)×10–10−10 cm3 molecule−1 s−1, in agreement with the gas phase value. Longitudinal field measurements suggest that MuO2 is formed and is able to spin exchange with other oxygen molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02397732
    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...