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
Filter
  • Elsevier  (279)
  • American Physical Society  (82)
  • American Institute of Physics (AIP)  (55)
  • 2020-2024  (3)
  • 2000-2004  (172)
  • 1990-1994  (214)
  • 1960-1964  (27)
Collection
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Structural and magnetic ordering in iron oxide/nickel oxide multilayers by x-ray and neutron diffraction (invited) : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6886-6891 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Presented are studies of the magnetic and structural ordering in superlattices composed of Fe3O4 and NiO, and their study by a variety of techniques including x-ray and neutron diffraction, and SQUID magnetometry. X-ray diffraction indicates that structures with individual layer thicknesses down to 8.5 A(ring) grow as single crystals in registry with the substrate lattice with a layer-thickness-dependent tetragonal lattice distortion due to epitaxial and interfacial lattice mismatch. The lattice coherence of the Fe3O4 layers, however, is degraded by stacking faults between adjacent spinel layers. Neutron diffraction indicates that the NiO orders antiferromagnetically along the [111] direction with a magnetic coherence that extends over several superlattice bilayers, and the presence of an enhancement in the NiO Néel temperature in thin layered superlattices. These results are compared with SQUID magnetometry, which shows large anisotropy energies, but a lack of favored magnetization direction, indicating that the magnetic ordering in these systems is dominated by the exchange coupling across the interfaces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352425
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Transition metal implants in In0.53Ga0.47As (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 4222-4227 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Single- and multiple-energy Fe, Cr, and V ions were implanted into InGaAs. Annealing of the implanted InGaAs samples caused a redistribution of the implanted atoms, as determined by secondary ion mass spectrometry. Coimplantation of Fe with P did not prevent this redistribution. A transport equation calculation of Fe-implantation-induced stoichiometric disturbances in InGaAs was done. The lattice quality of implanted InGaAs was investigated by photoreflectance measurements. Fe-implanted InGaAs has a resistivity close to the intrinsic limit, whereas Cr- and V-implanted InGaAs have a lower resistivity than the unimplanted material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348393
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Characterization of the structural and magnetic ordering of Fe3O4/NiO superlattices grown by oxygen-plasma-assisted molecular-beam epitaxy : The 5th Joint MMM−Intermag Conference (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 6218-6220 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Oriented single-crystalline thin films of NiO and Fe3O4 and Fe3O4/NiO superlattices have been grown on cleaved and polished substrates of MgO(001) using oxygen-plasma-assisted molecular-beam epitaxy (MBE). We report the growth mode and structural characterization of these films using in situ RHEED and ex situ scanning electron microscopy and x-ray diffraction, and their magnetic characterization using SQUID magnetometry. Also reported are preliminary results of magnetotransport measurements. MgO has a very small lattice mismatch to the cubic rocksalt structure of NiO and to the half-unit-cell dimension of the spinel structure of Fe3O4. Pseudomorphic growth of superlattices consisting of alternating layers of NiO and Fe3O4 with repeat wavelength down to 17 A(ring) and of single thick layers of either of these materials are readily obtained. The grown films exhibit cubic single-crystalline symmetry in registry with the substrate, with sharp interfaces and strongly layer-thickness-dependent strain. RHEED pattern evolution in situ during growth indicates development of the rocksalt-like NiO and spinel Fe3O4 crystalline symmetries as each of the alternating layers of the superlattices are deposited. Magnetic hysteresis curves for superlattices with repeat wavelength less than 75 A(ring) exhibit a crossover from the conventional ferrimagnetic response expected of Fe3O4 found in longer wavelength superlattices and bulklike thick films to a more linear magnetic response that correlates strongly to the layer thickness dependence of lattice distortions and strain. Large magnetoresistance (6% at 55 kOe) is also observed for these short-wavelength superlattices, with the observed change in resistance nearly linear with field and with small hysteresis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350000
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Be, S, Si, and Ne ion implantation in InSb grown on GaAs (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 4228-4233 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Single- and multiple-energy Be, S, Si, and Ne ion implantations were performed at room temperature in InSb grown on semi-insulating GaAs substrates. The implanted material was subjected to both isochronal and isothermal annealing schemes. The as-implanted and annealed material was characterized by Hall, secondary ion mass spectrometry, and x-ray rocking curve measurements. The as-implanted material is highly n-type for all implant species used in this study. A maximum p-type activation of 90% and n-type activation of 16% was achieved for Be and S implants, respectively. Be activation depends on the thickness of the InSb layer. No in-diffusion of Be and S was observed even after 500 °C anneal. The Si implant has an amphoteric doping behavior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348394
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Characteristics of a cylindrical Langmuir probe of finite length (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 6918-6922 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The current collected by a finite-length cylindrical probe is calculated numerically from a self-consistent solution to the Poisson–Vlasov system of equations. A Boltzmann distribution is assumed for the electrons, and results are compared to the standard "orbital-motion-limited'' theory. When the probe is very long compared to the sheath thickness and the ratio of probe radius to electron Debye length, Rp/λDe (approximately-less-than) 1, the collected current agrees with the orbital-motion theory for cylindrical probes; when the probe is very short compared to the sheath thickness and Rp/λDe (approximately-less-than) 1, the collected current agrees with the orbital-motion theory for spherical probes. When the probe length is comparable to the sheath thickness, there is a critical potential above which the probe behaves as a sphere and below which it behaves as a cylinder. Ion charge density, space potential, and ion particle orbits are displayed graphically in the sheath plasma surrounding the probe tip.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347629
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Ferromagnetic resonance and spin anisotropy in iron oxide thin films and iron oxide/nickel oxide superlattices : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6457-6459 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Oriented single-crystalline thin films of Fe3O4 and superlattices of Fe3O4/NiO have been grown using molecular-beam-epitaxy techniques on polished substrates of MgO(001). The 1–2-μm-thick superlattices have their Fe3O4 layer thicknesses held constant at 68 A(ring) and the NiO thickness varied from 8.5 to 102 A(ring). We report the initial ferromagnetic resonance measurements made on these samples to investigate the effects that interfacial lattice distortion and interlayer coupling have on their magnetic ordering and anisotropy. These results are compared with structural and magnetic studies made on the same films using x-ray diffraction and magnetometry techniques. We find clear evidence in the trends of both the ferromagnetic resonance fields and the linewidths as a function of NiO thickness that coupling between the layers can change the in-plane anisotropy and the overall magnetic response. The single-layer Fe3O4-only sample behaves essentially like bulk magnetite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352632
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Chaos in small clusters of inert gas atoms (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 1376-1390 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have calculated the Kolmogorov entropy for three- and seven-particle clusters bound by Lennard-Jones potentials and for three-particle clusters bound by Morse potentials of various ranges. We have used two quite different methods, one of which is new, which give consistent results. We find that all of these systems are classically chaotic over a wide range of energies surrounding the estimated quantum-mechanical zero point energies. Furthermore, for the three-particle clusters, we can rationalize the variation in the degree of chaos with total energy in terms of the local structure of the clusters' potential energy surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.462173
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Radiative transition probabilities for all vibrational levels in the X 1Σ+ state of HF (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 7846-7853 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Recent analyses have led to an experimentally based potential energy curve for the ground state of HF which includes nonadiabatic corrections and which joins smoothly to the long-range potential at an accurately determined dissociation limit (De=49 362±5 cm−1). Using this potential curve and a new ab initio dipole moment function (in excellent agreement with experiment), accurate radiative transition probabilities among all vibrational levels (v=0–19 known, v=20 predicted) of the ground state of HF have been calculated for selected rotational quantum numbers. Comparisons of Einstein A spontaneous emission coefficients, dipole moment absorption matrix elements, and Herman–Wallis factors for absorption bands are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.461313
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Exploring potential energy surfaces with transition state calculations (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 4308-4319 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Means are presented for using stationary points in two ways. One, for well-understood potentials, elucidates relations between the form of the surface and the dynamics that it supports, including the determination of the effective molecular symmetry group. The other, for potentials of uncertain quality, provides a test for unphysical characteristics and suggests how the surface might be improved if it is found to be unsatisfactory in some respect. Our approach involves comparison of transition state calculations using the slowest slide and Cerjan–Miller algorithms for two example systems: the Lennard-Jones Ar7 cluster and the Handy–Carter many-body-expansion potential for the ground state of formaldehyde.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457790
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    van der Waals vibrational dependence in the vibrational predissociation dynamics of OH–Ar (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 6469-6479 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The OH–Ar vibrational predissociation lifetimes and OH product rotational state distributions are shown to change with van der Waals (vdW) state selection within the manifold of OH–Ar vibrational states correlating with OH A2Σ+(v'=1)+Ar(1S0). Excitations to pure vdW stretching levels result in similar product state distributions, but predissociation lifetimes that vary from 30±8 ps at v'vdW=0 to greater than 150 ps at vvdW=6. Excitations to assigned vdW bend-stretch combination bands result in product state distributions which differ from those observed after excitation of the pure vdW stretch and those differences are attributed to the form of the bending wave function. Rotational constants and band positions for OH–Ar features in the OH A2Σ+–X2Π3/2 0–0, 1–0, 1–1, 2–1, 1–2, and 2–2 regions are also presented. The spectroscopic analysis reveals details about the radial portion of the intermolecular potential between Ar (1S0) and hydroxyl radicals in the ground X2Π3/2 and excited A2Σ+ states. Vibrational excitation of the OH moiety induces measurable perturbations in the interaction potentials along the OH–Ar vdW stretching coordinate for both electronic states. These changes are reflected in the vibrational predissociation rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458327
    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...