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  • 1995-1999  (6)
  • 1990-1994  (13)
  • 1955-1959  (2)
  • 1940-1944  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Increased exchange anisotropy due to disorder at permalloy/CoO interfaces (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 1887-1891 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The exchange anisotropy of Ni80Fe20 (permalloy) films deposited onto bulk single crystal CoO substrates using molecular-beam epitaxy is strongly affected by the interface structure. Contrary to expectations for uncompensated interfaces, the loop shift increases for samples with greater interface disorder. The results are discussed in the light of proposed exchange anisotropy models. The results suggest that antiferromagnet domain dynamics are an important part of the exchange anisotropy mechanism. © 1995 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.360225
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  • 2
    Digitale Medien
    Digitale Medien
    A simple electron cyclotron resonance ion source (abstract)a) : Proceedings of the 6th international conference on ion sources (1996)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 1216-1216 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A simple, all permanent magnet, 2.45 GHz electron cyclotron resonance ion source has been developed for the production of stable beams of low charge state ions from gaseous feed materials. The source can produce ∼1 mA of low energy (3 kV) singly charged ion current in the 10−4 Torr pressure range. The source can also be operated in a more efficient low-pressure mode at an order of magnitude lower pressure. In this latter range, for example, the ionization efficiency of Ar is estimated to be 1% with charge states up to Ar8+ present. Operation in the low-pressure mode requires low power input (∼20 W). These features make the source especially suited for use with small accelerator systems for a number of applications including ion implantation, mass spectrometry, and atomic collision experiments where multiply charged ions are desirable. Design details and performance characteristics of the source are presented. © 1996 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1147237
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  • 3
    Digitale Medien
    Digitale Medien
    A simple electron cyclotron resonance ion sourcea) (1996)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 1634-1637 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A simple, all permanent magnet, 2.45 GHz electron cyclotron resonance ion source has been developed for the production of stable beams of low charge state ions from gaseous feed materials. The source can produce ∼1 mA of low energy (3 kV) singly charged ion current in the 10−4 Torr pressure range. The source can also be operated in a more efficient low-pressure mode at an order of magnitude lower pressure. In this latter range, for example, the ionization efficiency of Ar is estimated to be 1% with charge states up to Ar8+ present. Operation in the low-pressure mode requires low power input (∼20 W). These features make the source especially suited for use with small accelerator systems for a number of applications including ion implantation, mass spectrometry, and atomic collision experiments where multiply charged ions are desirable. Design details and performance characteristics of the source are presented. © 1996 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1146906
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  • 4
    Digitale Medien
    Digitale Medien
    Perpendicular coupling at Fe–FeF2 interfaces (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 72 (1998), S. 617-619 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We have studied the exchange anisotropy of ferromagnetic Fe films grown on antiferromagnetic FeF2 single crystals. The behavior of the hysteresis loops of the Fe above and below the Néel temperature TN of FeF2 indicates a 90° rotation of the ferromagnetic easy axis due to the antiferromagnetic ordering. By examining the Fe hysteresis loops together with the FeF2 susceptibility behavior we infer that below TN the ferromagnetic and antiferromagnetic spins are coupled perpendicular to each other. This behavior can be explained by recent micromagnetic calculations on exchange bias systems, or by magnetoelastic effects. © 1998 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.120823
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  • 5
    Digitale Medien
    Digitale Medien
    Large exchange bias and its connection to interface structure in FeF2–Fe bilayers (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 3186-3188 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Large exchange bias effects (ΔE∼1.1 erg/cm2) were observed in antiferromagnetic (FeF2)–ferromagnetic (Fe) bilayers grown on MgO. The FeF2 grows along the spin-compensated (110) direction. The FeF2–Fe interface roughness was characterized using specular and diffuse x-ray diffraction and atomic force microscopy. The magnitude of the exchange bias field HE increases as the interface roughness decreases. These results imply that magnetic domain creation in the antiferromagnet plays an important role. © 1996 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.115819
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  • 6
    Digitale Medien
    Digitale Medien
    Large magnetoresistance with low saturation fields in magnetic/magnetic superlattices (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 2590-2592 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Ni/Co multilayers grown by molecular beam epitaxy are found to exhibit a magnetoresistance ΔR/R at liquid helium temperature as large as 8.2%, with saturation fields ΔH≈22 Oe and a sensitivity (ΔR/R)/(2ΔH)≈0.19% Oe−1. The highest room temperature sensitivity obtained to date in this system is 0.18% Oe−1 and at 4.2 K is 0.29% Oe−1. This demonstrates that high values of the sensitivity can be achieved in multilayers in which both components are ferromagnetic. The magnetoresistance and saturation field can be tuned by the superlattice and growth parameters.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.111535
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  • 7
    Digitale Medien
    Digitale Medien
    New high-temperature superconducting phase spread alloy thin films (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 1276-1278 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We have prepared Gd1−xPrxBa2Cu3O7−δ phase spread alloy thin films with well-defined variations in the concentration of Pr across a single substrate. Their Pr concentrations were independently determined from electrical resistivity and Auger electron spectroscopy measurements. The results from both methods are in good agreement with each other. Using this technique several high-temperature superconducting thin-film alloys may be grown under virtually identical conditions. As an example of an important application of this technique, we measured the changes in the films' resistivities and critical temperatures (Tc) induced by decreasing their oxygen concentration. The observed shifts in Tc of the oxygen-deficient samples appear to be slightly dependent on their Pr concentrations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.109756
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  • 8
    Digitale Medien
    Digitale Medien
    Structures and Energies of Sodium Halide Ions and Neutral Clusters Computed with ab Initio Effective Core Potentials (1994)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 10042-10047 
    Details
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/j100091a017
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  • 9
    Digitale Medien
    Digitale Medien
    Riboflavin and Vitamin B 1 in Nineteenth Century Buns and Ale (1943)
    [s.l.] : Nature Publishing Group
    Nature 152 (1943), S. 273-273 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] RECENTLY, one of us (H.S.S.) was presented by Mr. H. W. Hedges, of Fairford, Gloucester, with two currant buns; one was baked in 1863 to celebrate the wedding of the Prince of Wales and the other in 1887 for Queen Victoria's jubilee. Both had been kept as souvenirs of the “Cakes and Ales” ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/152273a0
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  • 10
    Digitale Medien
    Digitale Medien
    Effect on the Growth-rate of Weanling Rats of supplementing the Protein of White Bread with l -Lysine (1956)
    [s.l.] : Nature Publishing Group
    Nature 178 (1956), S. 46-47 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] This type of experiment was of additional interest since it is known that, with certain diets, an increase in the content of a single amino-acid may lead to a reduced rate of growth through inducing an amino-acid imbalance. This effect, and the related problem of antagonism between certain ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/178046a0
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