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  • 1
    Electronic Resource
    Electronic Resource
    Tensile Properties of Newer Fibers (1952)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 44 (1952), S. 2115-2122 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50513a037
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  • 2
    Electronic Resource
    Electronic Resource
    Magneto-optical study of uranium additions to amorphous TbxFe1−x (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 1103-1107 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Recent reports of huge magneto-optical Kerr rotations in certain crystalline metallic uranium compounds prompted a study of the magnetic and magneto-optical effects of uranium additions to a rare-earth transition metal amorphous alloy. Using variable composition samples, the polar Kerr effect at a small spot (e.g., 0.5 mm diam) was measured as field, temperature, and composition were varied. Points on the Curie line and the edges of the compensation region were determined from these observations. The compositions studied included (TbxFe1−x)1−yUy with 0.125≤x≤0.550 and y=0.0, 0.04, 0.07, 0.16. The addition of uranium to TbxFe1−x depresses the TC of Tb-rich material much more strongly than that of Tb-poor material. The compensation region does not shift at all with increasing y. It appears that uranium does not contribute to the magnetization of these amorphous alloys, nor does it significantly affect the magneto-optical effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338206
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  • 3
    Electronic Resource
    Electronic Resource
    Use of the longitudinal magneto-optical Kerr effect to study nonmagnetic/magnetic bilayers (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 6098-6100 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the results of longitudinal magneto-optical Kerr effect (LMKE) measurements on bilayers consisting of a thick permalloy film covered by varying thicknesses of Nb. The LMKE pertains to situations in which light with a finite angle of incidence is reflected from a plane surface, and M in the sample is parallel both to the plane of incidence and the surface. Either s- or p-linearly polarized 6328-A(ring) light is incident on the sample at 60° to the normal. The two components of the complex Kerr rotation are measured with a modulation technique utilizing a λ/4 plate and a Faraday rotator driven by dc and 2000-Hz signals. With cycling of an in-plane magnetic field, square magneto-optical hysteresis loops are observed in both rotation and ellipticity. There is a change in sign, as well as a decrease in the magnitude of the switching discontinuity in these quantities with increasing overlayer thickness. These results are very similar to those of the corresponding idealized boundary value problem. The technique gives experimental information on the magnetic properties of films buried below a nonmagnetic material or of thin films bounded on both sides by a nonmagnetic material. Further, it gives a probe of the phase and intensity of optical frequency electric fields below a reflecting surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342105
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  • 4
    Electronic Resource
    Electronic Resource
    Magneto-optic waveguide hysteresis loops of "planar'' magnetic garnet films (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 3342-3347 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Epitaxial films of modified yttrium iron garnet which are used as optical waveguides for magneto-optic devices have nominally planar anisotropy so that their magnetization can be aligned by small in-plane fields. Films grown on (111) substrates usually have some residual cubic anisotropy that is difficult to measure in the active layer of the double- or triple-layer films used in single-mode waveguides. A new method to determine the magnetic properties of the optically active layer itself has been developed. It is based on magneto-optical hysteresis loops in which the Faraday rotation of the waveguided light is plotted against one component of a rotating in-plane magnetic field. Steps in these hysteresis loops are directly related to the sixfold symmetry of the magnetocrystalline anisotropy of these films. The influence of linear birefringence on the measured Faraday rotation, the magnetostrictive effects associated with the pressure of the prism used for optical coupling into the waveguide, and the advantages of end-fire coupling are discussed. These hysteresis loops are being used in the design of materials for magneto-optic isolators and other waveguide devices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344131
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  • 5
    Electronic Resource
    Electronic Resource
    Polar Kerr effect in high-Tc superconductors: The rotating-plate technique (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 1060-1062 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A technique recently used for measurement of the complex polar Kerr rotation in high-Tc superconductors is discussed in a tutorial manner, making use of a Jones matrix approach. The primary concern addressed is the rejection of effects caused by linear birefringence and dichroism effects in the sample and associated optical components. This rejection is accomplished by the use of a rotating half-wave retardation plate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349696
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Faraday rotation in Hg1−xMnxTe at 1.3 and 1.55 μm (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 4917-4919 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The large Faraday rotations of Mn-containing diluted magnetic semiconductors have led to their consideration for use in magneto-optical isolators. With such applications in mind, we have examined the magneto-optical properties of Hg1−xMnxTe (x=0.26, 0.31, and 0.36). The samples are polished plates cut from single-crystal boules. The compositions were chosen to have their band edges in the vicinity of wavelengths of interest for fiber optical communications, 1.3 and 1.55 μm. Faraday rotation at 295, 77, and 1.7 K, as well as the absorption coefficient at 295 K, have been measured for these alloys and the data compared with the theoretical predictions. The measured rotations at the wavelengths of interest here are about 100-fold larger than those of other high-rotation paramagnetic materials, such as Tb3Al5O10 and various rare-earth glasses. However, the specific rotations available in reasonable fields (say, 3000 Oe) are about tenfold lower than those reported for Bi-doped ferrimagnetic garnets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344732
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  • 7
    Electronic Resource
    Electronic Resource
    The search for circular dichroism in high-Tc superconductors (abstract) : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5205-5205 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Stimulated by recent predictions of broken time reversal symmetry in cuprate superconductors, we have carried out a study of the polar Kerr ellipticity (the ellipticity of normally reflected light with the incident beam linearly polarized) for various cuprate materials, both superconducting and nonsuperconducting. The technique used employs a rotating half-wave retardation plate in order to discriminate against linear polarization effects. The results reveal a signature of a nonzero polar Kerr ellipticity which appears on cooling near 200 K in a variety of superconducting materials, and which is not observed in the corresponding insulating compounds. In this talk, in addition to summarizing these results, we plan to discuss the measurement technique itself in some detail. Measurements on both thin films and bulk samples will be discussed, together with a variety of tests on unrelated materials, which serve to eliminate various possible experimental artifacts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348075
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  • 8
    Electronic Resource
    Electronic Resource
    Intrinsic anisotropy of Tb-Fe films prepared by magnetron Co sputtering (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 3897-3899 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Amorphous Tb-Fe thin films have been produced by dual-gun dc magnetron cosputtering, which allows a moderate range of compositions (spanning about 20 at. %) to be deposited in a single run under identical conditions. The films exhibit clean M-H loops and torque curves which are somewhat anomalous but show consistent trends. Films deposited at room temperature with a composition in the range 17–30 at. % Tb showed a positive intrinsic anisotropy of roughly 3×106 erg/cm3, resulting in an easy axis of magnetization that is perpendicular to the plane of the film, while films with 〉37 at. % Tb had a small negative intrinsic anisotropy (ca. −2×105 erg/cm3). The temperature dependence of the anisotropy indicates that neither uniaxial stress nor shape anisotropy can account for most of the intrinsic uniaxial anisotropy observed, so we hypothesize that the large anisotropy must be due to pair ordering or a local anisotropy field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.334908
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  • 9
    Electronic Resource
    Electronic Resource
    Aging effects on amorphous Tb–transition-metal films prepared by diode and magnetron sputtering (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 3900-3902 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have studied and compared the aging characteristics of the amorphous Tb(FeCo) films from both dc getter diode and magnetron sputtering. No protecting layer such as SiO2 or Al2O3 was put on the films. Fresh films of 1.0-μm thickness from diode sputtering showed a perpendicular anisotropy and well-behaved magnetic properties using a vibrating sample magnetometer and an automatic torque magnetometer. We noticed a decrease in perpendicular anisotropy when the films were exposed to the air. However, this aging phenomenon was not observed in films of the same thickness prepared by magnetron sputtering even after seven months' exposure to the air. The reasons for the difference are due to two distinct reaction mechanisms: bulk reaction in diode-sputtered films and surface reaction in magnetron-sputtered films. A variation of the microstructure is believed to attribute to this. The surface reaction was studied in thinner magnetron-sputtered films of 10 and 25 nm, where the surface-to-bulk ratio is larger. A decrease in perpendicular anisotropy with aging was observed in these thinner films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.334909
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  • 10
    Electronic Resource
    Electronic Resource
    Spin resonance in EuxSr1−xS with x=0.4, 0.5, and 0.54 (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 3488-3490 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electron spin resonance has been studied in single crystal spheres of EuxSr1−xS with samples of nominal composition x=0.4, 0.5, and 0.54. The emphasis has been on the field for resonance of x=0.4 material at 11.65 GHz at temperatures between 4.2 and 1.65 K. Even at the lowest temperatures the lines do not vary with crystal orientation. In all samples there is a depression of the field for resonance beginning at about 10 K, and increasing to the lowest temperatures. This is interpeted as an "internal'' field Hi. Measurements at 17 GHz reveal that Hi for all three compositions decreases with increasing frequency. Surprisingly, at 1.65 K, this seems to vary with sphere size for the x=0.4 composition. In addition to the experiments on spheres, a small plate-shaped specimen of x=0.4 was studied. It too showed a large depression of the field for resonance at 1.75 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335035
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