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  • 1
    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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  • 2
    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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  • 3
    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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  • 4
    Electronic Resource
    Electronic Resource
    Use of complexing agents for determining the absolute configurations of .alpha.-glycols and .alpha.-amino alcohols. Applications to complex natural products (1974)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 96 (1974), S. 4059-4061 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00819a078
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  • 5
    Electronic Resource
    Electronic Resource
    Broadband magneto-optic waveguide isolator (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 57 (1990), S. 960-962 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Isolation ratios between −32 and −37 dB have been measured on a magneto-optic waveguide isolator over a wavelength range from 1.43 to 1.58 μm. This tunable broadband operation was achieved by rotating the input polarization angle by 22.5° from the waveguide surface of a 45° Faraday rotator to overcome the harmful effects of moderate linear birefringence. The output polarizer was then rotated to maximize the isolation ratio at each wavelength. The excess forward loss introduced by this procedure was 10% or less over this wavelength range. It is shown that excellent isolation and moderate excess forward loss (1 dB or less) can be achieved with triple garnet film, single-mode ridge waveguides over a wavelength range of ±0.2 μm around the etch-tuned wavelength, and over a temperature range of ±30 °C, which greatly enhances the usefulness of these waveguide isolators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.103525
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  • 6
    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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  • 7
    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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  • 8
    Electronic Resource
    Electronic Resource
    Reproductive failure in women living in iodine deficient areas of West Africa (2000)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 107 (2000), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objectives To investigate the association between iodine status and reproductive failure in a population of West African women.Design Epidemiological survey on iodine deficiency disorders carried out in 1996–1997.Setting The iodine deficient areas of Senegal (Casamance and Senegal Oriental).Population Four thousand nine hundred and eighty women, aged 10 to 50, of whom 1544 adolescent and 462 pregnant women were examined for thyroid size and urinary iodine excretion. Their iodine status was associated with their fertility rate and reproductive failures.Results Reproductive failure (defined as repeated miscarriages and stillbirth) was associated with low iodine status, with severe iodine deficiency increasing the risk. Poor nutritional status and illiteracy had a significant effect on the outcome of pregnancy: underweight women had a fourfold higher risk, and those who were illiterate an eightfold higher risk, of failed pregnancy, compared with nutritionally healthy, literature women.Conclusions These findings emphasise the need to implement an effective iodine supplementation programme targeted at young and pregnant women in this area of western Africa. They also emphasise the importance of improving the nutritional status of young girls and the crucial role played by education in the prevention of reproductive failure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.2000.tb13305.x
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  • 9
    Electronic Resource
    Electronic Resource
    Use of complexing agents for determining the absolute configurations of .alpha.-glycols and .alpha.-amino alcohols. Basic systems (1974)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 96 (1974), S. 4057-4059 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00819a077
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    An impact cutting test for tire tread stocks (1936)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 8 (1936), S. 68-71 
    Details
    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/ac50099a031
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