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  • 1
    Electronic Resource
    Electronic Resource
    Influence of the phase transition of Tb on the magnetic properties of Fe/Tb multilayers (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 5756-5758 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The impact of the phase transition between para- and ferromagnetic states of Tb on the magnetic properties of Fe/Tb multilayers has been studied by taking low temperature Mössbauer measurements. 26 Fe/Tb multilayer samples with a wide range of thickness were fabricated by planar magnetron sputtering on polyester and glass substrates. The magnetic and structural properties of these samples were examined using x-ray diffraction, Mössbauer spectroscopy, and torque magnetometry. At room temperature, Mössbauer spectra show perpendicular magnetic anisotropy (PMA) of the Fe magnetic moments for samples that consist of Fe layers and mixed interfaces only. The formation of an unmixed Tb layer starting at about 12 Å Tb layer thickness leads to parallel alignment of the Fe magnetic moments. For samples for which discrete Tb layers are formed, these Tb layers are probably paramagnetic at room temperature as can be deduced from low temperature Mössbauer measurements and room temperature torque measurement. The hyperfine field of Fe in these multilayers as determined from Mössbauer spectroscopy shows a relative minimum around the Curie temperature of Tb of 220 K indicating reorientation of the Fe moments due to spin polarization of Tb. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370116
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  • 2
    Electronic Resource
    Electronic Resource
    Magnetic properties of Fe/Tb multilayers with large Fe layer thickness (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 4696-4698 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Fe/Tb multilayers that display significant perpendicular magnetic anisotropy (PMA) up to an Fe layer thickness of 55 Å have been fabricated and examined for the first time (to the best knowledge of the authors). Two series of Fe/Tb multilayer samples with a wide range of Fe layer thickness ranging between 8 and 55 Å and with constant Tb layer thickness of 6.5 and 11.5 Å were fabricated by planar magnetron sputtering. The magnetic and structural properties of these samples were examined using x-ray diffraction, Mössbauer spectroscopy, and torque magnetometry. Mössbauer spectra show PMA of the Fe magnetic moments for samples that consist of Fe layers and mixed interfaces only. The formation of an unmixed Tb layer starting at about 12 Å Tb layer thickness leads to parallel alignment of the Fe magnetic moments. PMA in such multilayers is induced by a mixed interface and maintained by the exchange interaction between adjacent Fe layers. The interfaces that induce PMA in Fe/Tb multilayers are very close in composition to that of TbFe2 for which maximum PMA was found in thin amorphous Fe–Tb films. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370451
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  • 3
    Electronic Resource
    Electronic Resource
    Histological changes in thyroid of rat under the acute exposure of O-chloro-benzylidine malononitrile (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 1327-1327 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary This communication describes histological changes in the thyroid gland of rats under the acute stress of O-chlorobenzylidene malononitrile (CS) (10 mg/kg and 20 mg/kg). It has been observed that CS, when injected, causes histological changes in the thyroid of varying degrees, depending on the dose used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01981449
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  • 4
    Electronic Resource
    Electronic Resource
    Cellular changes of adrenal under the acute stress of O-chlorobenzylidene malononitrile (CS) (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 494-495 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary This investigation describes histological and cytometrical changes of cortical and medullary tissue of adrenal in rats under the acute stress of O-chlorobenzylidene malononitrile (10 mg/kg and 20 mg/kg). It has been observed that after injection of CS, the adrenal gland showed histological changes both in the cortical and medullary region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01935948
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  • 5
    Electronic Resource
    Electronic Resource
    Role of ACTH on the cytomorphology of testes of the immature rat (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 1606-1607 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The male gametogenic development of the immature rat shows inhibitory effect by the exogenous infusion of ACTH (0.25 IU and 0.50 IU; i.p.). Seminiferous tubular degeneration, Leydig cell atrophy and Sertoli cell regression are very conspicuous in the dosage of 0.50 IU ACTH (i.p.). Cytometrical and histological evidence confirms that ACTH could be inhibited by FSH during male gametogenic development which leads to cellular degeneration of testes in the immature rat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01953219
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  • 6
    Electronic Resource
    Electronic Resource
    Critical behavior of quenched randomly disordered Ni and Fe alloys (1981)
    Springer
    Hyperfine interactions 10 (1981), S. 893-899 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01022028
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of ploidy variation on amino acid composition ofDatura innoxia (Solanaceae) (1984)
    Springer
    Plant systematics and evolution 145 (1984), S. 165-168 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Solanaceae ; Datura innoxia ; Haploidy ; diploidy ; triploidy ; tetraploidy ; hexaploidy ; amino acid composition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In haploid, diploid, triploid, tetraploid and hexaploid cytotypes of the scopalamine-yieldingDatura innoxia, the amino acid profiles were studied. The results suggest that the amino acid composition is influenced quantitatively by increasing ploidy levels, but in an irregular way.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983945
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