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  • 1
    Electronic Resource
    Electronic Resource
    Molecular Characterization of HPH-1: A Mouse Mutant Deficient in GTP Cyclohydrolase I Activity
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 203 (1994), S. 1675-1681 
    Details
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1006/bbrc.1994.2379
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  • 2
    Electronic Resource
    Electronic Resource
    MOPS, a magneto-optic photoconductor sandwich
    Amsterdam : Elsevier
    Physica B+C 89 (1977), S. 273 
    Details
    ISSN: 0378-4363
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0378-4363(77)90095-X
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  • 3
    Electronic Resource
    Electronic Resource
    Magnetic and magneto-optical properties of rare-earth transition-metal alloys containing Gd, Tb, Fe, Co (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 756-767 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Binary and ternary amorphous rare-earth transition-metal alloys of general composition RE1−x(Fe1−yCoy)x with RE=Gd, Tb and 0〈x〈1, 0≤y≤1 were prepared by evaporation. The saturation magnetization, uniaxial anisotropy, and Faraday rotation were investigated as a function of composition and temperature. Also, from the temperature-dependent measurements the compositional variation of the Curie temperature and the compensation temperature were determined. The experimental data have been analyzed in terms of the mean-field theory yielding spin values and effective exchange interaction energies. The compositional variation of the spin value was described by the environment model. The anisotropy data were fitted with a dipolar equation using the sublattice magnetizations inferred from the mean-field analysis. The magneto-optical effects are primarily caused by the transition metals. For the binaries GdFe and GdCo the compositional variation of the Kerr rotation typically peaks between 1000 and 1500 nm. The lowest magneto-optical effects for binary RE-Th alloys with respect to composition are reached at about x≈0.5 for T=4.2 K. The temperature dependence of the Faraday rotation can be well described in terms of the sublattice magnetizations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.343551
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  • 4
    Electronic Resource
    Electronic Resource
    Magnetic and magneto-optical properties of rare-earth transition-metal alloys containing Dy, Ho, Fe, Co (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 3194-3207 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Amorphous rare-earth transition-metal alloys of composition REl−xTMx with RE=Dy, Ho; TM=Fe,Co and 0〈x〈1 and Dyl−x(Fe,Co)x were prepared by evaporation. The saturation magnetization, uniaxial anisotropy, coercivity, and Faraday rotation were investigated as a function of composition and temperature. Also, the spectral variation of the Kerr rotation was measured. The magnetization data indicate a strong dispersion of the RE moments due to randomly oriented local crystal field axes. The strong turndown of the Curie temperature for the Fe-rich alloys suggests that an additional dispersion is present in the Fe subnetwork. The mean field theory was used to analyze the temperature variation of the magnetization yielding smaller TM spin values and exchange coupling constants as compared with those of the Gd and Tb analogs. The uniaxial anisotropy constant Ku for Dy-Co based alloys was found to vary with the square of the Dy subnetwork magnetization as predicted by the random single-ion theory. The anisotropy of Dy-Fe and Ho based alloys require additionally dipolar terms to account for the measured temperature dependence of Ku. The coercive field Hc follows a relation Hc ∼ K1.5u/Ms. The magneto-optical effects are primarily caused by the transition metals and therefore their compositional, temperature, and spectral dependence correspond to that of their Gd and Tb analogs. Optical recording experiments on Dy-FeCo disks yield good write and erase sensitivities and carrier-to-noise ratios up to 60 dB which are comparable to those of GdTb-Fe and Tb-FeCo disks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348561
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  • 5
    Electronic Resource
    Electronic Resource
    Magnetoelastic and optoelastic coupling in (111)- and (110)-oriented bismuth-iron garnet films prepared by sputter epitaxy (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 62 (1987), S. 3879-3888 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: High-quality iron-garnet films of composition Gd3−vBivFe5−w−x−yGdw GaxAlyO12−zArz with 1.02≤v≤1.45, 0.01≤w≤0.36, 0.22≤x≤0.24, 0.26≤y≤0.38, and 0.002≤z≤0.014 have been grown epitaxially on (111)- and (110)-oriented gallium garnet substrates with the lattice constant in the range 1.2475≤a0(nm)≤1.2553 by rf magnetron sputtering in argon plasma. For the study of the optoelastic and magnetoelastic properties of these sputter-epitaxial films the lattice mismatch Δa⊥=as−a⊥f has been varied in the range −1.7〈Δa⊥(10−2 nm)〈0.5 by using substrates with various lattice constants. The near-infrared optical anisotropy normal to (Δnxy) and in the plane (Δnyz) of (110)-oriented films turn out to depend linearly on Δa⊥ over this large range of lattice misfits. No growth-induced contribution has been observed. The same behavior is found for the induced uniaxial (K⊥) and in-plane (K(parallel)) magnetic anisotropy constants at room temperature. The optoelastic coefficients P44 and ΔP, as well as the magnetostriction constants λ111 and λ100 inferred from the measured optical and magnetic anisotropies, respectively, compare well with literature values for the considered film compositions if excess gadolinum is taken as diamagnetic substitution on octahedral lattice sites. The epitaxial structure of the films has been confirmed by the narrow x-ray diffraction linewidth from x-ray double-crystal rocking curves and is supported by the extremely low waveguide losses at 1.33-μm wavelength and the low magnetic wall coercivity, i.e., α=0.15 cm−1 and 60 A m−1, respectively. The structural quality of (110)-oriented films is the same as that of (111)-oriented films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.339233
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  • 6
    Electronic Resource
    Electronic Resource
    Magnetic and magneto-optic properties of praseodymium- and bismuth-substituted yttrium iron garnet films (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 721-727 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Garnet films of composition R3−x−yPrxBiyFe5O12 with R=Lu, Y, and 0≤x≤1.8, 0≤y≤1.7 have been grown from different melt compositions and under various growth conditions onto substituted gadolinium gallium garnet substrates with (100), (110), (111), and (211) orientation. The dependence on composition and temperature of the saturation magnetization Ms, the uniaxial anisotropy constant Ku, the Faraday rotation θF, and the Faraday ellipticity ψF, have been investigated. The change of Ms as compared to that of Y3Fe5O12 is essentially associated with the alignment of the Pr moment parallel to the net iron moment and the increase of the Curie temperature originating mainly from the bismuth. However, both contributions are negligible in the room-temperature range. The uniaxial anisotropy is strongly affected by both Pr and Bi. The anisotropy contributions ΔKu /x〈0 and ΔKu/y〉0 turn out to be approximately additive. Both Pr and Bi give rise to a pronounced enhancement of the magneto-optical effects. At λ=633 nm θF increases linearly with x and y yielding at T=295 K the contributions ΔθF/x =−3.8×105 deg m−1 and ΔθF/y=−20.6×105 deg m−1, respectively. The bismuth contribution compares well with that observed for various other Bi-substituted rare earth iron garnets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337420
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  • 7
    Electronic Resource
    Electronic Resource
    Growth-induced anisotropy and Faraday rotation of bismuth-substituted europium-iron-garnet films (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 2058-2064 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The saturation magnetization Ms, the growth-induced uniaxial anisotropy constant Kgu, and the Faraday rotation θF, of [111]-oriented epitaxial iron-garnet films of composition Eu3−xBixFe5O12 with x≤1.3, have been investigated as a function of composition and temperature, and, have been compared with bismuth-free films of composition Eu3−xLuxFe5O12 and Eu3−uPbuFe5O12 with u≤0.124. The results indicate a strong dependence of Kgu on growth direction, lead and bismuth content, and growth parameters, which are associated with the noncubic occupancy of the Bi3+, Pb2+, and Eu3+ ions. A maximum Kgu value of 8×104 J m−3 occurs for x=1.3 and T=4.2 K. The temperature dependence of Kgu for bismuth-substituted films is interpreted in terms of the calculated Eu3+ and the Bi3+-Fe3+ contributions. At λ=633 nm and T=295 K, the lead- and bismuth-induced Faraday rotations ΔθF/u and ΔθF/x are −1.1×106 and −2.06×106 deg m−1, respectively, in good agreement with results reported for other rare-earth garnets. These data confirm the result that ΔθF/x is independent of the rare-earth ion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341108
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  • 8
    Electronic Resource
    Electronic Resource
    Thermomagnetic switching on rare-earth transition-metal alloy magneto-optic disks (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 1273-1278 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The thermomagnetic switching behavior of magneto-optic disks with amorphous TbFeCo and GdTbFe films was investigated on a test recorder. Domain length, write and erase fields, and erase laser power required for total domain erasure was studied for various film compositions, which differ in compensation temperature Tcomp and Curie temperature TC. With increasing TC the domain length at fixed writing laser pulse energy is reduced and the power required to erase domains with a certain size is increased. The optimum external field, for minimal write noise, decreases with increasing TC−Tcomp. The experimental dependencies agree with calculated results obtained from the force balance controlling the domain formation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344425
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  • 9
    Electronic Resource
    Electronic Resource
    Growth-induced uniaxial anisotropy of bismuth-substituted iron-garnet films (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 454-459 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The temperature dependence of the growth-induced uniaxial anisotropy constant Kgu of epitaxially grown bismuth-substituted garnet films of composition R3−xBixFe5O12 with R=Y, Lu has been measured in the temperature range 4.2 K≤T≤TC. Films with (100), (110), (112), and (111) orientation have ben investigated and exhibit a very different temperature variation of Kgu. The experimental data are compared with theoretical results based on a recently reported single-ion theory applying to bismuth-induced uniaxial anisotropies. Kgu is calculated in terms of the actual sublattice magnetizations inferred from the fit of the molecular field theory to the measured saturation magnetization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335645
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  • 10
    Electronic Resource
    Electronic Resource
    The Effects of Two Different Decalcification Procedures on Size and Structure of Embryonic Epithelial Tissue in Objects Prepared for Light Microscopy (2000)
    Oxford, UK : Blackwell Science, Ltd
    Anatomia, histologia, embryologia 29 (2000), S. 0 
    Details
    ISSN: 1439-0264
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Electrolytic decalcification is a very fast and effective method for removing calcium compounds from bones with minimum damage to tissues. Changes of dimension of tissues in histological sections prepared from specimens decalcified by immersion in a formic acid solution and sections prepared from specimens treated in an electrolytic decalcifier were studied. Heads of mouse foetuses were cut in half, decalcified by one of the above-mentioned methods and embedded in histowax. Dimensional changes of skin, tongue and nasal epithelia in histological sections were evaluated by t-test. Significant shrinking and other unwanted effects of decalcification, such as acidophilia of nuclei, were found in objects decalcified by both methods. No significant differences in the effects of the two methods on tissue dimensions were demonstrated. It is concluded that both decalcification methods are equivalent from the qualitative point of view.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0264.2000.00288.x
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