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  • 1
    Electronic Resource
    Electronic Resource
    Distorted hydrogen bonds formed by carbonyl compounds (1971)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 75 (1971), S. 1744-1748 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100906a018
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  • 2
    Electronic Resource
    Electronic Resource
    Spectroscopic and kinetic investigations on the interaction of tertiary amines with chloranil (1975)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 79 (1975), S. 322-326 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100571a007
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  • 3
    Electronic Resource
    Electronic Resource
    A NOTE ON MAGNETIZED SPHERES (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 25 (1977), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The interpretation of total field anomalies becomes somewhat complicated, especially when an arbitrarily magnetized spherical ore mass happens to be the causative body. Even though some attempts have been made to analyze total field anomaly maps, they are often too complicated and their underlying assumptions in respect of permanent and induced components of magnetism are far from realistic. In this note, an attempt has been made to show that vertical magnetic anomalies are capable of yielding interpretation with ease and precision as far as magnetized spheres are concerned. An empirical method has been outlined for computing the magnetization inclination in the plane of the profile using the measured distances between principal maximum, principal minimum, and zero anomaly positions on a magnetic anomaly profile.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1977.tb01201.x
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  • 4
    Electronic Resource
    Electronic Resource
    Magnetic and phase transformation studies in Nd15DyFe75(C,B)9 cast alloys : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 4616-4618 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Previous studies have shown that high coercivities can be achieved in cast Nd–Fe–C alloys through an annealing heat treatment at 900 °C, which causes a peritectoidal transformation from Nd2Fe17Cx to Nd2Fe14Cx. We have studied the characteristics of this transformation in cast Nd15DyFe75(C,B)9 alloys. Optimum coercivities were obtained by annealing for 6 h at 900 °C. A highly faulted carbide phase was identified in samples annealed for 5 min at 900 °C. From electron diffraction investigations, this phase was identified to be hexagonal with lattice parameters, a=0.48 nm and c=0.81 nm. The development of coercivity in the various stages of transformation is related to the crystal structure and microstructure developed in the transformation. The presence of α-Fe in samples with increased Fe content leads to reduced coercivities. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361681
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  • 5
    Electronic Resource
    Electronic Resource
    Magnetic hardening of melt-spun nanocomposite Nd2Fe14B/Fe magnets : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 4827-4829 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Coercivity optimization studies were done on melt-spun nanocomposite Nd4R2Fe87−xNbTxB6 (R=Nd,Y,Dy; T=Ag,Cu) isotropic ribbon samples. The maximum attainable coercivities, after adjusting the annealing time, were found to be very sensitive to the annealing temperatures. The optimum magnetic properties [HC=3.9 kOe, (BH)max=10 MGOe] were obtained by annealing at 750–775 °C for a few minutes. Optimization by flash annealing gave similar results. Microstructural studies show that the grain size is greater than the theoretically predicted grain size for optimum coupling between the hard and the soft phase. With the annealing conditions used, Nd4Dy2Fe87NbB6 samples gave moderate coercivities and in Nd4Y2Fe87NbB6 samples the coercivity was reduced more than the expected reduction in the anisotropy field due to the presence of Y. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361621
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  • 6
    Electronic Resource
    Electronic Resource
    Magnetic properties of exchange-coupled Fe/FeO bilayers : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5106-5108 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic, structural and microstructural properties of sputtered Fe thin films and Fe(backward-slash)Fe–O bilayers were studied as a function of the Fe layer thickness, the type of the Fe oxide and the substrate used. Two different ways to prepare the oxide layers were used; postdeposition oxidation and reactive sputtering. Postdeposition oxidation produced films with mixed Fe–oxides (FeO, Fe3O4, Fe2O3); however reactive sputtering led to bilayers with controlled stoichiometry, Fe(backward-slash)FeO, Fe(backward-slash)Fe3O4, and Fe(backward-slash)FE2O3, respectively. The coercivity of both the Fe films and fE(backward-slash)Fe–O bilayers, deposited on substrates with or without Cr buffer layer, was found to increase with decreasing Fe film thickness. The coercivity of the samples deposited on a Ag buffer layer was much lower and did not change substantially with the Fe film thickness. The presence of the Fe–oxide layer led to a large increase of coercivity. This is attributed to the higher anisotropy of the oxide and to exchange coupling of Fe–oxide with the softer Fe layer. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361316
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  • 7
    Electronic Resource
    Electronic Resource
    Magnetic and structural properties of Fe-FeO bilayers : The 6th joint magnetism and magnetic materials (MMM)-intermag conference (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 6543-6545 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The structural and magnetic properties of sputtered Fe/Fe-O films were studied by x-ray photoelectron spectroscopy (XPS), Rutherford backscattering spectroscopy, transmission electron microscopy, and superconducting quantum interference device. XPS studies showed the presence of FeO and Fe2O3 on the surface of as-made samples. Microstructure studies showed a uniform nanostructure with the grain size in the range of 50–150 A(ring) with smaller grains corresponding to thinner films. The coercivity at 10 K was found to increase substantially with decreasing film thickness below 60 A(ring). A high Hc (2.7 kOe) was observed in samples with a thickness about 20 A(ring). Magnetization curves showed a planar anisotropy with a shifted hysteresis loop characteristic of an exchange anisotropy between the Fe and Fe-O coating. The coercivity was found to drop steeply with increasing temperature. This may be attributed to the superparamagnetic behavior of the Fe-O surface layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358217
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  • 8
    Electronic Resource
    Electronic Resource
    Soft magnetic properties of Fe–Zr–B thin films (abstract) : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5152-5152 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The Fe–Zr–B system has been shown to exhibit superior soft magnetic properties in melt-spun ribbons. These ribbons with composition Fe87Zr7Cu3B3 had very low coercivity (0.02 Oe) and high magnetization (190 emu/g) after crystallization at 540 °C from the amorphous state. We have recently extended these studies to thin films with similar composition. These films were prepared by dc magnetron sputtering from a solid alloy target. Transmission electron microscopy and differential scanning calorimetry were used to study the evolution of the microstructure upon annealing. Magnetic measurements were taken with a hysteresigraph. Unlike the as-spun ribbon samples, the as-sputtered films showed 10 nm crystallities. Selected area diffraction patterns indicated a two phase microstructure, with the bcc phase which gave rise to the soft magnetic properties in the ribbons, coexisting with a second phase leading to degraded soft magnetic properties (Hc=20 Oe and Ms=150 emu/g). Subsequent annealing of the thin film samples enhanced the formation of the second phase and further degraded the soft magnetic properties. Work is currently underway to determine a means of suppressing the formation of the secondary phase while preserving the phase with superior soft properties. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361537
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  • 9
    Electronic Resource
    Electronic Resource
    Magnetoresistance in (Fe–Co)/Ag films : The 6th joint magnetism and magnetic materials (MMM)−intermag conferenc (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 6799-6801 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The structural and magnetotransport properties of (FeyCo1−y)100−xAgx films were studied as a function of composition. Giant magnetoresistance (GMR) values were measured in these granular films, with the best GMR obtained for the composition (Fe0.33Co0.67)27Ag73, with values of 29% at 30 K and 11.7% at 300 K. XRD and TEM results have shown a fcc crystal structure with a relatively homogeneous microstructure. Magnetic data for the samples with the best GMR indicate a superparamagnetic behavior. The narrow peak in thermomagnetic data and low blocking temperature suggest a small and uniform size distribution of magnetic granules. A summary of the electrical transport properties is presented, in relation to the structural, microstructural, and magnetic properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358134
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  • 10
    Electronic Resource
    Electronic Resource
    Effect of preparation technique on the structural and magnetic properties of granular Fe-SiO2 (abstract) : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5302-5302 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Previous studies have shown that large coercivities, exceeding 2 kOe, can be obtained in Fe-based ceramic granular films. The coercivities were also found to be sensitive to the type of matrix material used, being higher in the SiO2 matrix. In this study the hysteresis behavior of FeX(SiO2)1−X granular films was studied as a function of the preparation technique. The films were prepared by dc magnetron sputtering over the composition range of xv=0.1–0.9 volume fraction of Fe. Tandem deposition both with and without titanium sublimation, and deposition from a composite target were used in preparing the films, which resulted in different oxygen environments. Coercivity measurements were found to be strongly composition dependent, with maximum values up to 700 Oe at xv≈0.5 of Fe, for all sets of samples. Typical granular structure was observed, with grain size in the range of 5–20 nm, with the smaller size obtained from composite targets. X-ray diffraction and selected area diffraction showed a structure of a-Fe (bcc). Thermomagnetic curves showed a peak which can be associated with the onset of superparamagnetism. By varying the deposition method and the oxygen environment, we were able to switch from a relatively magnetically hard sample (Hc∼500 Oe) to a soft sample (Hc∼20 Oe). Mossbauer data are being analyzed to determine the presence of any oxides, their magnetic state and their effect on hysteresis. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361358
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