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  • 2005-2009  (16)
  • 1990-1994  (109)
  • 1985-1989  (54)
  • 1
    Electronic Resource
    Electronic Resource
    Electron correlations in coupled quantum dots (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 1041-1046 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The quantum states of two electrons in a pair of coupled quantum dots confined by heterostructures of compound semiconductors were calculated. As the physical parameters were changed various quantum states of electrons were obtained. The correlation between electrons in these quantum states is analyzed using the mean distance between electrons and its variance. When the quantum states include quadruple degenerate ground states, electrons are localized on each quantum dot and all kinetic movement except spin is frozen. This suggests that a Mott insulator phase will appear in a bulk array of coupled quantum dots. Because coupled quantum dot arrays can be assembled to include both metallic regions and insulating regions without changing the density of electrons, they have great potential in applications for future electron devices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357821
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Rectification effect by a p-n junctioned oxide film (1992)
    s.l. : American Chemical Society
    Langmuir 8 (1992), S. 1-3 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00037a001
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Surface characterization of microporous solids with helium adsorption and small angle x-ray scattering (1993)
    s.l. : American Chemical Society
    Langmuir 9 (1993), S. 2612-2617 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00034a021
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Controlling Bloch lines and domain chopping for multiple stripes aligned in parallel (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 3171-3173 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Controlling vertical Bloch line (VBL) position and stripe domain chopping in multiple stripe domains, aligned in parallel by a period of 12 μm, are studied experimentally using a 5-μm bubble garnet film. Patterned high coercive-force CoPt films aligned in parallel are used for stabilizing the stripe domain. During the stripe stretching process, the VBL motion at the stripe head was controlled by the dc conductor current to get two different wall states: one with a VBL at the stripe head and the other without VBL. Stripe chopping experiments for VBL detection have been performed using hairpin and meandering conductors. We found that the meandering conductor presents excellent characteristics; the bias field margin and the chopping pulse amplitude margin are 58 Oe±6% and 133 mA±11%, respectively, for one stripe. VBL generation by the meandering conductor has also been studied using the same sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340856
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  • 5
    Electronic Resource
    Electronic Resource
    Torque analysis of the perpendicular magnetic anisotropy in Co-Cr films (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 2914-2916 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The tilt angle of the c axis from the film normal in Co-Cr flexible media fabricated by continuous sputter deposition is determined by analyzing torque curves, and is compared with that obtained by x-ray diffraction. A discussion is given concerning the perpendicular anisotropy constant obtained from torque curves with and without considering such a tilt angle of the c axis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340955
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  • 6
    Electronic Resource
    Electronic Resource
    Optical measurement of crack propagation with high resolution (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 1822-1824 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new optical method is established to measure the crack length and its velocity in transparent crystals by utilizing the total reflection of light beam at the cleavage crack plane. The optical system is constructed by using a laser, a PIN photodiode sensor, and a wave memory. With the apparatus the crack propagation velocity can be measured at any desired position inside the specimen with a time resolution of less than 1 μs. The measurement on a cleavage crack in NaCl reveals that the maximum speed of the crack is about 800 m/s and the fluctuation of the velocity occurs prior to the arrest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144017
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  • 7
    Electronic Resource
    Electronic Resource
    Magnetic properties and microstructure of Co-Cr-Pr vertically magnetized films (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 2929-2931 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of Pr on both the magnetic properties and microstructure of Co-Cr alloys is discussed. The saturation magnetization Ms and perpendicular magnetic anisotropy Ku at room temperature is found to increase with Pr, becoming maximum at about 0.5 wt. % Pr, and then decreases monotonously. The microstructure is also changed with Pr, leading to a less-defined columnar structure. However, no significant change is found in the Auger spectra for various contents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340961
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Measurement of magnetic anisotropy constant for magneto-optical recording media: A comparison of several techniques (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 1368-1376 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Experimental data of the intrinsic perpendicular magnetic anisotropy energy constant Ku are presented for amorphous rare earth-transition metal (RE-TM) Tbx(FeCo)1−x and multilayered Co/Pt thin film samples. These data were independently measured using five techniques based on torque magnetometry, the extraordinary Hall effect, and the magneto-optic Kerr effect. In the Hall effect measurement, the external field was applied to the sample in three different ways: fixed at 45° from the film normal; rotating around the sample; and fixed along the in-plane direction. The results obtained with these techniques agree with each other for the Co/Pt samples. However, we do find systematic differences in the measured Ku for the Tbx(FeCo)1−x samples. For example, Ku given by the Hall effect and Kerr effect is always larger (by up to a factor of 3) than that given by torque technique. Another interesting fact is that Ku given by the Hall effect technique drops as x approaches the compensation point xc in the TM-dominant case, but increases as x approaches xc in the RE-dominant case. These experimental results are explained by taking into account the canting between RE and TM subnetworks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353256
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  • 9
    Electronic Resource
    Electronic Resource
    Magnetization reversal and defects in Co/Pt multilayers : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6418-6420 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: (Co 3 A(ring)/Pt 10 A(ring))×N (N=8, 16, and 30 bilayers) multilayer thin films were prepared by sputtering onto an 850-A(ring)-thick SiN layer that had been deposited on a silicon (111) substrate. We used the polar Kerr effect to measure the time dependence of magnetization reversal over the temperature range 90–300 K. Direct domain observations were also carried out. The results show that the domain expansion process depends strongly on the number of bilayers. Uniform domain expansion was found only in the thinner samples. From the time dependence of the magnetization reversal measurements over the temperature range 90–300 K, the activation energy and volume associated with domain wall motion were found to be 1.2 eV and 2.3×10−18 cm3 for N=8 sample. The N=16 and N=30 samples seem to have a broad distribution of activation energies. Our observations suggest that both the coercivity and magnetization reversal are controlled by the defects that come from the interface between the Co and Pt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352618
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Effect of canting on the measured magnetic anisotropy constant for magneto-optical recording media (abstract) : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 5794-5794 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Experimental data of the intrinsic perpendicular magnetic anisotropy energy constant Ku are presented for amorphous rare-earth–transition metal (RE–TM) Tbx(FeCo)1−x and multilayered Co/Pt thin film samples. These data were independently measured using five techniques based on torque magnetometry, the extraordinary Hall effect, and the magneto-optic Kerr effect. In the Hall effect measurement, the external field was applied to the sample in three different ways: fixed at 45° from the film normal; rotating around the sample; and fixed along the in-plane direction. The results obtained with these techniques agree with each other for the Co/Pt samples. However, we do find systematic differences in the measured Ku for the Tbx(FeCo)1−x samples. For example, Ku given by the Hall effect and Kerr effect is always larger (by up to a factor of 3) than that given by torque technique. Another interesting fact is that Ku given by the Hall effect technique drops as x approaches the compensation point xc in the TM-dominant case, but increases as x approaches xc in the RE-dominant case. These experimental results are explained by taking into account the canting between RE and TM subnetworks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353578
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    Paper (German National Licenses)
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