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  • 11
    Electronic Resource
    Electronic Resource
    Acid-Base Reactions in Fused Salts. II.1 The Absolute Concentration of NO2+ Ion in Fused Nitrate (1959)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 81 (1959), S. 6378-6379 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01533a010
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  • 12
    Electronic Resource
    Electronic Resource
    Regrowth of the photoquenchable defect relating to the hopping conduction in arsenic-ion-implanted semi-insulating GaAs (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 4488-4490 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The quenching phenomenon in Mott-type hopping conduction below 125 K has been observed in As+-ion-implanted semi-insulating GaAs. The crystallinity of the implanted layer was evaluated using Rutherford backscattering and Raman scattering methods. The hopping conduction was observed in the as-implanted and annealed samples. The as-implanted layer was amorphous, while the annealed layers remained crystalline, consisting of a disordered structure with a displacement fraction of ∼1021 cm−3. In the samples annealed at 500 °C, it is suggested that some of the As precipitates are located on Ga sites, leading to the disappearance of the A1 g Raman active mode of the As clusters. The hopping conduction was photoquenched as the defect concentration reached ∼6×1017 cm−3, indicating the regrowth of the AsGa antisite defects as a main component of EL2. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.363423
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  • 13
    Electronic Resource
    Electronic Resource
    Recording characteristics of Co-γFe2O3 perpendicular magnetic recording media : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 4884-4886 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The recording characteristics of Co-γFe2O3 perpendicular magnetic recording hard disk media were investigated. Sliding contact recording was performed to evaluate the intrinsic high-density recording performance of the media with using a metal-in-gap-type ring head. The half-voltage density D50 of 176 kFRPI and low-density reproduced voltage Ep of 143 nVp-p/[turn μm (m/s)] were obtained for the optimal medium whose Co-γFe2O3 layer thickness was 0.13 μm and perpendicular coercivity was 1800 Oe. The pass wear durability test was performed at 2 m/s, or at a disk rotation of 830 rpm. The reproduced voltage did not decrease with time, and scratches and damage were not observed on the tested track even after 18 000 000 passes. The Co-γFe2O3 medium is one of the candidates for ultrahigh-density recording media because of its specific advantages; superior high density recording performance and hardness tolerable for sliding contact use. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361640
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  • 14
    Electronic Resource
    Electronic Resource
    Co–Cr films prepared by sputtering using electron cyclotron resonance microwave plasma : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 4896-4898 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The sputtering deposition using an electron cyclotron resonance (ECR) microwave plasma was tried to use in the fabrication of the Co–Cr perpendicular magnetic recording media. As the Ar sputtering gas pressure increased from 4×10−2 to 8×10−2 Pa, the Co(002) x-ray diffraction peak intensity increased and the half-value width of the rocking curve Δθ50 decreased. This result implies that Co–Cr films with high perpendicular orientation and good crystallinity are achieved at high Ar gas pressure. The Co–Cr films deposited at a target to substrate distance of 230 mm had a good preferred crystal orientation (Δθ50 less than 4°), high perpendicular magnetic anisotropy (Hk higher than 4 kOe), and high perpendicular coercivity over 1400 Oe even though the Co–Cr thickness is as small as about 50 nm, and no underlayers were introduced. Thus, the ECR sputtering has high potential in the deposition of the Co–Cr films for ultrahigh density recording media. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361925
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  • 15
    Electronic Resource
    Electronic Resource
    Scanning magnetoresistance microscopy (SMRM): Imaging with a MR head : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 4696-4698 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have developed a new scanning magnetic microscopy that uses commercial magnetoresistive (MR) record/playback heads as sense probes. A high-resolution, linearized positioning stage is used to raster scan a magnetic sample with respect to the MR head while the head is in physical contact with the sample. An upper bound on the spatial resolution of the scanning magnetoresistance microscope (SMRM) is 100 nm in the "downtrack" direction and 1–2 μm in the "crosstrack" direction of the head. Magnetic force microscopy has better spatial resolution than SMRM, but SMRM gives a more quantifiable signal since the MR head response can be calibrated in a uniform external field. Furthermore, SMRM has the unique ability to apply localized fields to the sample via the inductive write element. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365530
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  • 16
    Electronic Resource
    Electronic Resource
    Fabrication and characterization of nanoscale arrays of nickel columns : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 4730-4732 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have fabricated arrays of high aspect ratio nickel columns in both PMMA and SiO2, and we have characterized their structure using transmission electron microscopy and scanning electron microscopy. We have also characterized the magnetics of the columns with magnetic force microscopy. Such characterization of high aspect ratio perpendicular magnetic particles is only rarely found in the literature. This work lays a foundation for further studies to test the viability of lithographically defined arrays of magnetic particles as an alternative high density storage medium. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365444
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  • 17
    Electronic Resource
    Electronic Resource
    Sputter epitaxy of cerium yttrium iron garnet films on neodymium gallium garnet substrates : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 5653-5655 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present the experimental results on the in situ epitaxial growth of cerium substituted yttrium iron garnet films on three different single crystalline substrates by use of the magnetron sputtering, in particular, paying attention to the films deposited on the neodymium gallium garnet. Intrinsic properties of the grown films such as lattice constant, specific Faraday rotation, and hysteresis have been measured. We have found that the sign of the lattice mismatching between the film and the substrate is important for the enhancement of the magneto-optic effect, and the lattice matching is attainable by changing the oxygen gas flow rate while growing the crystal. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.364685
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  • 18
    Electronic Resource
    Electronic Resource
    Tip-surface interactions studied using a force controlled atomic force microscope in ultrahigh vacuum (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 70 (1997), S. 2238-2240 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A magnetic force has been used to control a partially magnetized atomic force microscope cantilever in ultrahigh vacuum in order to investigate tip-surface interactions. It is shown that forces applied by an oscillating tip can drastically affect the measured response of the lever. In particular the oscillating force influences the measured tip-surface adhesion and can be treated as a simple addition to the static applied force in breaking adhesive bonds. Qualitative differences in force spectroscopy measurements due to the amplitude of the driving oscillation of the lever are presented and an alternative nonintrusive technique introduced. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.118826
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  • 19
    Electronic Resource
    Electronic Resource
    Scanning magnetoresistance microscopy (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 3263-3265 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have developed a new scanning magnetic microscopy which uses commercial magnetoresistive (MR) record/playback heads as sense probes. Two-dimensional magnetic images are constructed by bringing the MR head into physical contact with the sample, and then acquiring MR voltage while the head is raster scanned using a high resolution (∼1 nm), linearized positioning stage. With currently available MR heads, an upper bound on the spatial resolution is 0.1×2.0 μm. This technique has broad applications beyond the magnetic storage media for which these heads were designed. In addition to magnetic imaging, this instrument can also be used to evaluate contact record and playback processes. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.118030
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  • 20
    Electronic Resource
    Electronic Resource
    Improvements in the differential phase shift of magneto-optic waveguides by loading with high refractive index overlayers (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 406-408 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Experimental results are presented for a nonreciprocal phase shift of vertically polarized waves in four-layer magneto-optic rib waveguides. The structure consists of a high refractive index nonmagnetic layer of titanium oxide on top of a magneto-optic film (a lanthanum and gallium substituted yttrium iron garnet film on a gadolinium gallium garnet substrate) to improve differential phase characteristics. The difference of phase constants for waves traveling in opposite directions is evaluated by observing the variation in the polarization coupled out of a straight waveguide when simultaneously exciting both horizontally and vertically polarized waves with equal amplitudes and phases. The phase shift difference varies with the thickness of the nonmagnetic film, and is larger than that of a previous three-layer waveguide in the overlayer thickness range 0.15–0.45 μm. The maximum phase shift obtained is 2.5 times as large as that of uncoated waveguides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101567
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