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  • 1
    Electronic Resource
    Electronic Resource
    Annealing effects for implanted Y-Ba-Cu-O superconductors (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 936-938 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Annealing effects of Y-Ba-Cu-O superconductor thin films implanted by 200-keV Ne+ have been investigated. Transition temperature (Tc) end points for 0, 1×1014, 1×1015, and 1×1016 ions/cm2 doses are 75, 71, 62, and 16 K, respectively. The film implanted at 1×1017 ions/cm2 dose indicates nonsuperconductors. The c-lattice constant increases were observed for the implanted films. It is confirmed that the superconducting characteristics for film, which is implanted at 1×1016 ions/cm2 dose, are recovered by annealing in O2 atmosphere at 940 °C for 4 h. Moreover, microcrystal growth caused by annealing the implanted film was observed on the surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341897
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  • 2
    Electronic Resource
    Electronic Resource
    Magnetic properties of a new hard magnet alloy (Fe40Co40Mn20)98.6−xCxSi1.4 (x∼0.4) (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 4164-4166 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new hard magnet alloy, (Fe40Co40Mn20)98.6−xCxSi1.4(x∼ 0.4) was developed. The alloy permits heavy cold-working wherein optimum magnetic properties can be obtained by a suitable heat-treatment after the cold-working, that is, bHc=54.9–63.7 kA/m, Br=0.24–0.47 T, and (BH)max=5.6–11.2 kJ/m3. The alloy retains its high temperature fcc form (nonmagnetic phase) by a quenching, whereas a cold-working produces a small volume of ferromagnetic phase which is transformed in a martensitic style. Heat-treatment at about 400–600 °C causes a bcc phase precipitation, resulting in a fine lamella mixture of magnetic and nonmagnetic phases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335476
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation of Ti-Zr-B ternary amorphous alloys by a single-roller melt-spinning technique and their thermal stability (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 4795-4799 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Continuous ribbons of Ti-Zr-B ternary alloys, consisting of early transition metal and metalloid elements, were formed by a single-roller melt-spinning method. Details of the quenching method employing a modified levitation melting technique are herein described. Amorphous phases were obtained in the composition range of 15 at. %≤B≤25 at. % and 20 at. %≤Zr≤50 at. %. The crystallization of the amorphous alloy took place in two steps. Initially, the amorphous phase changed polymorphously into a boron supersaturated bcc-like phase, and then this bcc-like phase decomposed into a bcc phase and a (Ti, Zr)B compound phase. The crystallization temperature was extraordinarily low (∼320 °C) in contrast to the high melting point and the strong chemical bonding between the metal and metalloid elements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338340
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  • 4
    Electronic Resource
    Electronic Resource
    Single-roller rapid quenching of high melting temperature alloys using plasma-arc melting (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 396-400 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A single-roller rapid quenching apparatus with a plasma-arc torch and a water-cooled copper hearth has been developed for the rapid quenching of high melting temperature alloys (mp〉2000 °C). Details of the apparatus and a mathematical analysis of thermal conditions during the quenching process are described together with the results obtained from high melting temperature alloy experiments. Amorphous ribbons were obtained from Nb80Si20, Nb3Ge, and Ta–(Si,B) alloys. Amorphous Nb3Ge ribbon was successfully converted into an A15 single phase by heat treatment, and showed a superconducting transition temperature as high as 18.3 K. Crystallization of Ta80Si10B10 amorphous ribbon was observed at a very high temperature of 1233 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337661
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  • 5
    Electronic Resource
    Electronic Resource
    Preparation of Bi-Sr-Ca-Cu-O thin film by coevaporation and its thermal stability (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 572-574 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin film with a high Tc single phase was prepared on a (100)MgO substrate at a substrate temperature of about 620 °C by coevaporation of Bi2O3, Sr, Ca, and Cu metal. The resistive superconducting transition with onset Tc of 80 K was observed for this film. By post-deposition annealing at 850 °C, the high Tc phase was transformed into a low Tc phase, while films annealed at a higher temperature such as 890 °C maintained the high Tc phase. These results indicated that the high Tc phase can exist only at the high-temperature region (∼890 °C) while the stable phase existing at the low-temperature region (∼850 °C) is the low Tc phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101460
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  • 6
    Electronic Resource
    Electronic Resource
    Effects of low-frequency modulation on rf discharge chemical vapor deposition (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 1263-1265 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Low-frequency square-wave modulation of a rf discharge in silane diluted with a rare gas brought about an improvement in the deposition rate of amorphous hydrogenated silicon films and in the film quality as well as a drastic suppression of powder concentration in the discharge space. These results can be explained by a SiH3 density in the modulated discharge that is high compared to that without modulation, because of the electron density enhancement resulting from the modulation and also because the lifetime of SiH3 radicals is much longer than those of SiHn radicals (n=0–2).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.100445
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  • 7
    Electronic Resource
    Electronic Resource
    Composition dependence of superconducting properties in Bi2(Sr1−xCax)n+1CunOy (n=2, 3) thin films (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 1213-1215 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin films of the Bi2(Sr1−xCax)n+1CunOy (n=2, 3) system were prepared on (100)MgO substrates by coevaporation of Bi2O3, Sr-Ca alloy, and Cu metal. The lattice constant of the c axis of the low Tc (∼85 K) phase (n=2) decreased with increasing Ca composition x. The superconducting transition temperatures of both the low Tc phase and high Tc (∼110 K) phase (n=3) decreased with increasing x. These tendencies indicated that both the low Tc phase and the high Tc phase have a mutual solubility between Ca and Sr atoms in this Bi system and that the Tc 's of these two phases are related to the c-axis lattice constant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.100668
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  • 8
    Electronic Resource
    Electronic Resource
    As-grown superconducting Bi-Sr-Ca-Cu-O thin films by coevaporation (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 702-704 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Superconducting Bi-Sr-Ca-Cu-O thin films have been prepared on (100) MgO substrates at about 600 °C by coevaporation. The c-axis lattice constant of this system was controlled to the values of 24–43 A(ring) by changing film composition. Superconducting transition temperatures of these films were affected by substrate temperature and by a post-deposition annealing at a low temperature. The highest zero resistance temperature (Tc, zero) of the as-grown Bi2(Sr,Ca)3Cu2Ox film was 79 K. The best Bi2(Sr, Ca)4Cu3Ox film showed an onset temperature of 105 K and Tc, zero zero of 78 K after annealing at 400 °C for 1 h.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101574
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  • 9
    Electronic Resource
    Electronic Resource
    Sepabeads FP series: New packing materials for industrial-scale separation of biopolymers (1988)
    Springer
    Chromatographia 25 (1988), S. 647-651 
    Details
    ISSN: 1612-1112
    Keywords: Anion-exchange chromatography ; Industrial-scale chromatography ; Protein separation ; Sepabeads FP series
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Sepabeads FP series with a variety of anion-exhanger type functional groups have been examined as largescale chromatographic separation media for proteins. The adsorption-desorption behavior of proteins has been found to be dependent mainly on the type and partly on the content of the attached amino ligands. The effect of the attached groups are discussed using batch measurement data. It has been found that the existence of ethanol residue on the nitrogen atom incrases the hydrophilic nature of quaternary ammonium type packings and thus gives a higher protein adsorption capacity. Among weakly basic type anionexchangers, polyethyleneimine-modified packings showed very large protein capacities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02327665
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  • 10
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    Electronic structure and positron annihilation inLaB6andCeB6 (1989)
    American Physical Society
    Details
    Publication Date: 1989-05-01
    Print ISSN: 0163-1829
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society
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