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  • American Institute of Physics (AIP)  (5)
  • International Union of Crystallography (IUCr)  (1)
  • Seismological Society of America (SSA)  (1)
  • 1
    Electronic Resource
    Electronic Resource
    High current O+ ion source : Proceedings of fifth international conference on ion sources (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 1325-1326 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A high current O+ ion source is desirable for applications to SIMOX and materials modification. To meet the requirements of this field, a new type of nonfilament high current O+ ion source has been developed successfully in our institute. Using O2 as discharge material, the typical extraction characteristics are as follows: The total oxygen ions current is 100 mA, of which the content of O+ is 80%, beam current density is larger than 200 mA/cm2 when the power consumption is 100 W; therefore the economic property is 1 mA/W. Feeding N2, the total extraction beam current is 100 mA of which 70% is N+ while the power consumption is 135 W.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144999
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  • 2
    Electronic Resource
    Electronic Resource
    Irradiation-induced alloying in immiscible Mo–Cu system through multilayer technique (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 82 (1997), S. 3815-3820 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Room temperature 200 keV xenon-ion irradiation of multilayers, designed under interfacial free energy concern, did result in the formation of Mo–Cu metallic glasses only within a narrow Mo-enriched composition range. In addition, some Cu-based alloys of metastable fcc solid solutions were also formed at different irradiation stages. To obtain a possible thermodynamic interpretation, a Gibbs-free-energy diagram was calculated based on the semiquantitative Miedema's model and the related methods proposed by Alonso. The free energy of the Mo–Cu multilayers including excess interfacial free energy was also estimated and was compared to that of the amorphous state. It turned out that the interfacial free energy stored in the multilayered films could raise the energy level of the multilayers to a state higher than that of the metastable phases and thus played an important part, in comparison to the energy deposited by irradiation, in inducing alloying in this immiscible system. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365744
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  • 3
    Electronic Resource
    Electronic Resource
    Spontaneous vitrification in the Au–Ta system with a small size difference (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 67 (1995), S. 780-782 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Spontaneous vitrification was observed in the Au–Ta system, although the atomic size difference between Au and Ta is very small. It was found that among the various compositions studied, vitrification was only achieved at a composition of around Au23Ta77. Comparative data were obtained by ion mixing of Au–Ta multilayered films to support the spontaneous vitrification results. The amorphization mechanism was discussed in terms of competition between the amorphous phase against the nucleation and growth of the existing equilibrium compound, which explained the favorable composition range as well as the thermal stability of the obtained amorphous alloy. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.115465
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  • 4
    Electronic Resource
    Electronic Resource
    Amorphous films formed by solid-state reaction in an immiscible Y–Mo system and their structural relaxation (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 3096-3098 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Amorphous films of 300 nm thick were obtained by solid state reaction in an immiscible Y–Mo system with a positive heat of mixing being +26 kJ/mol. The experimental results revealed that the Y51Mo49 multilayers, including 19% interfacial atoms, were vitrified by thermal annealing at 300 °C for one and half hours, and that the formed amorphous films recrystallized at about 600 °C. These confirmed that the excess interfacial free energy stored in the multilayered films elevated the initial energetic state of the multilayers to a level higher than that of the amorphous phase, providing a major driving force in solid state amorphization. The elastic modulus and hardness changes of the formed amorphous films upon annealing were characterized by nanoindentation, and the results were in accordance with the proposed free volume model for the amorphous structure. ] © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.116434
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  • 5
    Electronic Resource
    Electronic Resource
    Structure of a new dammarane-type triterpene from Gynostemma pentaphyllum (Thurb.) Makino (1991)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 47 (1991), S. 790-793 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270190008290
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  • 6
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    Effect of L12 ordering in antiferromagnetic Ir-Mn epitaxial layer on exchange bias of FePd films (2015)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2015-04-29
    Description: Two series of samples of single-layer IrMn and IrMn/FePd bilayer films, deposited on a single-crystal MgO substrate at different IrMn deposition temperatures ( T s  = 300–700 °C), were investigated using magnetron sputtering. L 1 2 ordering was revealed for the 30 nm-thick IrMn epitaxial (001) films with T s  ≥ 400 °C, determined by synchrotron radiation x-ray diffractometry (XRD). XRD results also provide evidence of the epitaxial growth of the IrMn films on MgO substrate. Increasing T s from 400 to 700 °C monotonically increases the ordering parameter of L 1 2 phases from 0.17 to 0.81. An in-plane exchange bias field ( H eb ) of 22 Oe is obtained in a 10 nm-thick FePd film that is deposited on the disordered IrMn films. As the L 1 2 ordering of the IrMn layers increases, the H eb gradually decreases to 0 Oe, meaning that the exchange bias behavior vanishes. The increased surface roughness, revealed by atomic force microscopy, of the epitaxial IrMn layers with increasing T s cannot be the main cause of the decrease in H eb due to the compensated surface spins regardless of the disordered and ordered (001) IrMn layers. The change of antiferromagnetic structure from the A 1 to the L 1 2 phase was correlated with the evolution of H eb .
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 7
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    Interseismic Deformation and Earthquake Hazard along the Southernmost Longitudinal Valley Fault, Eastern Taiwan (2012)
    Seismological Society of America (SSA)
    Details
    Publication Date: 2012-08-01
    Description: About half of the 8 cm/yr of oblique convergence across the active convergent plate boundaries of Taiwan occurs in eastern Taiwan, across the Longitudinal Valley. Significant shortening and left-lateral slip occurs across the Longitudinal Valley fault there, both as shallow fault creep and as seismogenic fault slip. The southernmost Longitudinal Valley fault comprises an eastern Peinan strand and a western Luyeh strand. We derive an interseismic block model for these two strands using data from a small-aperture Global Positioning System (GPS) campaign and leveling. The model provides estimates of fault slip rates and quantifies slip partitioning between the two strands. A 45 mm/yr dip-slip rate on the northern Peinan strand diminishes southward, whereas the left-lateral component increases. In contrast, nearly pure dip-slip motion of about 20 mm/yr on the southern Luyeh strand diminishes northward to about 8 mm/yr and picks up a component of left-lateral motion of about 15 mm/yr before it dies out altogether at its northern terminus. The Luyeh and the northern Peinan strands record near-surface creep, but the southern Peinan strand appears locked. The potential earthquake magnitude for the two strands may be as high as M w  6.5. We anticipate seismic rupture mainly on the locked portion of the Peinan strand.
    Print ISSN: 0037-1106
    Electronic ISSN: 1943-3573
    Topics: Geosciences , Physics
    Published by Seismological Society of America (SSA)
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