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Related Experiment Video

Updated: Jul 9, 2026

TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method
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Alloy-ceramic oxide multilayer mirrors for water-window soft x rays.

S Vitta, M Weisheit, T Scharf

    Optics Letters
    |December 1, 2007
    PubMed
    Summary
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    Researchers developed Ni(80)Nb(20)-MgO alloy-ceramic oxide multilayers using pulsed-laser deposition. These multilayers exhibit low interface roughness, making them suitable for soft x-ray mirrors.

    Area of Science:

    • Materials Science
    • Nanotechnology
    • X-ray Optics

    Background:

    • Alloy-ceramic oxide multilayers are crucial for advanced optical applications.
    • Pulsed-laser deposition (PLD) is a versatile technique for fabricating thin films and multilayers.
    • Soft x-ray optics require materials with specific reflective properties and low interface roughness.

    Purpose of the Study:

    • To fabricate and characterize Ni(80)Nb(20)-MgO alloy-ceramic oxide multilayers.
    • To investigate the structural properties and interface characteristics of these multilayers.
    • To assess the potential of these multilayers as soft x-ray mirrors.

    Main Methods:

    • Fabrication of multilayers using pulsed-laser deposition (PLD).
    • Characterization using grazing-incidence x-ray reflectivity (GIXR).

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  • Analysis of atomic structure and interface roughness.

    • Main Results:

    • Successfully fabricated Ni(80)Nb(20)-MgO multilayers with a 3.56-nm period.
    • Achieved very low interface roughness (~0.35 nm) at Ni(80)Nb(20)-MgO and MgO-Ni(80)Nb(20) interfaces.
    • Observed amorphous atomic structure in both Ni(80)Nb(20) and MgO layers, consistent with PLD conditions.
    • Attained a peak reflectivity of ~38% at the first order.

    Conclusions:

    • The fabricated Ni(80)Nb(20)-MgO multilayers possess excellent structural properties, including low interface roughness.
    • These multilayers demonstrate significant potential for use as efficient soft x-ray mirrors.
    • The performance characteristics are suitable for applications in the water-window region (284–500 eV).