Superconductivity in ion-beam-mixed layered Au-Si thin films

Journal Article · Mon Apr 01 00:00:00 EST 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.7749· OSTI ID:5493103

Jisrawi, N M; McLean, W L ^[1]; Stoffel, N G; Hegde, M S; Chang, C C; Hart, D L; Hwang, D M; Ravi, T S; Wilkens, B J ^[2]; Sun, J Z; Geballe, T H ^[3]

---

1. Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08855 (USA)
2. Bell Communications Research, Redbank, New Jersey 07701 (USA)
3. Department of Applied Physics, Stanford University, Stanford, California 94305 (USA)

The superconducting properties of thin films made by mixing alternating layers of Au and Si using ion-beam bombardment correlate with the formation of metastable metallic phases in what is otherwise a simple eutectic system. Transmission-electron-microscopy measurements reveal the superconducting phases to be amorphous. Compound formation and the nature of Au-Si bonding in these metastable phases are demonstrated from x-ray photoelectron spectroscopy and from a previous study of x-ray-absorption spectroscopy. After mixing with a beam of Xe ions, multilayered films with an average nominal composition Au{sub {ital x}}Si{sub 1{minus}{ital x}}, where {ital x}=0.2, 0.4, 0.5, 0.72, and 0.8, exhibited superconducting transition temperatures in the range 0.2--1.2 K. A double transition feature in the magnetic field dependence of the resistivity is attributed to the formation of more than one metastable metallic phase in the same sample as the ion dose increases.

• OSTI ID: 5493103
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 43:10; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
GOLD
ION COLLISIONS
SUPERCONDUCTIVITY
SILICON
ABSORPTION SPECTROSCOPY
AMORPHOUS STATE
ELECTRIC CONDUCTIVITY
FILMS
LAYERS
MAGNETIC FIELDS
MIXTURES
TRANSITION TEMPERATURE
TRANSMISSION ELECTRON MICROSCOPY
X RADIATION
COLLISIONS
DISPERSIONS
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTRON MICROSCOPY
ELEMENTS
IONIZING RADIATIONS
METALS
MICROSCOPY
PHYSICAL PROPERTIES
RADIATIONS
SEMIMETALS
SPECTROSCOPY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
360104* - Metals & Alloys- Physical Properties