scholarly journals Measurement of Oxygen Disorder and Nano-Twin Microstructure Associated with Columnar Defects In Ybco

1998 ◽  
Vol 540 ◽  
Author(s):  
Y. Yan ◽  
T. Walther ◽  
M.A. Kirk
Keyword(s):  
Ion Irradiation ◽  
Heavy Ion ◽  
High Energy ◽  
High Dose ◽  
Twin Boundaries ◽  
High Tc ◽  
Heavy Ion Irradiation ◽  
Transmission Electron ◽  
Columnar Defects ◽  
Lattice Images

AbstractStudies of defects generated by high energy (>1 GeV) heavy ion irradiation in high-Tc superconductors have been performed by transmission electron microscopy (TEM). Our study shows that high dose irradiation leads to the formation of nano-twins, by which the columnar defects are connected. An analysis of the local Fourier components of the image intensity in [001] lattice images indicates that these new "twin" boundaries are much more diffuse than preexisting twin boundaries in YBCO. The mechanism of the formation of nano-twin boundaries on {110} planes and their possible relation to superconducting properties are discussed.

Defect Structure of High-Tc Superconductor by High-Energy Heavy Ion Irradiation

2000 ◽  
pp. 314-316 ◽  
Author(s):  
Masato Sasase ◽  
Takahiro Satou ◽  
Satoru Okayasu ◽  
Hiroki Kurata ◽  
Kiichi Hojou
Keyword(s):  
Defect Structure ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
High Energy ◽  
High Tc ◽  
High Tc Superconductor ◽  
Heavy Ion Irradiation

Smart Properties of an Irradiated High-Tc Superconductor

2008 ◽  
Vol 54 ◽  
pp. 227-230
Author(s):  
A. Balogh ◽  
I. Kirschner ◽  
Gy. Kovács ◽  
Cs. Mészáros
Keyword(s):  
Ion Irradiation ◽  
Hysteresis Loops ◽  
Heavy Ion ◽  
High Energy ◽  
Atomic Weight ◽  
Nanometer Scale ◽  
Microstructural Stability ◽  
High Tc ◽  
Heavy Ion Irradiation ◽  
New Information

Effects of high-energy, heavy ion irradiation on the properties of Y-Ba-Cu-O high-Tc superconductors are examined. The irradiating medium consists of accelerated Bi-ions, having atomic weight of 114.82. The detected hysteresis loops have very different forms and sizes in unirradiated and in irradiated states, referring to the strong effect of the irradiation. Striking variations of critical current- and magnetic parameters up to the extent of 30-40% in this series of specimens were detected. Their direct reason can be looked for in the change of the atomicmolecular microstructure of the specimens, as an effect due to the irradiation. This is decided by both of the energy and density of the ions arriving onto the surface of the samples [1,2]. It means that the effect produced by the irradiating individual ions depends also on the exact local place of the specimens, on nanometer scale, determined by their given molecular structure, bonding relationships and microstructural stability. In this way, the irradiation experiments can provide some new information on the atomic-molecular properties of the specimens in question. As a genuine smart material, the Y1Ba2Cu3O7-d high-Tc superconductor is able to reply to any external influence, changing its own qualities according to that effect.

Surface modification by high-energy heavy-ion irradiation in various crystalline ZnO facets

2021 ◽  
Vol 23 (39) ◽  
pp. 22673-22684
Author(s):  
Adéla Jagerová ◽  
Romana Mikšová ◽  
Oleksander Romanenko ◽  
Iva Plutnarova ◽  
Zdeněk Sofer ◽  
...  
Keyword(s):  
Optical Properties ◽  
Surface Modification ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
High Energy ◽  
Heavy Ion Irradiation ◽  
Surface Nanostructures ◽  
The Creation

The high-energy ion irradiation induces the creation of ZnO surface nanostructures affecting optical properties, which may be promising for photocatalysis and optoelectronics.

scholarly journals Interaction between Al and atomic layer deposited (ALD) ZrN under high-energy heavy ion irradiation

2019 ◽  
Vol 164 ◽  
pp. 788-798 ◽  
Author(s):  
Sumit Bhattacharya ◽  
Xiang Liu ◽  
Yinbin Miao ◽  
Kun Mo ◽  
Zhi-Gang Mei ◽  
...  
Keyword(s):  
Ion Irradiation ◽  
Atomic Layer ◽  
Heavy Ion ◽  
High Energy ◽  
Heavy Ion Irradiation

scholarly journals Heavy-Ion Irradiation Induced Diamond Formation in Carbonaceous Materials

1998 ◽  
Vol 540 ◽  
Author(s):  
T. L. Daulton ◽  
R. S. Lewis ◽  
L. E. Rehn ◽  
M. A. Kirk
Keyword(s):  
Ambient Temperature ◽  
Ion Irradiation ◽  
Metastable Phase ◽  
Radioactive Decay ◽  
Heavy Ion ◽  
High Energy ◽  
High Energy Particle ◽  
Acid Dissolution ◽  
Heavy Ion Irradiation ◽  
Particle Tracks

AbstractMetastable phase formation under highly non-equilibrium thermodynamic conditions within high-energy particle tracks are investigated. In particular, the possible formation of diamond by heavy-ion irradiation of graphite at ambient temperature is examined. This work was motivated, in part, by an earlier study which discovered nanometer-grain polycrystalline diamond aggregates of submicron-size in uranium-rich carbonaceous mineral assemblages of Precambrian age. It was proposed that these diamonds were formed within the particle tracks produced in the carbonaceous minerals by the radioactive decay of uranium. To test the hypothesis that nanodiamonds can form by ion irradiation, fine-grain polycrystalline graphite sheets were irradiated with 400 MeV Kr ions to low fluence (6 × 1012 ions-cm−2). The ion-irradiated (and unirradiated control) graphite were then subjected to acid dissolution treatments to remove the graphite and isolate any diamonds that were produced. These acid residues were characterized by transmission electron microscopy. The acid residue of the ion-irradiated graphite was found to contain nanodiamonds (at several ppm of bulk), demonstrating that ion irradiation of graphite at ambient temperature can produce diamond.

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