Molecular dynamics simulations of radiation damage in YBa2Cu3O7

Gray, Rebecca and Rushton, Michael J. D. and Murphy, Samuel T (2022) Molecular dynamics simulations of radiation damage in YBa2Cu3O7. Superconductor Science and Technology, 35 (3). ISSN 0953-2048

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Abstract

Abstract The advent of High Temperature Superconductors (HTS) with high field strengths offers the possibility of building smaller, cheaper magnetically confined fusion reactors. However, bombardment by high energy neutrons ejected from the fusion reaction may damage the HTS tapes and impair their operation. Recreating the conditions present in an operational fusion reactor is experimentally challenging, therefore, this work uses molecular dynamics simulations to understand how radiation modifies the underlying crystal structure of YBa2Cu3O7. To facilitate the simulations a new potential was developed that allowed exchange of Cu ions between the two symmetrically distinct sites without modifying the structure. Radiation damage cascades predict the formation of amorphous regions surrounded by regions decorated with Cu and O defects found in the CuO-chains. The simulations suggest that the level of recombination that occurs is relatively low, resulting in a large number of remnant defects and that there is a no substantial temperature effect.

Item Type:
Journal Article
Journal or Publication Title:
Superconductor Science and Technology
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
166821
Deposited By:
Deposited On:
02 Mar 2022 10:35
Refereed?:
Yes
Published?:
Published
Last Modified:
04 May 2022 02:46