Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radiation Damage and Thermal Recovery of Perovskite Superconductor
  Yttrium Barium Copper Oxide   High temperature superconducting materials are being considered to generate
the magnetic fields required for the confinement of plasma in fusion reactors.
The present study aims to assess the microstructural degradation resulting from
ion implantation at room temperature under two implantation conditions in
Yttrium Barium Copper Oxide (YBCO) tapes. Xray Diffraction (XRD) and high
resolution characterisation techniques including Atom Probe Tomography (APT)
and Transmission Electron Microscopy (TEM) analyses were used to correlate
alterations in superconducting behaviour measured using a Magnetic Properties
Measurement System (MPMS) to amorphization and recovery caused by ion
implantation. TEM analysis was performed to depth profile the degree of
crystallinity (or lack thereof) on irradiated samples. SRIM predicted the
damage depth at 900 nm below the sample surface of the 2 MeV Xe implanted
sample and 450 nm beneath the surface of the 0.6 MeV Xe implanted sample. 2 MeV
Xe implantation caused the superconducting temperature to decrease by 10 K and
the critical current density to display a 10 fold reduction. Post irradiation
heat treatments up to 600C caused recrystallisation of the irradiated layer,
but also oxygen loss and alterations in grain size. The recrystallised grain
orientation was random in TEM lamellae, however, bulk samples re-grew along the
original crystal orientation provided that some of the original material was
not amorphized (ie if they nucleated on crystalline YBCO). This is extremely
promising for the thermal recovery of tokamak components.

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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ph
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The categories of this paper are: solv-int
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The categories of this paper are: math
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-bio
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The categories of this paper are: stat
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The categories of this paper are: supr-con