Non-destructive characterisation of dopant spatial distribution in cuprate superconductors
Artikel i vetenskaplig tidskrift, 2020
Proper characterisation of investigated samples is vital when studying superconductivity as impurities and doping inhomogeneities can affect the physical properties of the measured system. We present a method where a polarised neutron imaging setup utilises the precession of spin-polarised neutrons in the presence of a trapped field in the superconducting sample to spatially map out the critical temperature for the phase transition between superconducting and non-superconducting states. We demonstrate this method on a superconducting crystal of the prototypical high-temperature superconductor (La,Sr)2CuO4. The results, which are backed up by complementary magnetic susceptibility measurements, show that the method is able to resolve minor variations in the transition temperature across the length of the LSCO crystal, caused by inhomogeneities in strontium doping.
Cuprates
Spatial doping distribution
Superconductivity
Polarised neutron imaging
Författare
A. E. Ţuţueanu
Niels Bohr Institute
Institut Laue-Langevin
M. Sales
Danmarks Tekniske Universitet (DTU)
K. L. Eliasen
Roskilde Universitet (RUC)
M. E. Lǎcǎtuşu
Niels Bohr Institute
Danmarks Tekniske Universitet (DTU)
J. C. Grivel
Danmarks Tekniske Universitet (DTU)
N. Kardjilov
Helmholtz
I. Manke
Helmholtz
M. Krzyzagorski
Helmholtz
Yasmine Sassa
Chalmers, Fysik, Materialfysik
Martin Andersson
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Uppsala universitet
S. Schmidt
Danmarks Tekniske Universitet (DTU)
K. Lefmann
Niels Bohr Institute
Physica C: Superconductivity and its Applications
0921-4534 (ISSN)
Vol. 575 1353691Ämneskategorier
Materialkemi
Annan fysik
Den kondenserade materiens fysik
DOI
10.1016/j.physc.2020.1353691