Journal article · Preprint article
Non-destructive characterisation of dopant spatial distribution in cuprate superconductors
University of Copenhagen1
Department of Physics, Technical University of Denmark2
Roskilde University3
Department of Energy Conversion and Storage, Technical University of Denmark4
Functional Oxides, Department of Energy Conversion and Storage, Technical University of Denmark5
Helmholtz Centre Berlin for Materials and Energy6
Chalmers University of Technology7
Uppsala University8
Neutrons and X-rays for Materials Physics, Department of Physics, Technical University of Denmark9
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.
Language: | English |
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Year: | 2020 |
Pages: | 1353691 |
ISSN: | 18732143 and 09214534 |
Types: | Journal article and Preprint article |
DOI: | 10.1016/j.physc.2020.1353691 |
ORCIDs: | 0000-0003-4282-756X , Sales, Morten , Lǎcǎtuşu, Monica-Elisabeta , Grivel, Jean-Claude and Schmidt, Søren |