TY - JOUR
T1 - Non-destructive characterisation of dopant spatial distribution in cuprate superconductors
AU - Tutueanu, Ana-Elena
AU - Sales, Morten
AU - Eliasen, Kira Lieberkind
AU - Lacatusu, Monica-Elisabeta
AU - Grivel, Jean-Claude
AU - Kardjilov, Nikolay
AU - Manke, I.
AU - Krzyzagorski, Mark
AU - Sassa, Yasmine
AU - Andersson, Martin S.
AU - Schmidt, Søren
AU - Lefmann, Kim
PY - 2020/8/15
Y1 - 2020/8/15
N2 - 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.
AB - 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.
KW - Superleder
KW - Neutronspredning
KW - Neutronimaging
KW - Polariserede neutroner
UR - https://ars.els-cdn.com/content/image/1-s2.0-S0921453420300423-mmc1.xml
U2 - 10.1016/j.physc.2020.1353691
DO - 10.1016/j.physc.2020.1353691
M3 - Journal article
VL - 2020
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 575
M1 - 1353691
ER -