Jurgen Daniel conducted research on generating columnar defects in superconductors like NbSe2 and YBa2Cu3O7 through heavy ion irradiation. He measured the magnetic anisotropy of these superconductors using a SQUID magnetometer. His goal was to investigate the magnetic anisotropy in high-temperature superconductors with columnar defects. He constructed a rotating sample holder for automated low-temperature magnetization measurements.

1. Anisotropy in Layered Superconductors
Jurgen Daniel - research performed while at UniversitatErlangen-Nurnberg,Germany (Diploma thesis – 1992-1994)
Generation of (columnar) defects in superconductors
through heavy ion irradiation
(Erlangen, HMI, GANIL)
Measurements of magnetic anisotropy
(SQUID magnetometer)
NbSe2
YBa2Cu3O7
Construction and fabrication of a
rotating sample holder for automated
low-temperature magnetization
measurements using a SQUID
magnetometer
Goal: Investigation of the magnetic anisotropy in (high-
temperature) superconductors with columnar defects
M. Kraus, G. Kreiselmeyer, J. Daniel, M. Leghissa, G. Saemann-Ischenko, B. Holzapfel, P. Kummeth, R. Scholz, L.Ya. Vinnikov, "Tailored
defects in High Temperature Superconductors - what can we learn from swift heavy ion irradiation?'', Nucl. Inst. Meth. B 89, 307 (1994)
NbSe2