Characterization of superconducting samples by measurement of the « Residual Resistivity Ratio » (RRR) (Φ ≤ 0.15 m, h ≤ 1 m, 4.5 K ≤ T ≤ 300 K) and measurement of the first critical field HC1 (Φ ≤ 0.3 m, h ≤ 1.33 m, 2 K ≤ T ≤ 40 K).
- One cryostat (useful dimensions: h = 1.33 m and Φ = 30 cm), with a removable bottom insert, currently used for first critical field HC1 measurements by local magnetometry (B ≤ 150 mT), but adaptable to other experiments,
- One cryostat (useful dimensions: h = 1 m and Φ = 15 cm) used for RRR measurements,
Achievements, related projects
LabCaF devices are mainly used in the framework of R&D projects (in the early stages).
For example, they were used for the characterization of nano-composite superconductors in the framework of the EuCard-2 project (measurement of the first critical field HC1 by local magnetometry).
Industrial services were also performed at the LabCaF (in particular on the RRR experiment).
Technical steps, expertise
Remark regarding HC1 measurements: some connections (electrical circuit, instrumentation…) can be done under a mounting plate, before placing the removable bottom insert in the cryostat.