Abstract
We report on muon-spin rotation and relaxation (), electrical resistivity, magnetization and differential scanning calorimetry measurements performed on a high-quality single crystal of . Whereas our transport and magnetization data confirm the bulk character of the superconducting state below , the data indicate that the system is magnetic below , where a first-order transition occurs. The first-order character of the magnetic transition is confirmed by differential scanning calorimetry data. Taken all together, these data indicate in a microscopic coexistence between the superconducting phase and a strong magnetic phase. The observed is the highest reported to date for a magnetic superconductor.
- Received 10 January 2011
DOI:https://doi.org/10.1103/PhysRevLett.106.117602
© 2011 American Physical Society