Abstract
We have carefully measured the DC magnetization of a high-quality single crystal of PrOs4Sb12 down to 60 mK with a special interest in the superconducting phase. The temperature dependence of the magnetization M(T) at 100 Oe exhibits two distinct anomalies at Tc1 = 1.83 K and Tc2 = 1.65 K, in good agreement with the specific heat measurements at zero field. Increasing magnetic field H, both Tc1(H) and T c2(H) move toward lower temperatures without showing a tendency of intersecting to each other. Above 10 kOe, the transition at Tc2(H) appears to merge into a line of the peak effect which is observed near the upper critical field Hc2 in the isothermal M(H) curves, suggesting a common origin for these two phenomena.
Original language | English |
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Pages (from-to) | e183-e185 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 272-276 |
Issue number | SUPPL. 1 |
DOIs | |
State | Published - 2004/05 |
Keywords
- DC magnetization
- H-T phase diagram
- Heavy-fermion supercoductors
- Vortex state
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics