Abstract
The superconducting characteristics on the itinerant ferromagnetic superconductor UGe2 have been investigated via the 73Ge-NQR measurements under pressure (P) near the critical pressure Px where the first-order transition takes place from the low-temperature (T) and low-P ferromagnetic phase (FM2) to high-T and high-P one (FM1). The measurements of nuclear spin-lattice relaxation rate 1 / T1 have revealed a power-law like behavior as Tn without the coherence peak, whereas at low temperatures, it deviates from the Tn dependence to a T-linear like behavior. These results that depend on the pressure are well understood in terms of non-unitary spin-triplet pairing state where the ferromagnetic up-spin band is gapped, but the down-spin band remains gapless at the Fermi level. We will argue an intimate relationship of the onset of SC with FM1 and FM2.
Original language | English |
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Pages (from-to) | 963-964 |
Number of pages | 2 |
Journal | Physica B: Condensed Matter |
Volume | 378-380 |
Issue number | SPEC. ISS. |
DOIs | |
Publication status | Published - 2006 May 1 |
Keywords
- First-order phase transition
- Itinerant ferromagnetism
- NQR under pressure
- Nonunitary state
- UGe
- Unconventional superconductivity
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering