Abstract
Electrical resistivity ρ of a weak itinerant ferromagnet ZrZn 2 with a low residual resistivity ρ0 ≃ 0.46 μΩcm was measured under hydrostatic pressure P up to 3.2 GPa. T 2-behavior of ρ, a hallmark of Fermi liquid, was not observed down to 1 K not only at around the ferromagnetic critical point Pc ∼ 2 GPa but over an entire pressure range investigated. The temperature dependence of ρ at low temperatures evolved from T5/3 in the ferromagnetic phase to T3/2 in the paramagnetic phase. This change, however, was very weak and it was hard to capture the signature of critical point in the resistivity. Such a breakdown of Fermi liquid over a remarkably wide phase space indicates the lack of some ingredient in the description of magnetic quantum critical point in clean metals.
Original language | English |
---|---|
Article number | 043704 |
Journal | journal of the physical society of japan |
Volume | 76 |
Issue number | 4 |
DOIs | |
Publication status | Published - Apr 2007 |
Externally published | Yes |
Keywords
- High pressure
- Non-Fermi liquid
- Quantum critical point
- Weak ferromagnet
- ZrZn
ASJC Scopus subject areas
- Physics and Astronomy(all)