Spin-fluctuation dominated electrical transport of Ni3Al at high pressure

Details Spin-fluctuation dominated electrical transport of Ni3Al at high pressure Spin-fluctuation dominated electrical transport of Ni3Al at high pressure

2004-11-17

arxiv.org/abs/cond-mat/0411451v1

Phys. Rev. B 72 (2005) 24424

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 10 figures

Scientific paper

10.1103/PhysRevB.72.024424

We present the first study of a magnetic quantum phase transition in the itinerant-electron ferromagnet Ni3Al at high pressures. Electrical resistivity measurements in a diamond anvil cell at hydrostatic pressures up to 100 kbar and temperatures as low as 50 mK indicate that the Curie temperature collapses towards absolute zero at a critical pressure pc=82(2) kbar. Over wide ranges in pressure and temperature, both in the ferromagnetic and paramagnetic states, the temperature variation of the resistivity is found to deviate from the conventional Fermi-liquid form. We consider the extent to which this deviation can be understood in terms of a mean-field model of enhanced spin fluctuations on the border of ferromagnetism in three dimensions.

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