Critical behaviour of ZrZn2

F. M. Grosche, C. Pfleiderer, G. J. McMullan, G. G. Lonzarich, N. R. Bernhoeft

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Abstract

The nature of the metallic state of the low temperature itinerant ferromagnet ZrZn2 in the vicinity of a magnetic quantum phase transition has been studied in a series of susceptibility and resistivity measurements under high pressures. A pressure-temperature phase diagram has been constructed on the basis of the susceptibility data. The magnetic transition temperature is observed to follow Tc 4 3 ∼ (pc - p) down to temperatures of order 1 K. No evidence for a first order transition was found at any pressure, but a clearly defined and moderately pressure-dependent maximum was observed in the susceptibility in the paramagnetic regime, i.e. for p > pc. The temperature dependence of the resistivity is found to differ from that of the conventional Fermi liquid model over a wide range of temperature and pressure. The shape of the phase diagram and the observed behaviour of the resistivity have been interpreted in terms of a quantum Ginzburg Landau model for the magnetic fluctuation spectrum.

Original languageEnglish
Pages (from-to)20-22
Number of pages3
JournalPhysica B: Condensed Matter
Volume206-207
Issue numberC
DOIs
StatePublished - 1 Feb 1995
Externally publishedYes

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