Non Fermi liquid properties of Ni-V close to the ferromagnetic quantum critical point

ORAL

Abstract

Resistivity ($\rho )$ and magnetization ($M)$ data of the d-metal alloy Ni$_{1-x}$V$_{x}$ are presented in the vicinity of the critical vanadium concentration $x_{c}\approx $11{\%} where the onset of long-range ferromagnetic (FM) order is suppressed to zero temperature. Above x$_{c}$ the temperature ($T)$ dependence of the magnetic susceptibility is best described by simple nonuniversal power laws (e.g. \textit{M/H(T,H$\to $0) $\sim $T}$^{\alpha -1}$ ). Also the resistivity displays power laws (\textit{$\Delta \rho \sim $T}$^{n})$. Both exponents $\alpha $(x) and n(x) vary with x displaying signatures of a disordered quantum phase transition in a metal very different than of a clean 3D FM.

*Supported by NSF (DMR-0306766, DMR-0339147, DMR-0906566) OBR-440653 and Research Corporation.

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Authors

  • Almut Schroeder

    • Kent State University, Kent OH
  • Sara Ubaid-Kassis

    • Kent State University, Kent OH
  • Brendan Wyatt

    • Kent State University, Kent OH
  • Thomas Vojta

    • Missouri University of Science and Technology, Rolla MO