Abstract
We report magnetization measurements close to the ferromagnetic quantum phase transition of the d-metal alloyNi1 − xVx at a vanadiumconcentration of xc≈11.4%. Inthe diluted regime (x > xc), the temperature (T)and magnetic field (H) dependences of the magnetization are characterized by nonuniversal power laws and displayH/T scaling in a wide temperature and field range. The exponents vary strongly withx and follow the predictions of a quantum Griffiths phase. We also discuss the deviations andlimits of the quantum Griffiths phase as well as the phase boundaries due to bulk andcluster physics.
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