Title

Signatures of a Quantum Griffiths Phase in a D-Metal Alloy Close to Its Ferromagnetic Quantum Critical Point

Abstract

We report magnetization measurements close to the ferromagnetic quantum phase transition of the d-metal alloy Ni1-xVx at a vanadium concentration of xc ≈ 11.4%. In the diluted regime (x > xc), the temperature (T) and magnetic field (H) dependences of the magnetization are characterized by nonuniversal power laws and display H/T scaling in a wide temperature and field range. The exponents vary strongly with x and follow the predictions of a quantum Griffiths phase. We also discuss the deviations and limits of the quantum Griffiths phase as well as the phase boundaries due to bulk and cluster physics.

Department(s)

Physics

Keywords and Phrases

Cluster physics; Griffiths phase; Magnetization measurements; Metal alloys; Power law; Quantum critical points; Quantum phase transitions; Vanadium concentration; Ferromagnetic materials; Ferromagnetism; Magnetic fields; Magnetization; Quantum theory; Vanadium; Phase transitions

International Standard Serial Number (ISSN)

0953-8984

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2011 Institute of Physics - IOP Publishing, All rights reserved.

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