Quantum Griffiths phase inside the ferromagnetic phase of Ni\(_{1-x}\)V\(_x\)

We study by means of bulk and local probes the d-metal alloy Ni\(_{1-x}\)V\(_x\) close to the quantum critical concentration, \(x_c \approx 11.6\%\), where the ferromagnetic transition temperature vanishes. The magnetization-field curve in the ferromagnetic phase takes an anomalous power-law form wi...

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Bibliographic Details
Published in:arXiv.org 2017-07
Main Authors: Wang, Ruizhe, Gebretsadik, Adane, Ubaid-Kassis, Sara, Schroeder, Almut, Vojta, Thomas, Baker, Peter J, Pratt, Francis L, Blundell, Stephen J, Lancaster, Tom, Franke, Isabel, Möller, Johannes S, Page, Katharine
Format: Article
Language:English
Subjects:
Ferromagnetic phases
Ferromagnetism
Legal issues
Muon spin rotation
Nickel
Phase transitions
Transition temperature
Variations
Online Access:Get full text
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Summary:We study by means of bulk and local probes the d-metal alloy Ni\(_{1-x}\)V\(_x\) close to the quantum critical concentration, \(x_c \approx 11.6\%\), where the ferromagnetic transition temperature vanishes. The magnetization-field curve in the ferromagnetic phase takes an anomalous power-law form with a nonuniversal exponent that is strongly \(x\)-dependent and mirrors the behavior in the paramagnetic phase. Muon spin rotation experiments demonstrate inhomogeneous magnetic order and indicate the presence of dynamic fluctuating magnetic clusters. These results provide strong evidence for a quantum Griffiths phase on the ferromagnetic side of the quantum phase transition.
ISSN:2331-8422
DOI:10.48550/arxiv.1612.07207