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Quantum Griffiths phase inside the ferromagnetic phase of Ni1-xVx.

Wang, Ruizhe and Gebretsadik, Adane and Ubaid-Kassis, Sara and Schroeder, Almut and Vojta, Thomas and Baker, Peter J. and Pratt, Francis L. and Blundell, Stephen J. and Lancaster, Tom and Franke, Isabel and Möller, Johannes S. and Page, Katharine (2017) 'Quantum Griffiths phase inside the ferromagnetic phase of Ni1-xVx.', Physical review letters., 118 (26). p. 267202.


We study by means of bulk and local probes the d-metal alloy Ni1-xVx 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.

Item Type:Article
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Publisher statement:Reprinted with permission from the American Physical Society: Physical Review Letters 118, 267202 © (2017) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:30 May 2017
Date deposited:05 July 2017
Date of first online publication:28 June 2017
Date first made open access:No date available

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