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Closed Access item Possible quantum critical point in (La1−xDyx)0.7Ca0.3MnO3

Authors:Yusuf, S. M.
Teresa, José María de
Ritter, C.
Serrate, David
Ibarra, M. Ricardo
Yakhmi, J. V.
Sahni, V. C.
Keywords:Critical points, Lanthanum compounds, Dysprosium compounds, Calcium compounds, Colossal magnetoresistance, Magnetic transitions, Neutron diffraction, Magnetic susceptibility, Strongly correlated electron systems
Issue Date:Oct-2006
Publisher:American Physical Society
Citation:Physical Review - Section B - Condensed Matter 74(14): 144427.1-144427.6 (2006)
Abstract:We report a study of the possible quantum critical point (QCP) in the rare earth substituted colossal magnetoresistive manganite (La1−xDyx)0.7Ca0.3MnO3 with x=0.347. A magnetic phase diagram has been proposed in the temperature-field-plane based on the neutron diffraction, small-angle neutron scattering, and ac susceptibility results. We show the role of applied magnetic field to tune the QCP driven by quenched disorder. The implications of the observed QCP phenomenon to understand the physics of the CMR effect and Griffiths singularities in strongly correlated electron systems are discussed.
Description:6 pages, 5 figures.-- PACS number(s): 75.30.Kz, 75.40.Cx, 75.47.Gk, 75.47.Lx
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevB.74.144427
Appears in Collections:(ICMA) Artículos

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