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Title

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

AuthorsYusuf, S. M.; Teresa, José María de CSIC ORCID ; Ritter, C.; Serrate, David CSIC ORCID; Ibarra, M. Ricardo CSIC ORCID; Yakhmi, J. V.; Sahni, V. C.
KeywordsCritical points
Lanthanum compounds
Dysprosium compounds
Calcium compounds
Colossal magnetoresistance
Magnetic transitions
Neutron diffraction
Magnetic susceptibility
Strongly correlated electron systems
Issue DateOct-2006
PublisherAmerican Physical Society
CitationPhysical Review - Section B - Condensed Matter 74(14): 144427.1-144427.6 (2006)
AbstractWe 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.
Description6 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
URIhttp://hdl.handle.net/10261/19507
DOI10.1103/PhysRevB.74.144427
ISSN1098-0121
Appears in Collections:(ICMA) Artículos

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