YbFe2Ge2 heavy fermion system under pressure

We report on measurements of the electrical resistivity of the new heavy fermion compound YbFe2Ge2 under high pressures up to . Pressure induces a quantum phase transition, from a non-magnetic to a magnetically ordered (Mo) state, with a quantum critical point (QCP) at . Around the QCP, a linear tem...

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Published inJournal of magnetism and magnetic materials Vol. 310; no. 2; pp. e206 - e208
Main Authors Larrea, J J, Fontes, M, Baggio-Saitovitch, E, Abd-Elmeguid, M M, Plessel, J, Ferstl, J, Geibel, C, Continentino, M
Format Journal Article
LanguageEnglish
Published 01.03.2007
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Summary:We report on measurements of the electrical resistivity of the new heavy fermion compound YbFe2Ge2 under high pressures up to . Pressure induces a quantum phase transition, from a non-magnetic to a magnetically ordered (Mo) state, with a quantum critical point (QCP) at . Around the QCP, a linear temperature dependence of the resistivity reveals a non-Fermi liquid behavior ascribed to the two dimensional antiferromagnetic (AF) fluctuations. Beyond the QCP, the magnetic regime is described by spin-wave (SW) excitations characteristic of AF ordering.
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ISSN:0304-8853
DOI:10.1016/j.jmmm.2006.10.709