Multiple Magnetic Structures of Correlated Ce-ions in Intermetallic CeAu2Ge2

Details Multiple Magnetic Structures of Correlated Ce-ions in Intermetallic CeAu2Ge2 Multiple Magnetic Structures of Correlated Ce-ions in Intermetallic CeAu2Ge2

2012-04-19

arxiv.org/abs/1204.4378v1

Physics

Condensed Matter

Strongly Correlated Electrons

Heavy fermion

Scientific paper

Neutron diffraction measurements on a high quality single crystal of CeAu2Ge2 reveal two new magnetic structures that coexist with commensurate long range antiferromagnetic order below the Neel temperature T_N ~ 14 K. The new magnetic structures, which exhibit distinct temperature and field dependencies, are described by both commensurate and incommensurate magnetic structures and introduces new region in the H-T phase diagram. These new experimental observations provide essential information for developing a universal understanding of the magnetic properties of this class of Ce-based CeX2M2 (X = Cu, Ag, Au; M = Ge, Si) compounds, which are prototypes for exploring quantum phase transitions and their interplay with unconventional superconductivity.

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