Frustrated magnetism in Eu-based intermetallic systems
Intermetallic compounds EuIr2P2, EuPtSi and EuPtGe order antiferromagnetically at TN=5, 4.1 and 3.3 K, respectively, although positive Curie-Weiss temperatures indicate predominantly ferromagnetic interactions. In addition, substantial magnetic fluctuations subsist well above TN, as attested by specific heat measurements on all three compounds. These observations point to a certain degree of magnetic frustration as a consequence of competing magnetic interactions, and in the case of the equiatomic compounds, favored by the particular lattice geometry. Furthermore, in all three materials, the absence of inversion symmetry in the crystal structure favors chiral magnetism. Neutron powder diffraction will allow us to determine the magnetic structure of these intermetallic compounds, and characterize its temperature evolution. This is an essential step to understanding the interplay between the spin lattice geometry, the chirality of the crystal structure and the competition of different exchange interactions in these systems.
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FRANCO Diego Gaspar; CUELLO Gabriel; Henry E. Fischer; GEIBEL Christoph; SEIRO Silvia and STOCKERT Oliver. (2018). Frustrated magnetism in Eu-based intermetallic systems. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2537
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