Justin Jeanneau, Pierre Toulemonde, Gyorgy Remenyi, André Sulpice, Claire Colin, Vivian Nassif, Emmanuelle Suard, Eduardo Salas Colera, Germán R Castro, Frederic Gay, Corina Urdaniz, Ruben Weht, Clement Fevrier, Arnaud Ralko, Claudine Lacroix, Armando A Aligia, Manuel Núñez-Regueiro
We perform an extensive study of Sr_{3}Cr_{2}O_{7}, the n=2 member of the Ruddlesden-Popper Sr_{n+1}Cr_{n}O_{3n+1} system. An antiferromagnetic ordering is clearly visible in the magnetization and the specific heat, which yields a huge transition entropy, Rln(6). By neutron diffraction as a function of temperature we have determined the antiferromagnetic structure that coincides with the one obtained from density functional theory calculations. It is accompanied by anomalous asymmetric distortions of the CrO_{6} octahedra...
May 19, 2017: Physical Review Letters