INFLUENCE OF Fe/Cu CATIONIC ORDER ON THE MAGNETIC GROUND STATE OF YBaCuFeO5 SINGLE-CRYSTALS
YBaCuFeO5 displays magnetism-driven ferroelectricity (FE) at unexpectedly high temperatures. Electrical polarization develops associated to a spiral magnetic order, whose ordering temperature can be increased by more than 150 K (far beyond RT) by manipulating the Cu/Fe chemical disorder in the bipyramids (Nature Comms 7, 13758 (2016)). However, the competition between the spiral and other collinear orders is very poorly understood. In order to shed light on the relevance of some structural features such as the degree of chemical order or the inter- and intra- bowtie separations (d1/d2) (Science Adv. 4, eaau6386 (2018)) for determining the magnetic (and dielectric) ground state, we aim to investigate a high-quality YBCFO single-crystal where -instead of the incommensurate spiral phase- the groundstate has been substituted by commensurate magnetic states with doubled a and b dimensions.
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Arnau Romaguera; FABELO ROSA Oscar Ramon; Jose Luis Garcia-Muņoz; HERRERO MARTIN Javier and ZHANG XIAODONG. (2020). INFLUENCE OF Fe/Cu CATIONIC ORDER ON THE MAGNETIC GROUND STATE OF YBaCuFeO5 SINGLE-CRYSTALS. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-14-273
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