Magnetic properties of a highly ordered single crystal of the layered perovskite YBaCuFe0.95Mn0.05O5

The layered perovskite YBaCuFeO5 (YBCFO) is able to adopt chiral magnetic order up unexpectedly high temperatures, paving the way strong magnetoelectric coupling at room temperature. In this A-site cations are fully ordered whereas occupancy of B-sites strongly depend on preparation process. Though structure not geometrically frustrated, presence partial Fe3+/Cu2+ disorder produces frustration. an effort increase spin–orbit in system, we have synthesized and studied YBaCuFe0.95Mn0.05O5 single crystal form, where highly symmetric Fe3+ ions (3d5) partially substituted with Jahn-Teller active 3d4 Mn3+ ions. We report structural properties a perovskite, which presented comparison polycrystalline specimen (three times more disordered). Single neutron diffraction measurements reveal two collinear phases lack incommensurate spiral order. transitions found grown by traveling solvent floating zone (TSFZ) method described analyzed light its level Fe/Cu cationic (?90%).