Structural, Magnetic and Dielectric Properties of [(CH3)2NH2]Fe x Mn1-x (HCOO)3

The multiferroic phenomenon has interdisciplinary applications in the fields of chemistry, physics, electronics, materials, crystallography, and mechanics. Compared to traditional limited pure inorganic multiferroics, hybrid metal-organic frameworks are numerous and more flexible, and can be tailored to become different types of multiferroic materials. We synthesized [(CH3)(2)NH2] Fe (x) Mn (x-1)(HCOO)(3) and four crystals were obtained, with x = 0 (Mn), 0.1 (Fe0.1Mn0.9), 0.2 (Fe0.2Mn0.8), and 0.3 (Fe0.3Mn0.7). At the maximum Fe doping of Fe0.3Mn0.7, we observed magnetic properties different from lower-level-doped crystals. The magnetizations at 3 K were 3.50 emu/g, 3.87 emu/g, 3.89 emu/g and 7.38 emu/g corresponding to Mn, Fe0.1Mn0.9, Fe0.2Mn0.8 and Fe0.3Mn0.7, respectively. Fe0.3Mn0.7 has three magnetic transitions, at 118.3 K, 40.3 K, and 8.3 K.