Low temperature synthesis, structure and magnetic properties of Mn2[VO4]F

• Main Authors: Daisuke Mori, Hamdi Ben Yahia, Masahiro Shikano, Nobuyuki Imanishi, Yoshiyuki Inaguma, Ilias Belharouak
• Format: Article
• Language: English
• Published: Taylor & Francis Group 2017-12-01
• Series: Journal of Asian Ceramic Societies
• Subjects: Hydrothermal synthesis; Mix anion compound; Weak ferromagnetism; Single crystal
• Online Access: http://www.sciencedirect.com/science/article/pii/S2187076417301288

The compound Mn2[VO4]F was synthesized using a hydrothermal synthesis route at low temperature and its crystal structure was determined from single crystal X-ray diffraction data. Mn2[VO4]F was characterized by magnetic susceptibility and specific heat capacity measurements. Mn2[VO4]F crystallizes with the triplite-type structure, space group C2/c, a = 13.451(3) Å, b = 6.6953(16) Å, c = 10.126(3) Å, β = 116.587(4)°, V = 815.6(3) Å3 and Z = 8. The structure consists of a 3D-framework built up of VO4 tetrahedra, and manganese (II) polyhedra which form chains running along the [101] and [010] directions. The coordination of the manganese cations and the connectivity between the manganese polyhedra are not defined clearly due to the disorder of the fluoride anions which form zigzag chains along [001]. The magnetic susceptibility follows a Curie–Weiss behavior above 50 K with Θ = −88 K indicating that predominant magnetic interactions are antiferromagnetic. The specific heat capacity and magnetization measurements show that Mn2[VO4]F undergoes a three-dimensional magnetic ordering at TN = 30 K and a canted weak ferromagnetism due to mixed-anion effect.