title: Synthesis and characterization of the crystal structure and magnetic properties of the ternary manganese vanadate NaMnVO4.
abstract: A new ternary manganese vanadate, NaMnVO(4), was synthesized by solid state reaction route, and its crystal structure and magnetic properties were characterized by X-ray diffraction, magnetic susceptibility and specific heat measurements, and by density functional calculations. NaMnVO(4) crystallizes in the maricite-type structure with space group Pnma, a = 9.563(1) A, b = 6.882(1) A, c = 5.316(1) A, and Z = 4. NaMnVO(4) contains MnO(4) chains made up of edge-sharing MnO(6) octahedra, and these chains are interlinked by VO(4) tetrahedra. The magnetic susceptibility has a broad maximum at T(max) = 24 K and follows the Curie-Weiss behavior above 70 K with θ = -62 K. NaMnVO(4) undergoes a three-dimensional antiferromagnetic ordering at T(N) = 11.8 K. The spin exchanges of NaMnVO(4) are dominated by the intrachain antiferromagnetic exchange, and the interchain spin exchanges are spin-frustrated. The most probable magnetic structure of the ordered magnetic state below T(N) was predicted on the basis of the extracted spin exchanges.
authors: ICMCB, CNRS, Université Bordeaux 1, 87 Avenue du Docteur Schweitzer, 33608 Pessac Cedex, France. benyahia.hamdi@voila.fr
authors: Hamdi
authors: H
authors: Ben Yahia
authors: Etienne
authors: E
authors: Gaudin
authors: Khalid
authors: K
authors: Boulahya
authors: Jacques
authors: J
authors: Darriet
authors: Won-Joon
authors: WJ
authors: Son
authors: Myung-Hwan
authors: MH
authors: Whangbo