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Please use this identifier to cite or link to this item: http://hdl.handle.net/10651/5991

Title: Structural and magnetic phases of Fe(ND3)(2)PO4
Author(s): Fernández Alfonso, María Belén Aurora
Trobajo Fernández, María del Camino
Salvado Sánchez, Miguel Ángel
Pertierra Castro, María del Pilar
García-Granda, Santiago
Rodríguez Fernández, Jesús
Fernández Díaz, María Teresa
Blanco Rodríguez, Jesús Ángel
García Menéndez, José Rubén
Issue date: 2008
Publisher version: http://dx.doi.org/10.1088/0953-8984/20/10/104227
Citation: Journal of Physics-Condensed Matter, 20(10), (2008); doi:10.1088/0953-8984/20/10/104227
Abstract: Polycrystalline samples of Fe(ND3)2PO4 were prepared by means of a hydrothermal route and characterized using powder x-ray diffraction, scanning electron microscopy, chemical and thermal analysis, magnetic measurements, specific heat and neutron diffraction experiments. This material orders within an orthorhombic (Pnma space group) crystal structure at room temperature, but below 220 K the crystal structure changes towards a monoclinic P 21/n structure through a phase transition with almost no latent heat. Furthermore, the magnetic cell at 2 K is twice the size of the crystallographic cell observed at 80 K. The magnetic structure associated with the Fe(III) ions is thus commensurate with the crystal lattice having a propagation vector \vec k=(1/2, 0, 0) , the magnetic moments lying in the yz plane of the crystallographic cell.
URI: http://hdl.handle.net/10651/5991
ISSN: 0953-8984
Local identifier: 630
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