New Ferromagnetic La3Co2TaO9 double perovskite: Structural and Magnetic Properties.

FUERTES V. C.; BLANCO M. C.; D. G. FRANCO; DE PAOLI J. M.; E. V. PANNUNZIO MINER; SÁNCHEZ R.D.; FERNÁNDEZ-DÍAZ, M. T.; CARBONIO R. E

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2009 vol. 404 p. 2717 - 2717

p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: justify">The new double perovskite La3Co2TaO9 has been prepared by a solid-state procedure. The crystal and magnetic structures have been studied from X-ray (XRPD) and neutron powder diffraction (NPD) data. Rietveld refinements were performed in the monoclinic space group P21/n. The structure consists of an ordered array of alternating B?O6 and B?O6 octahedra sharing corners, tilted along the three pseudocubic axes according to the Glazer notation a-b-c+. Rietveld refinements show that at RT the cell parameters are a = 5.6005(7) Å, b = 5.6931(7) Å, c = 7.9429(9) Å and