Synthesis and magnetic properties of rare earth ruthenates, <i>Ln</i><sub>5</sub>Ru<sub>2</sub>O<sub>12</sub> (<i>Ln</i>=Pr, Nd, Sm–Tb)
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en
Article de revue
This item was published in
Journal of Solid State Chemistry. 2009, vol. 182, n° 5, p. 1164-1170
Elsevier
English Abstract
Single crystals of <i>Ln</i><sub>5</sub>Ru<sub>2</sub>O<sub>12</sub> (<i>Ln</i>=Pr, Nd, Sm–Tb) were grown out of either NaOH or KOH fluxes in sealed silver tubes. The crystals of all the phases were observed to be twinned ...Read more >
Single crystals of <i>Ln</i><sub>5</sub>Ru<sub>2</sub>O<sub>12</sub> (<i>Ln</i>=Pr, Nd, Sm–Tb) were grown out of either NaOH or KOH fluxes in sealed silver tubes. The crystals of all the phases were observed to be twinned as confirmed by TEM studies. The series crystallize in the <i>C</i>2/<i>m</i> monoclinic system with lattice parameters, <i>a</i>=12.4049(4)–12.7621(6) Å, <i>b</i>=5.8414(2)–5.9488(3) Å, <i>c</i>=7.3489(2)–7.6424(4) Å, <i>β</i>=107.425(3)–107.432(2)° and <i>Z</i>=2. The crystal structure is isotypic with the defect/disorder model of <i>Ln</i><sub>5</sub>Re<sub>2</sub>O<sub>12</sub> (<i>Ln</i> = Y, Gd) and consists of one dimensional edge shared RuO<sub>6</sub> octahedral chains separated by a two dimensional <i>Ln</i>O<i><sub>x</sub></i> polyhedral framework. Magnetic measurements indicate paramagnetic and antiferromagnetic behavior for <i>Ln</i>=Nd, Sm–Gd and <i>Ln</i>=Tb, respectively.Read less <
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