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Descripción
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| The perovskite polymorph of Mn2CrSbO6 compound has been synthesized at 8 GPa and 1473 K. It crystallizes in the monoclinic P21/n space group with cell parameters a = 5.2180 (2) Å, b = 5.3710(2) Å, c = 7.5874(1) Å and ? = 90.36(1)°. Magnetic susceptibility and magnetization measurements show the simultaneous antiferromagnetic ordering of Mn2+ and Cr3+ sublattices below TN = 55 K with a small canting. Low temperature powder neutron diffraction reveals a commensurate magnetic structure with spins confined to the ac-plane and a propagation vector ? = [1/2 0 1/2]. The thermal treatment of this compound induces an irreversible phase transition to the ilmenite polymorph, which has been isolated at 973 K and crystallizes in R3¯ space group with cell parameters a = 5.2084 (4) Å and c = 14.4000 (11) Å. Magnetic susceptibility, magnetization and powder neutron diffraction data confirm the antiferromagnetic helical ordering of spins in an incommensurate magnetic structure with ? = [00 0.46] below 60 K, and the temperature dependence of the propagation vector up to ? = [00 0.54] at about 10 K. | |
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Internacional
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JCR del ISI
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Título de la revista
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Dalton Transactions |
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ISSN
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1477-9226 |
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Factor de impacto JCR
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4,097 |
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Información de impacto
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Datos JCR del año 2013 |
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Volumen
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44 |
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DOI
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Número de revista
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Desde la página
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832 |
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Hasta la página
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836 |
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Mes
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SIN MES |
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Ranking
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