Issue 37, 2014

Oxygen-driven competition between low-dimensional structures of Sr3CoMO6 and Sr3CoMO7−δ with M = Ru, Ir

Abstract

We have realized a reversible structure transformation of one-dimensional 1D K4CdCl6-type Sr3CoMO6 with the Co2+/M4+ cation ordering into the two-dimensional 2D double layered Ruddlesden–Popper structure Sr3CoMO7−δ with a random distribution of Co and M (with M = Ru, Ir) upon increasing the partial oxygen pressure. The combined soft and hard X-ray absorption spectroscopy studies show that under transformation, Co and M cations were oxidized to Co3+ and M5+. During oxidation, high-spin Co2+ in Sr3CoMO6 first transforms into high-spin Co3+ in oxygen-deficient Sr3CoMO7−δ, and then further transforms into low-spin Co3+ in fully oxidized Sr3CoMO7 upon further increasing the partial pressure of oxygen. The 1D Sr3CoMO6 compound is magnetically ordered at low temperatures with the magnetic moments lying along the c-axis. Their alignment is parallel for Sr3CoRuO6 and antiparallel for Sr3CoIrO6. The 2D compounds reveal a spin-glass-like behavior related to the random distribution of magnetic cations in the structure.

Graphical abstract: Oxygen-driven competition between low-dimensional structures of Sr3CoMO6 and Sr3CoMO7−δ with M = Ru, Ir

Article information

Article type
Paper
Submitted
24 Jun 2014
Accepted
28 Jul 2014
First published
28 Jul 2014

Dalton Trans., 2014,43, 13883-13891

Oxygen-driven competition between low-dimensional structures of Sr3CoMO6 and Sr3CoMO7−δ with M = Ru, Ir

D. Mikhailova, P. Reichel, A. A. Tsirlin, A. M. Abakumov, A. Senyshyn, K. M. Mogare, M. Schmidt, C. Kuo, C. Pao, T. Pi, J. Lee, Z. Hu and L. H. Tjeng, Dalton Trans., 2014, 43, 13883 DOI: 10.1039/C4DT01893A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements