Ramesha, K. ; Thangadurai, V. ; Sutar, D. ; Subramanyam, S. V. ; Subbanna, G. N. ; Gopalakrishnan, J. (2000) ALaMnBO6 (A=Ca, Sr, Ba; B=Fe, Ru) double perovskites Materials Research Bulletin, 35 (4). pp. 559-565. ISSN 0025-5408
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00255...
Related URL: http://dx.doi.org/10.1016/S0025-5408(00)00248-8
Abstract
We report the synthesis and investigation of electrical and magnetic properties of double perovskites of the formula ALaMnBO6 for A = Ca, Sr, Ba and B = Fe, Ru. Powder X-ray diffraction (XRD) shows formation of cubic/pseudocubic perovskite structure for all the phases, with no obvious long-range ordering of B-site cations. Electron diffraction, however, reveals an ordering of Mn and Ru in ALaMnRuO6, showing a doubling of the primitive cubic perovskite cell. While the B = Fe phases are paramagnetic insulators, the B = Ru phases are ferrimagnetic semiconductors. It is likely that in the B = Ru phases, a valence equilibrium exists between MnIII/RuIV and MnII/RuV states that is biased toward the latter.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | A. Oxides; B. Chemical Synthesis; C. X-ray Diffraction; D. Electrical Properties; D. Magnetic Properties |
| ID Code: | 12738 |
| Deposited On: | 11 Nov 2010 09:02 |
| Last Modified: | 02 Jun 2011 11:00 |
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