ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

ALaMnBO$_6$ (A=5 Ca, Sr, Ba; B =Fe, Ru) double perovskites

Ramesha, K and Thangadurai, V and Sutar, D and Subramanyam, SV and Subbanna, GN and Gopalakrishnan, J (2000) ALaMnBO$_6$ (A=5 Ca, Sr, Ba; B =Fe, Ru) double perovskites. In: Materials Research Bulletin, 35 (4). pp. 559-565.

[img] PDF
0001.pdf - Published Version
Restricted to Registered users only

Download (167kB) | Request a copy
Official URL: http://www.sciencedirect.com/science?_ob=ArticleUR...


We report the synthesis and investigation of electrical and magnetic properties of double perovskites of the formula ALaMnBO$_6 $for A= Ca, Sr, Ba and B = Fe, Ru. Powder X-ray diffraction (XRD) shows formation of cubic/pseudocubic perovskite structure for all the phases, with no obvious long-range ordering of B-site cations. Electron diffraction, however, reveals an ordering of Mn and Ru in ALaMnRuO$_6$, showing a doubling of the primitive cubic perovskite cell. While the B =Fe phases are paramagnetic insulators, the B = Ru phases are ferrimagnetic semiconductors. It is likely that in the B = Ru phases, a valence equilibrium exists between$ Mn^{III}$ /$Ru^{IV}$ and $Mn^{II}$, /$Ru^{V}$ states that is biased toward the latter.

Item Type: Journal Article
Publication: Materials Research Bulletin
Publisher: Elsevier
Additional Information: Copy right belongs to Elsevier
Keywords: Oxides;Chemical synthesis;X-ray diffraction;Electrical properties;Magnetic properties
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 03 Dec 2008 07:39
Last Modified: 19 Sep 2010 04:52
URI: http://eprints.iisc.ac.in/id/eprint/16566

Actions (login required)

View Item View Item