Electronic phase separation in correlated oxides: The phenomenon, its present status and future prospects

Shenoy, Vijay B and Sarma, DD and Rao, CNR (2006) Electronic phase separation in correlated oxides: The phenomenon, its present status and future prospects. In: ChemPhysChem, 7 (10). pp. 2053-2059.

PDF fulltext.pdf123.pdf - Published Version Restricted to Registered users only Download (400kB) | Request a copy

Abstract

Many transition metal oxide materials of high chemical purity are not necessarily monophasic. Thus, single crystals of chemically pure rare earth manganites and cobaltates of the general formula Ln1-xAxMO3 (Ln=rare earth metal, A=alkaline earth metal, M=Mn, Co) exhibit the phenomenon of electronic phase separation wherein phases of different electronic and magnetic properties coexist. Such phase separation, the length scale of which can vary anywhere between a few nanometers to microns, gives distinct signatures in X-ray and neutron diffraction patterns, electrical and magnetic properties, as well as in NMR and other spectroscopies. While the probe one employs to investigate electronic phase separation depends on the length scale, it is noteworthy that direct imaging of the inhomogeneities has been accomplished. Some understanding of this phenomenon has been possible on the basis of some of the theoretical models, but we are far from unraveling the varied aspects of this new phenomenon. Herein, we present the highlights of experimental techniques and theoretical approaches, and comment on the future outlook for this fascinating phenomenon

Item Type:	Journal Article
Publication:	ChemPhysChem
Publisher:	John Wiley & Sons
Additional Information:	Copyright of this article belongs to John Wiley & Sons.
Keywords:	electronic phase separation •lanthanides •magnetic properties •manganese •oxides.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	28 Sep 2010 08:52
Last Modified:	28 Sep 2010 08:52
URI:	http://eprints.iisc.ac.in/id/eprint/30874

Actions (login required)

View Item