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Colossal magnetoresistance oxides: phenomena and questions

Ramakrishnan, TV (1998) Colossal magnetoresistance oxides: phenomena and questions. In: Philosophical Transactions of the Royal Society of London Series A Mathematical, Physical and Engineering Sciences, 356 (1735). pp. 41-55.


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Some unusual electronic properties of doped manganites are described. The low temperature resistivity of the metallic ferromagnet has a large $T^2$ term. The residual resistivity can be much larger than the Mott maximum, and depends exponentially on spontaneous magnetization. There is much evidence for strong spatial and temporal fluctuation effects. The available theories are discussed in the light of these phenomena, and it is suggested that a novel localizing mechanism is at work, leading to extreme sensitivity of physical properties to small atomic changes.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the Royal Society.
Keywords: colossal magnetoresistance;residual resistivity;fluctuation effects;oxygen isotope effect;charge ordering;optical conductivity
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: M.K Anitha
Date Deposited: 13 Jan 2005
Last Modified: 19 Sep 2010 04:15
URI: http://eprints.iisc.ac.in/id/eprint/1443

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