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A -site dependent percolative thermopower and Griffiths phase in Pr (0.7-x)Ho xSr 0.3MnO 3 (x=0.0, 0.04, 0.08, and 0.1)
Published in
2005
Volume: 97
   
Issue: 10
Abstract
We report our analysis of thermopower S (T) of Pr(0.7-x) Hox Sr0.3 Mn O3 (x=0, 0.04, 0.08, and 0.1) compounds within a percolative framework and correlate the results with the existence of a Griffiths phase. The Griffiths temperature, at which ferromagnetic metallic clusters nucleate above TC, is evaluated. We further show that the Griffiths phase extends over a higher temperature range above TC with increase in the variance of ionic radii of the A site. © 2005 American Institute of Physics.
About the journal
JournalJournal of Applied Physics
ISSN00218979
Open AccessNo
Concepts (13)
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    FERROMGNETIC METALLIC CLUSTER
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    Griffiths phase
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    Optical emission spectroscopy
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    PERCOLATIVE THERMOPOWER
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    Colossal magnetoresistance
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    Electron tunneling
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    Free energy
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    Magnetite
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    Manganese
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    Oxidation
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    Positive ions
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    X ray photoelectron spectroscopy
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    Praseodymium compounds