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Inhomogeneous magnetic clusters above the Curie point in Nd0.5CaxSr0.5-xMnO3 (x = 0.1 and 0.3)
Published in
2008
Volume: 10
   
Issue: 11
Pages: 1620 - 1624
Abstract
The presence of inhomogeneous magnetic clusters in Nd0.5CaxSr0.5-xMnO3 (x = 0.1 and 0.3) system has been investigated by dc magnetic susceptibility, magnetoresistance (MR) and ESR studies. The nature of magnetic transitions is found to be of second order in x = 0.1 and is of first order in case of x = 0.3 composition. The ferromagnetic clusters in the paramagnetic region show the signature of Griffiths-like phase for the x = 0.1 sample. The onset of predominant charge-ordered antiferromagnetic correlations above TC results in the deviation from Curie-Weiss law as an upturn in the magnetic susceptibility of x = 0.3 sample. The competition between the FM/AFM interactions arising from A-site cation disorder leads to quenched disorder in this system. © 2008 Elsevier Masson SAS. All rights reserved.
About the journal
JournalSolid State Sciences
ISSN12932558
Open AccessNo
Concepts (29)
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    Antiferromagnetism
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    Calcium
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    Colossal magnetoresistance
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    Electric resistance
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    Magnetic field effects
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    Magnetic properties
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    Magnetic susceptibility
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    Magnetism
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    Magnetoelectronics
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    Magnetoresistance
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    Manganese compounds
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    Manganites
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    Neodymium
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    Oxide minerals
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    Polarons
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    ANTIFERROMAGNETIC CORRELATIONS
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    Curie points
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    DC MAGNETIC SUSCEPTIBILITIES
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    Ferromagnetic clusters
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    First-order
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    Griffiths phase
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    MAGNETIC CLUSTERS
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    Magnetic polarons
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    Magnetic transitions
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    PARAMAGNETIC REGIONS
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    QUENCHED DISORDERS
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    Second orders
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    SITE CATIONS
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    Magnetic materials