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Magnetic and magnetoresistive properties of double perovskite oxides RE-SrMnCoO6 (RE = Nd, La)
Published in
2009
Volume: 45
   
Issue: 10
Pages: 4271 - 4274
Abstract
Polycrystalline samples of NdSrMnCoO6 and LaSrMnCoO6 have been synthesized by sol-gel technique and were characterized by means of x-ray diffraction (XRD). The Rietveld refinement of the XRD data confirms the single phase nature of the samples. These oxides have cubic crystal structure (space group Fm3m) at room temperature. The magnetization data measured in a field of 100 Oe, under zero field cooled and field cooled conditions, show thermomagnetic irreversibility below 210 K. The electrical resistivity of these samples increase with decreasing temperature from 300 K down to 80 K. The conduction above 115 K can be described by variable range hopping mechanism. A maximum magnetoresistance (MR) of about 5% and 11% are achieved at 90 K in an applied field of 7 T for NdSrMnCoO and LaSrMnCoO samples, respectively, and MR has a negative sign. © 2009 IEEE.
About the journal
JournalIEEE Transactions on Magnetics
ISSN00189464
Open AccessNo
Concepts (28)
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    Applied field
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    Cubic crystal structures
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    DOUBLE PEROVSKITE OXIDE
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    DOUBLE PEROVSKITE OXIDES
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    Electrical resistivity
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    ELECTRICAL TRANSPORT AND MAGNETIC PROPERTIES
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    FIELD-COOLED CONDITIONS
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    Magnetization data
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    MAGNETORESISTIVE PROPERTY
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    Polycrystalline samples
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    Room temperature
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    Single phase
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    SOL-GEL TECHNIQUE
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    Space groups
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    Variable range hopping
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    XRD
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    Zero-field-cooled
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    Electric conductivity
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    Electric resistance
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    Magnetic field effects
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    Magnetic properties
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    Magnetoresistance
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    Oxide minerals
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    Perovskite
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    Rietveld method
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    Rietveld refinement
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    X ray diffraction
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    Crystal structure