Header menu link for other important links
X
Magnetic, transport, and magnetocaloric properties of double perovskite oxide LaCaMnCo O6
Published in
2009
Volume: 105
   
Issue: 7
Abstract
Magnetic, magnetoresistive, and magnetocaloric properties of a novel double perovskite oxide, namely, LaCaMnCo O6 have been studied. Polycrystalline sample of LaCaMnCo O6 has been synthesized by sol-gel technique. It has cubic crystal structure (space group Fm 3- m) at room temperature. The temperature variation in magnetization reveals a steep increase in magnetization around 168 K (TC). The magnetization does not even saturate at 5 K and a magnetic moment of 0.7 μB f.u. is obtained at 5 K in an applied field of 50 kOe. The electrical resistivity measurement indicates that the material is semiconducting-like in the temperature range of ∼300-50 K and below ∼50 K the sample becomes insulating. A maximum magnetoresistance (MR) of about 8% is found at 200 K in an applied field of 7 T and MR has a negative sign. The magnetocaloric effect is calculated from the magnetization versus temperature data and a maximum magnetic entropy change of 3.1 Jkg K for a field change of 11 kOe is obtained near TC. Thus a moderate magnetocaloric effect is achieved in rather low magnetic fields. © 2009 American Institute of Physics.
About the journal
JournalJournal of Applied Physics
ISSN00218979
Open AccessNo
Concepts (29)
  •  related image
    Applied fields
  •  related image
    Cubic crystal structures
  •  related image
    DOUBLE PEROVSKITE OXIDES
  •  related image
    ELECTRICAL-RESISTIVITY MEASUREMENTS
  •  related image
    FIELD CHANGES
  •  related image
    Low magnetic fields
  •  related image
    Magnetic entropy changes
  •  related image
    Magneto-caloric effects
  •  related image
    Magnetocaloric properties
  •  related image
    MAGNETORESISTIVE
  •  related image
    Polycrystalline samples
  •  related image
    Room temperatures
  •  related image
    SOL-GEL TECHNIQUES
  •  related image
    Space groups
  •  related image
    TEMPERATURE DATUM
  •  related image
    Temperature ranges
  •  related image
    Temperature variations
  •  related image
    Crystal structure
  •  related image
    Electric resistance
  •  related image
    Gelation
  •  related image
    Magnetic field effects
  •  related image
    Magnetic moments
  •  related image
    Magnetization
  •  related image
    Magnetoresistance
  •  related image
    Magnets
  •  related image
    Oxide minerals
  •  related image
    Perovskite
  •  related image
    Thermal effects
  •  related image
    Rare earth alloys