Magnetic and transport properties of Mo substituted La{sub 0.67}Ba{sub 0.33}Mn{sub 1-x}Mo{sub x}O{sub 3} perovskite system

The effect of doping Mo for Mn on the magnetic and transport properties of the colossal magnetoresistance material La{sub 0.67}Ba{sub 0.33}MnO{sub 3} has been studied. Compounds of the series La{sub 0.67}Ba{sub 0.33}Mn{sub 1-x}Mo{sub x}O{sub 3}(x=0.0-0.1) have been prepared and found to crystallize...

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Bibliographic Details
Published in:Journal of applied physics 2005-07, Vol.98 (1)
Main Authors: Kundaliya, Darshan C., Vij, Reeta, Kulkarni, R.G., Varughese, B., Nigam, A.K., Malik, S.K., Department of Physics, Saurashtra University, Rajkot-360 005, Department of Physics, Shivaji University, Kolhapur-416 004, Department of Chemistry, University of Maryland, College Park, Maryland 20742, Tata Institute of Fundamental Research, Mumbai-400 005
Format: Article
Language:English
Subjects:
BARIUM COMPOUNDS
CHEMICAL ANALYSIS
CRYSTALLIZATION
FERROMAGNETIC MATERIALS
LANTHANUM COMPOUNDS
MAGNETIZATION
MAGNETORESISTANCE
MANGANESE OXIDES
MATERIALS SCIENCE
MOLYBDENUM OXIDES
ORTHORHOMBIC LATTICES
OXYGEN
PEROVSKITE
SPACE GROUPS
STOICHIOMETRY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TRANSITION TEMPERATURE
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Summary:The effect of doping Mo for Mn on the magnetic and transport properties of the colossal magnetoresistance material La{sub 0.67}Ba{sub 0.33}MnO{sub 3} has been studied. Compounds of the series La{sub 0.67}Ba{sub 0.33}Mn{sub 1-x}Mo{sub x}O{sub 3}(x=0.0-0.1) have been prepared and found to crystallize in the orthorhombic structure (space group Pbnm). Energy dispersive x-ray analysis measurements confirm the stoichiometry of all the samples. Magnetotransport and magnetization measurements reveal that the metal-insulator transition temperature (T{sub p}) decreases from 330 K for x=0 to 255 K for x=0.1. The change in T{sub p} on Mo substitution is relatively much smaller than the corresponding change observed on substitution by other transition elements, such as Ti, Fe, Co, Ni, etc. Further, the ferromagnetic transition temperature (T{sub C}) is nearly unchanged by Mo substitution. This is in striking contrast to the large decrease in T{sub C} observed with substitution of the above-mentioned 3d elements. These unusual magnetic and transport properties of La{sub 0.67}Ba{sub 0.33}Mn{sub 1-x}Mo{sub x}O{sub 3} may be either due to the formation of a magnetic pair between Mn and Mo or due to strong Mo(4d)-O(2p) overlap, which in turn, may affect the Mn-Mn interaction via the oxygen atoms.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1947897