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

Journal Article · Fri Jul 01 00:00:00 EDT 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1947897· OSTI ID:20713963

Kundaliya, Darshan C; Vij, Reeta; Kulkarni, R G; Varughese, B; Nigam, A K; Malik, S K ^[1]

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1. Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland-20742 (United States)

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.

• OSTI ID: 20713963
• Journal Information: Journal of Applied Physics, Vol. 98, Issue 1; Other Information: DOI: 10.1063/1.1947897; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM COMPOUNDS
CHEMICAL ANALYSIS
CRYSTALLIZATION
FERROMAGNETIC MATERIALS
LANTHANUM COMPOUNDS
MAGNETIZATION
MAGNETORESISTANCE
MANGANESE OXIDES
MOLYBDENUM OXIDES
ORTHORHOMBIC LATTICES
OXYGEN
PEROVSKITE
SPACE GROUPS
STOICHIOMETRY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TRANSITION TEMPERATURE