Influence of BaTiO{sub 3} on Magnetic and Transport Properties of La{sub 0.7}Sr{sub 0.3}MnO{sub 3}-BaTiO{sub 3} Nanocomposite

Journal Article · Fri Mar 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4754-0· OSTI ID:22919564

Navin, Kumar; Kurchania, Rajnish ^[1]

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1. Maulana Azad National Institute of Technology (MANIT), Functional Nanomaterials Laboratory, Nanoscience and Engineering Center, Department of Physics (India)

La{sub 0.7}Sr{sub 0.3}MnO{sub 3} (LSMO)-BaTiO{sub 3} (BTO) nanocomposites have been synthesized by adding different amounts of BTO using the sol-gel method. The structural analysis confirms that both phases coexist in the composite samples with the rhombohedral and tetragonal structure for LSMO and BTO, respectively. The magnetization measurement shows a decrease in magnetization with the increase in BTO concentration and a signature of the spin glass-like characteristics of the nanocomposite. The dielectric behavior indicates the existence of the magneto-electric coupling between LSMO and BTO phase. The measurement of transport properties shows that resistivity increases with BTO concentration and metal-insulator (M-I) transition temperature shifts towards lower temperature. The low-temperature (T < 50 K) resistivity behavior of the samples is analyzed by using the Kondo-like transport model. The results show the spin-disordered scattering increases with the increase in the amount of BTO in LSMO phase. The low-field magnetoresistance (LFMR) of the nanocomposite is improved as compared to the pure LSMO. The highest value of LFMR achieved for LSMO-BTO composite at 10 K is 35.5% with a 1 T magnetic field.

• OSTI ID: 22919564
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 3 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
COMPARATIVE EVALUATIONS
CONCENTRATION RATIO
DIELECTRIC MATERIALS
KONDO EFFECT
LANTHANUM COMPOUNDS
MAGNETIC FIELDS
MAGNETIZATION
MAGNETORESISTANCE
MANGANATES
NANOCOMPOSITES
SCATTERING
SOL-GEL PROCESS
SPIN GLASS STATE
STRONTIUM COMPOUNDS
TITANATES
TRANSITION TEMPERATURE
TRANSPORT THEORY
TRIGONAL LATTICES