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Title: The emergence of magnetic properties in (Pb{sub 0.845}Sm{sub 0.08}Fe{sub 0.035})(Ti{sub 0.98}Mn{sub 0.02})O{sub 3} and (Pb{sub 0.88}Nd{sub 0.08})(Ti{sub 0.98}Mn{sub 0.02})O{sub 3} perovskite ceramics

The emergence of magnetic properties and quadratic magnetoelectric coupling in a material with outstanding ferroelectric properties has been pursued. Thus, the multiferroicity driven by the substitution of rare earth R{sup 3+} ions (R = Sm, Nd) on the A-site of PbTiO{sub 3} perovskite ceramics has been investigated. In some samples, a transition element with large ionic radius, like Fe{sup 2+}, has been also added on the A site. Polycrystalline ceramic samples with composition (Pb{sub 1-3x/2-y}R{sub x}Fe{sub y}) (Ti{sub 0.98}Mn{sub 0.02})O{sub 3} (R = Sm; x = 0.08, y = 0.035) and (Pb{sub 1−3x/2}R{sub x})(Ti{sub 0.98}Mn{sub 0.02})O{sub 3} (R = Nd, x = 0.08) have been prepared by conventional solid state ceramic processing, starting from reagent grade oxide powders. X-ray diffraction analysis confirmed the obtaining of a crystalline phase with tetragonal P4 mm symmetry. Transmission electron microscopy and high resolution transmission electron microscopy investigations have been carried out in order to analyze the local structure. Temperature dependence of dielectric permittivity revealed a strong anomaly at the temperature T{sub c} of the paraelectric-ferroelectric phase transition. Transition temperature values depend on the R ion type and are lower than in pure lead titanate by 80–100 K. A broad anomaly of dielectric permittivity is found below 140–180 K, where magnetization also increases due to the quadratic magnetoelectric coupling betweenmore » ferroelectric and magnetic states. For the (Pb{sub 0.845}Sm{sub 0.08}Fe{sub 0.035})(Ti{sub 0.98}Mn{sub 0.02})O{sub 3} composition, the piezoelectric charge coefficient at room temperature was d{sub 31} ∼−6.5 pC/N and the remanent magnetization M{sub r} at room temperature was about 0.1 emu/g.« less
Authors:
 [1] ;  [2] ; ;  [3] ;  [4] ;  [5]
  1. CNR-ISC, Istituto dei Sistemi Complessi, Area della Ricerca di Roma-Tor Vergata, Via del Fosso del Cavaliere 100, I-00133 Roma (Italy)
  2. REGO COM Srl, Calea 13 Septembrie 115, 050716 Bucharest-5 (Romania)
  3. National Institute of Research and Development for Technical Physics, 47 Mangeron Blvd., 700050 Iasi (Romania)
  4. Faculty of Applied Chemistry and Material Science, Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 1-7, Gh. Polizu Street, Bucharest 011061 (Romania)
  5. National Institute of Materials Physics, P.O. Box MG7, Str. Atomistilor 105 bis, Magurele-Bucharest RO-77125 (Romania)
Publication Date:
OSTI Identifier:
22314645
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERAMICS; FERROELECTRIC MATERIALS; IRON IONS; MAGNETIC PROPERTIES; OXIDES; PERMITTIVITY; PEROVSKITE; PHASE TRANSFORMATIONS; RARE EARTHS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0273-0400 K; TITANATES; TRANSITION TEMPERATURE; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION