01774nas a2200205   4500008004100000022001400041245012000055210006900175260010600244300001400350490000800364520094100372653002001313653002401333653001801357653003001375100001701405700002501422856012101447       2012                        eng d  a0038-109800aEnhanced magnetic parameters in the morphotropic phase boundary region of nanocrystalline multiferroic Bi1-xLaxFeO30 aEnhanced magnetic parameters in the morphotropic phase boundary   aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcAUG  a1609-16120 v1523 a<p>Antiferromagnetic multiferroic BiFeO3 shows ferromagnetic characteristics by simultaneous substitution of Bi by La and decrease in the particle size to nanometer dimensions. Large changes in saturation and remnant magnetization, magnetic susceptibility at low and high fields, along with some anomalous changes in the magnetic transition temperature are observed in nanocrystalline Bi1-xLaxFeO3 system for 0.1 &lt;= x &lt;= 0.2. This compositional region corresponds to the morphotropic phase boundary (MPB) region separating the rhombohedral and orthorhombic phases, and the effect is similar to that observed in many ferroelectric systems. The present observation of enhanced ferromagnetic parameters in the MPB region of the nanocrystalline multiferroic La substituted BiFeO3 system, combined with the known ferroelectric characteristics, is suitable for future device applications. (C) 2012 Elsevier Ltd. All rights reserved.</p>10aBismuth ferrite10amagnetic properties10aMultiferroics10aNanocrystalline materials1 aThakuria, P.1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/enhanced-magnetic-parameters-morphotropic-phase-boundary-region-nanocrystalline-001752nas a2200157   4500008004100000245013400041210006900175260000800244300002700252490000600279520113600285100001801421700001701439700001601456856012201472       2017                        eng d00aStructural, magnetic, dielectric and magnetodielectric properties of Bi1-xCaxFe1-xMnxO3 in the morphotropic phase boundary region0 aStructural magnetic dielectric and magnetodielectric properties   cJAN  aArticle Number: 0161040 v43 aStructural, magnetic, dielectric and magnetodielectric properties of Ca and Mn co-substituted bismuth ferrite, Bi1-xCaxFe1-xMnxO3 (0 <= x <= 0.4) are reported. Structural studies by Rietveld refinement of XRD patterns revealed rhombohedral R3c structure for x <= 0.11 and orthorhombic Pbnm structure for x >= 0.2. For compositions in the range 0.11 < x < 0.2, mixed phase behaviour is observed showing a morphotropic phase boundary (MPB) region. Magnetisation at room temperature increases with increasing Ca and Mn content, showing weak ferromagnetism. Coercivity and remanence initially increase and then decrease with increasing x, showing a maximum for x = 0.175 in the MPB region. Dielectric constant also shows a maximum value in the mixed phase region. Magnetodielectric (MD) studies revealed positive MD for the R3c phase and a negative MD for the Pbnm phase, showing a maximum MD (similar to 1%) for x approximate to 0.1 and crossover at x approximate to 0.175. The studies show strong interplay between the structure and properties, suggesting tuneable bismuth ferrite based compositions for magnetoelectric applications.1 aManjunath, B.1 aThakuria, P.1 aJoy, P., A.  uhttps://library.ncl.res.in/content/structural-magnetic-dielectric-and-magnetodielectric-properties-bi1-xcaxfe1-xmnxo3