01628nas a2200289   4500008004100000022001400041245008800055210006900143260007900212300001100291490000700302520063900309653002200948653001900970653001700989653002101006653002501027653001801052653002901070653001801099653001401117100001901131700002501150700001901175700002501194856011901219       2009                        eng d  a1098-012100aMagnetic characteristics of nanocrystalline multiferroic BiFeO3 at low temperatures0 aMagnetic characteristics of nanocrystalline multiferroic BiFeO3   aONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USAbAMER PHYSICAL SOCcAUG  a0644230 v803 a<p>The magnetic characteristics of nanocrystalline BiFeO3 with average crystallite sizes of similar to 50 and similar to 100 nm are evaluated by studying the temperature and field dependence of magnetization at low temperatures. Different properties such as magnetization, coercivity, and remanence show evidence for changes in the magnetic properties associated with the phase transitions at low temperatures, reported from Raman studies. Detailed field-cooled and zero-field-cooled magnetization measurements show that the likely origin of the changes in the magnetic characteristics is from the changes in the domain structure.</p>10abismuth compounds10acoercive force10acrystallites10amagnetic domains10amagnetic transitions10aMultiferroics10aNanostructured materials10aRaman spectra10aremanence1 aVijayanand, S.1 aMahajan, Mangesh, B.1 aPotdar, H., S.1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/magnetic-characteristics-nanocrystalline-multiferroic-bifeo3-low-temperatures-001830nas a2200313   4500008004100000022001400041245009600055210006900151260012500220300001100345490000700356520068900363653002201052653002501074653001701099653002801116653002901144653002401173653002101197653001801218653001801236653002901254653002101283653002201304100001901326700001901345700002501364856012701389       2009                        eng d  a0003-695100aOrigin of high room temperature ferromagnetic moment of nanocrystalline multiferroic BiFeO30 aOrigin of high room temperature ferromagnetic moment of nanocrys  aCIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USAbAMER INST PHYSICScMAY  a1825070 v943 a<p>Single phase nanocrystalline BiFeO3 of average crystallite size similar to 25 nm with very high magnetization at room temperature is synthesized by an autocombustion method. Magnetic measurements above room temperature show deviation between field cooled and zero field cooled magnetization below 645 K, the Neel temperature (T-N) of the bulk material, indicating intrinsic nature of ferromagnetism. However, observation of a broad magnetic transition above T-N of BiFeO3 and extended up to 800 K suggests the presence of Fe3O4 as a possible magnetic impurity phase. Evidence for the presence of Fe3O4 is obtained from detailed analysis of the powder x-ray diffraction pattern.</p>10abismuth compounds10aCombustion synthesis10acrystallites10aferromagnetic materials10ahigh-temperature effects10amagnetic impurities10aMagnetic moments10aMagnetisation10aMultiferroics10aNanostructured materials10aNeel temperature10aX-ray diffraction1 aVijayanand, S.1 aPotdar, H., S.1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/origin-high-room-temperature-ferromagnetic-moment-nanocrystalline-multiferroic-bifeo3-0