02294nas a2200241   4500008004100000022001400041245010300055210006900158260008700227300001200314490000700326520137000333653002301703653002301726653002201749653003701771653002201808100002001830700001501850700003301865700002501898856012901923       2005                        eng d  a0095-244300aCure characteristics and dielectric properties of magnetic composites containing strontium ferrite0 aCure characteristics and dielectric properties of magnetic compo  a1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLANDbSAGE PUBLICATIONS LTDcAPR  a109-1210 v373 a<p>Hexagonal strontium ferrite (SrFe12O19) powders were synthesized by the conventional ceramic techniques. They were then characterized by the X-ray diffraction method and incorporated in the natural rubber matrix according to a specific recipe for various loadings of ferrite to produce rubber ferrite composites (RFCs). The processability of these compounds was determined by evaluating the cure characteristics namely, scorch time, cure time, minimum and maximum torque. The evaluation of the dielectric properties of ceramic strontium ferrite (SrF), natural rubber gum vulcanizate, and RFCs were done with the help of a Hewlett Packard (HP) impedance analyzer. The magnetic properties of these composites were studied using a Vibrating Sample Magnetometer (VSM). The effect of carbon black on the processability, and the magnetic and dielectric properties were also studied by the incorporation of carbon black into these composites. It has been found that the addition of these ferrites and carbon black does not affect the processability of these composites, whereas the physical properties are found to be modified. From the magnetic and dielectric measurements it has been found that flexible magnets having appropriate dielectric strength can be prepared by the incorporation of appropriate amount of SrF and carbon black in the natural rubber matrix.</p>10ahexagonal ferrites10aMagnetic materials10apermanent magnets10arubber ferrite composites (RFCs)10astrontium ferrite1 aSoloman, M., A.1 aKurian, P.1 aAnantharaman, Maliemadom, R.1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/cure-characteristics-and-dielectric-properties-magnetic-composites-containing-strontium-001510nas a2200217   4500008004100000022001400041245005400055210005300109260010300162300001000265490000700275520078400282100001401066700001601080700002501096700001801121700001501139700001701154700003301171856008801204       2010                        eng d  a0295-507500aColossal thermoelectric power in Gd-Sr manganites0 aColossal thermoelectric power in GdSr manganites  a6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCEbEPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETYcJUL  a170080 v913 a<p>Manganites belonging to the series Gd(1-x)Sr(x)MnO(3) (x=0.3, 0.4 and 0.5) were prepared by wet solid-state reaction and their thermoelectric power was evaluated. Thermoelectric power measurements revealed a peak value at similar to 40 K. All the samples exhibited a colossal thermopower at similar to 40K and in that Gd(0.5)Sr(0.5)MnO(3) exhibited a maximum value of similar to 35 V/K, which is the largest reported for these class of materials at this temperature. Temperature-dependent magnetisation measurements showed that the samples exhibit a phase transition from paramagnetic to spin-glass-like state at these temperatures. Plausible mechanisms responsible for the observed colossal thermoelectric power in Gd-Sr manganites are discussed. Copyright (C) EPLA, 2010</p>1 aSagar, S.1 aGanesan, V.1 aJoy, Pattayil, Alias1 aThomas, Senoy1 aLiebig, A.1 aAlbrecht, M.1 aAnantharaman, Maliemadom, R.  uhttps://library.ncl.res.in/content/colossal-thermoelectric-power-gd-sr-manganites-001742nas a2200241   4500008004100000022001400041245013100055210006900186260012500255300001100380490000800391520077200399100002101171700001501192700001901207700002101226700002201247700001801269700002501287700002501312700003301337856013001370       2013                        eng d  a0003-695100aContact potential induced enhancement of magnetization in polyaniline coated nanomagnetic iron oxides by plasma polymerization0 aContact potential induced enhancement of magnetization in polyan  aCIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USAbAMER INST PHYSICScOCT  a1624140 v1033 a<p>The present work derives motivation from the so called surface/interfacial magnetism in core shell structures and commercial samples of Fe3O4 and gamma Fe2O3 with sizes ranging from 20 to 30 nm were coated with polyaniline using plasma polymerization and studied. The High Resolution Transmission Electron Microscopy images indicate a core shell structure after polyaniline coating and exhibited an increase in saturation magnetization by 2 emu/g. For confirmation, plasma polymerization was performed on maghemite nanoparticles which also exhibited an increase in saturation magnetization. This enhanced magnetization is rather surprising and the reason is found to be an interfacial phenomenon resulting from a contact potential. (C) 2013 AIP Publishing LLC.</p>1 aSethulakshmi, N.1 aSooraj, V.1 aSajeev, U., S.1 aNair, Swapna, S.1 aNarayanan, T., N.1 aJoy, Lija, K.1 aJoy, Pattayil, Alias1 aAjayan, Pulickel, M.1 aAnantharaman, Maliemadom, R.  uhttps://library.ncl.res.in/content/contact-potential-induced-enhancement-magnetization-polyaniline-coated-nanomagnetic-iron-0