01418nas a2200193   4500008004100000022001400041245010400055210006900159260000900228300001200237490000800249520074400257653001301001653002401014653002301038100002701061700001601088856012001104       2019                        eng d  a0167-577X00aLarge enhancement in the magnetostriction parameters of the composite of CoFe2O4 and CoFe1.9Ga0.1O40 aLarge enhancement in the magnetostriction parameters of the comp  cFEB   a303-3060 v2363 a<p>A new strategy to enhance the magnetostriction parameters of cobalt ferrite (CoFe2O4) is illustrated. A composite comprising of nanocrystalline CoFe2O4 and bulk CoFe(1.9)Ga(0.1)O(4 )powders were mixed together then compacted and sintered at 1450 degrees C for 10 min. For a composite of 70 wt% CoFe2O4 and 30 wt% of CoFe(1.9)Ga(0.1)O4, maximum magnetostriction coefficient (lambda(max)) of -350 ppm has been obtained at lower magnetic field which is nearly 20% and 65% higher than that obtained for CoFe2O4 and CoFe1.9Ga0.1O4, respectively. Moreover, the composite exhibited higher strain sensitivity [d lambda/dH](max )of -2.6 x 10 (9) A(-1) m against the individual components of the composite. (C) 2018 Published by Elsevier B.V.</p>10aCeramics10aComposite materials10aMagnetic materials1 aAnantharamaiah, P., N.1 aJoy, P., A.  uhttps://library.ncl.res.in/content/large-enhancement-magnetostriction-parameters-composite-cofe2o4-and-cofe19ga01o401619nas a2200229   4500008004100000022001400041245010500055210006900160260000800229300001600237490000700253520083900260653001301099653002301112653002001135653002001155653002201175100002201197700002701219700001601246856012701262       2019                        eng d  a0272-884200aMagnetic parameters of SrFe12O19 sintered from a mixture of nanocrystalline and micron-sized powders0 aMagnetic parameters of SrFe12O19 sintered from a mixture of nano  cJUL  a13592-135960 v453 a<p>Obtaining higher magnetic parameters is essential for high-power sintered strontium ferrite (SrFe12O19) for various applications. A novel approach has been made to improve the magnetic parameters of sintered strontium ferrite by making self-composites from nano and micron-sized powders. Powders with two different weight ratios (50 wt% nano:50 wt% micron and 75 wt% nano:25 wt% micron) were mixed together, compacted and sintered at 1200 degrees C for 1 h. For a self-composite of 75 wt% nano and 25 wt% micron-sized powders, coercivity (H-c) of 3076 Oe has been obtained, larger than the values for the sintered compacts from the component powders. The present study suggests that the magnetic parameters of sintered SrFe12O19 can be improved by making self-composite comprising of nanocrystalline and micron-sized powders.</p>
10aCeramics10aMagnetic materials10amicrostructures10aSelf-composites10astrontium ferrite1 aShashanka, H., M.1 aAnantharamaiah, P., N.1 aJoy, P., A.  uhttps://library.ncl.res.in/content/magnetic-parameters-srfe12o19-sintered-mixture-nanocrystalline-and-micron-sized-powders