02344nas a2200289   4500008004100000022001400041245011300055210006900168260007300237300001200310490000800322520134400330653002101674653002201695653001601717653002401733653001801757100002001775700001701795700001401812700001601826700002101842700002501863700001901888700001801907856012901925       2006                        eng d  a0304-885300aModifications in magnetic anisotropy of M-type strontium hexaferrite crystals by swift heavy ion irradiation0 aModifications in magnetic anisotropy of Mtype strontium hexaferr  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcOCT  a392-4020 v3053 a<p>Using vibrating sample magnetometery (VSM) 50 MeV Li(3+) ion irradiation effects on magnetic properties of single crystals of SrGa(x)In(y)Fe(12-(x+y))O(19) (where x = 0, 5, 7, 9; y = 0, 0.8, 1.3, 1.0), are reported. The substitution of Ga and In in strontium hexaferrite crystals decreases the value of magnetization sharply, which is attributed to shifting of collinear magnetic order to a non-collinear one. Reduction of magnetization is also explained to be as a result of the occupation of the crystallographic sites of Fe(3+) by Ga(3+) and In(3+). The Li(3+) ion irradiation decreases the value of magnetization, irrespective of whether the crystals are Ga-In substituted or unsubstituted crystals of SrFe(12)O(19). The result is interpreted in terms of the occurrence of a paramagnetic doublet in crystals replacing magnetic sextuplet as a result of irradiation. Substitution of Ga-In in Strontium hexaferrite decreases the value of anisotropy constant. Irradiation with Li(3+) ions increases the values of anisotropy field for both substituted as well as unsubstituted crystals. Substitution with Ga-In also decreases the Curie temperature (T(c)) but the irradiation with Li(3+) ions does not affect the curie temperature of either Ga-In substituted or pure SrFe(12)O(19) crystals. (C) 2006 Elsevier B.V. All rights reserved.</p>10aanisotropy field10aCurie temperature10airradiation10aMagnetic anisotropy10aMagnetization1 aKaur, Balwinder1 aBhat, Monita1 aLicci, F.1 aKumar, Ravi1 aKulkarni, S., D.1 aJoy, Pattayil, Alias1 aBamzai, K., K.1 aKotru, P., N.  uhttps://library.ncl.res.in/content/modifications-magnetic-anisotropy-m-type-strontium-hexaferrite-crystals-swift-heavy-ion-001416nas a2200205   4500008004100000022001400041245008100055210006900136260009500205300001400300490000600314520065400320653002200974653002000996653002301016653001701039100001801056700002501074856011101099       2008                        eng d  a1533-488000aSuperparamagnetic nanocrystalline ZnFe2O4 with a very high curie temperature0 aSuperparamagnetic nanocrystalline ZnFe2O4 with a very high curie  a25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USAbAMER SCIENTIFIC PUBLISHERScAUG  a3955-39580 v83 a<p>Studies on the magnetic properties of nanocrystalline ZnFe2O4 synthesized by an autocombustion method are reported. Superparamagnetic behavior is observed for the nanocrystalline materials with particle sizes of 8 nm and 17 nm, with superparamagnetic blocking temperatures of 65 K and 75 K, respectively. Magnetic hysteresis with very large coercivities of 533 Oe and 325 Oe, respectively, are observed at 12 K. Studies on the temperature variation of the magnetization above room temperature indicate that the Curie temperature is as high as similar to 800 K when compared to the paramagnetic nature of bulk zinc ferrite at room temperature.</p>10aCurie temperature10aNanocrystalline10aSuperparamagnetism10aZinc Ferrite1 aDeka, Sasanka1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/superparamagnetic-nanocrystalline-znfe2o4-very-high-curie-temperature-0