01313nas a2200157   4500008004100000022001400041245006700055210006700122260007300189300001000262490000800272520073600280100001601016700002501032856009801057       2014                        eng d  a0009-261400aFerromagnetism at room temperature in activated graphene oxide0 aFerromagnetism at room temperature in activated graphene oxide  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUN  a89-920 v6053 a<p>High room temperature ferromagnetic moment with high Curie temperature (&gt;700 K) for graphene oxide (GO) is obtained by a simple chemical activation using phosphoric acid followed by heat treatment at 800 degrees C. The field and temperature variations of the magnetization data indicate ferromagnetic, paramagnetic and diamagnetic contributions in the acid/heat treated sample. IR spectroscopic studies suggest hydrogenation (reduction) of GO after the acid and heat treatments. The results point to the role of defects, extent of hydrogenation, changes in the bonding characteristics and the nature of the functional groups in determining the different magnetic contributions. (C) 2014 Elsevier B.V. All rights reserved.</p>1 aRaj, Govind1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/ferromagnetism-room-temperature-activated-graphene-oxide-001420nas a2200205   4500008004100000022001400041245008100055210006900136260010600205300001000311490000800321520065800329653002100987653002201008653001901030653002401049100001601073700002501089856010001114       2014                        eng d  a0038-109800aMagnetism in disordered carbon as a function of the extent of graphitization0 aMagnetism in disordered carbon as a function of the extent of gr  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcJAN  a89-940 v1773 a<p>Magnetic properties of disordered carbon have been investigated as a function of the extent of graphitization. It is found that the magnetization of the disordered carbon decreases with increasing degree of graphitization. Treatment with acid modifies the magnetic characteristics considerably and the original magnetic characteristics are retained upon further heat treatment. The results show that the intrinsic magnetic behavior of the disordered carbon depends on the microstructure and that the edge states play a critical role in deciding the magnetic interactions in the amorphous carbon system. (C) 2013 Elsevier Ltd. All rights reserved.</p>10aAmorphous carbon10adisordered carbon10aGraphitization10amagnetic properties1 aRaj, Govind1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/magnetism-disordered-carbon-function-extent-graphitization-0