Author: "Garg, V. K." / Topic: magnetization - Searchworks@Jio Institute Digital Library Search Results

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Author: Coaquira, J. A. H., Cardoso, C. A., Soares, F. Q., Garg, V. K., Oliveira, A. C., Rodriguez, A. F. R., Rabelo, D., Morais, P. C., Desimoni, J., editor, Ramos, C.P., editor, Arcondo, Bibiana, editor, Saccone, F. D., editor, and Mercader, R.C., editor
Published: 2009
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Author: Rodriguez, A. F. R., Coaquira, J. A. H., Santos, J. G., Silveira, L. B., Marmolejo, E. M., Trennepohl, W., Rabelo, D., Oliveira, A. C., Garg, V. K., Morais, P. C., Kuzmann, E., editor, and Lázár, K., editor
Published: 2009
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Author: Coaquira, J. A. H., Rodriguez, A. F. R., Santos, J. G., Silveira, L. B., Oliveira, A. C., Garg, V. K., Soares, F. Q., Rabelo, D., Morais, P. C., Pasquevich, A., editor, Rentería, M., editor, Saitovitch, E. Baggio, editor, and Petrilli, H., editor
Published: 2008
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Author: Coaquira, J. A. H., Cardoso, C. A., Soares, F. Q., Garg, V. K., Oliveira, A. C., Rodriguez, A. F. R., Rabelo, D., and Morais, P. C.
Published: 2010
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Author: Coaquira, J. A. H., Rodriguez, A. F. R., Santos, J. G., Silveira, L. B., Oliveira, A. C., Garg, V. K., Soares, F. Q., Rabelo, D., and Morais, P. C.
Published: 2007
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Author: Coaquira, J. A. H., Cardoso, C. A., Soares, F. Q., Garg, V. K., Oliveira, A. C., Rodriguez, A. F. R., Rabelo, D., and Morais, P. C.
Subjects: MOSSBAUER spectroscopy, NANOPARTICLES, POLYMERS, CHEMICAL processes, X-ray diffraction, MAGNETIC properties
Abstract: Mössbauer and magnetic characterization of polymer-dispersed γ-Fe2O3 nanoparticles treated under different chemical processes are reported in this work. X-ray powder diffraction analysis provides a mean particle size of D ~ 8.0 nm. Whereas Mössbauer spectroscopy data suggest the presence of only Fe3 + ions, magnetization measurements indicate the occurrence of a freezing phenomenon in agreement with the thermal evolution of Mössbauer spectra. A core–shell model was used to determine a magnetically disordered layer (shell) of d ~ 1.0 nm covering a region of collinear magnetic moments (core). The chemical treatments with H2O2 and Na2S2O8 modify notoriously the magnetic response of the polymer-dispersed nanoparticles. [ABSTRACT FROM AUTHOR]
Published: 2010
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