期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 300, 期 1, 页码 E354-E358出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2005.10.119
关键词
Magnetic nanoparticles in polymer; Superparamagnetism; Magnetic anisotropy; Mossbauer spectroscopy; Atomic force microscopy
To study the nature of anisotropy effects in samples of polymer (PVA) films containing nanoparticles of magnetite the depth selective conversion Mossbauer spectroscopy (for layer-by-layer phase and magnetic analysis), saturation isothermal remanent magnetization (SIRM) and natural remanent magnetization measurements (NRM) in three mutual-orthogonal directions and atomic force microscopy were used. These investigations revealed formation of in plane direction of linear Fe3O4 nanoparticles chains and their number increase with nanoparticles concentration growth in the samples. Significant influence of polymer matrix on macroscopic magnetic properties was revealed from the temperature dependences of saturation magnetization and Mossbauer spectra. (C) 2005 Elsevier B. V. All rights reserved.
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