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Deprecated: Implicit conversion from float 251.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Sci+Rep 2015 ; 5 (ä): ä Nephropedia Template TP
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Magnetic multi-granule nanoclusters: A model system that exhibits universal size effect of magnetic coercivity #MMPMID26183842
Sung Lee J; Myung Cha J; Young Yoon H; Lee JK; Keun Kim Y
Sci Rep 2015[]; 5 (ä): ä PMID26183842show ga
It is well known that the coercivity of magnetic nanomaterials increases up to a maximum and then decreases to zero with decreasing particle size. However, until now, no single synthesis method has been able to produce magnetic nanoparticles with a wide range of sizes, i.e., from 10 to 500?nm, in order to uncover the coercivity evolution. Here we report the characterization of magnetite (Fe3O4) multi-granule nanoclusters (MGNCs) to demonstrate the transitional behaviour of coercivity. The M?H curves indicate that our samples had a relatively high saturation magnetization (MS) value of ~70?emu/g and that the coercivity (Hc) increased to the maximum value of ~48 Oe until the nanoclusters reached a size of ~120?nm; the coercivity then gradually decreased to zero.