Abstract
We investigated the size dependent magnetic properties of Ni nanoparticles. We prepared four samples with average particle diameters of 7.0, 14.0, 16.5, and 20.0 nm. The blocking temperatures (TBs) were 40.0, 150.0, 250.0, and ∼ 300.0 K for the above Ni nanoparticles, respectively. Saturation magnetization increased with increasing particle diameter due to the reduced magnetic moments of surface atoms. The coercivities at 5 K ranged from 270 and 340 Oe, whereas those at 300 K were zero due to superparamagnetism.
| Original language | English |
|---|---|
| Pages (from-to) | 4390-4394 |
| Number of pages | 5 |
| Journal | International Journal of Modern Physics B |
| Volume | 20 |
| Issue number | 25-27 |
| DOIs | |
| State | Published - 30 Oct 2006 |
Keywords
- Ni nanoparticles
- Size dependent magnetic properties
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