Abstract
We have studied the influence of P and of plating current density on static/dynamic magnetic and electrical properties of CoNiFe high moment alloy. We found that morphology, electrical and magnetic properties of films with P content up to 10 at. % are quite different from those of pure CoNiFe. CoNiFeP morphology consists of a structure made of isolated islands with sizes varying between 10 and 50 μm. We indirectly obtained resistivity in this structure by using high-frequency magnetic measurements. Film composition is weakly dependent on plating current density for values larger than 10 mA cm -2. Coercivities increase up to 6400 A m -1 and magnetization saturation is reduced to 1.0 T in CoNiFeP films. The most remarkable effect of P addition to CoNiFe is the increase of resistivity over two order of magnitude with values of 5.2 X 10 -5 Ω m compared to 2.4 X 10 -7 Ω m of pure CoNiFe. We also found that the ferromagnetic resonance of CoNiFeP alloy is 3 GHz for sample with 10 at. % P and a performance factor (BF) of ∼4 X 10 5 T s -1, which is a better performance than bulk ferrite.
| Original language | English |
|---|---|
| Pages (from-to) | 3917-3920 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Magnetics |
| Volume | 44 |
| Issue number | 11 PART 2 |
| DOIs | |
| Publication status | Published - Nov 2008 |
| Externally published | Yes |
Keywords
- CoNiFeP
- High resistivity
- Magnetic recording
- Power electronics