Abstract
We have investigated the effect of microstructure on magnetic properties of Mn-Ir-Pt based spin valves(SV) by varying the deposition conditions of Mn-Ir-Pt films. When Mn-Ir-Pt was sputtered at various input power of 10 ∼ 120 W and at Ar pressure of 2.5 ∼ 10 mtorr, the variation of an exchange coupling filed(Hex) was different depending on a top and bottom SVs. A top SV generally remained at constant the Hex of 350 Oe with input power and gradually increased with Ar pressure, because of the increase of Ir and Pt contents without the change of Hc. In contrast, the bottom SV was strongly determined by the change of microstructure and interface. In both SVs, the high input power generated a large grain size and roughness, which resulted in the decrease of a Hex in a bottom SV. At the high Ar pressure of 10 mtorr, the increase of Ir and Pt and the flat interface resulted in a high Hex in a bottom SV.
| Original language | English |
|---|---|
| Pages (from-to) | 685-690 |
| Number of pages | 6 |
| Journal | Journal of Metastable and Nanocrystalline Materials |
| Volume | 15-16 |
| DOIs | |
| State | Published - 2003 |
| Event | Proceedings of the 9th International Symposium on Metastable Mechanically Alloyed and Nanocrystalline Materials (ISMANAM-2002) - Seoul, Korea, Republic of Duration: 8 Sep 2002 → 12 Sep 2002 |
Keywords
- Exchange Coupling Field
- Giant Magnetoresistance
- Mn-Ir-Pt
- Spin Valve
- Sputtering Conditions
- Texture