Barium ferrite (BaFe12O19) thin films have been deposited by pulsed laser deposition at 900°C in 250 mTorr oxygen on Si substrates with Pt(111) underlayers. The barium ferrite films contained platelet grains and a small amount of acicular grains, with sizes of 300 nm and 80 × 300 nm, respectively, and had a surface roughness of 11 nm. Vibrating-sample magnetometer measurements indicated that the BaFe12O19 films have some perpendicular orientation, with a perpendicular squareness of 0.64 and an in-plane squareness of 0.28. The saturation magnetization is about 190 emu/cc. The perpendicular and in-plane coercivities are 2.1 kOe and 1.6 kOe, respectively.
|Original language||English (US)|
|Number of pages||3|
|Journal||Applied Physics A: Materials Science and Processing|
|State||Published - Feb 1 2004|