Magneto-optical studies of Sm(Fe,Ti)[sub 12] perpendicular textured sputtered films
Journal Article
·
· Journal of Applied Physics; (United States)
- Physics Dept., Queens College of CUNY, Flushing, New York 11367 (United States)
- IBM Research Center, Yorktown Heights, New York 10598 (United States)
Measurements of the polar Kerr rotation and optical coercivity as a function of photon energy have been made on [approx]2 [mu]m thick ThMn[sub 12]-type crystalline sputtered films of Sm(Fe,Ti)[sub 12]. The optical coercivity for a Ti containing (222) textured film was 3.10 kOe at a photon energy of 1.25 eV, 2.96 kOe at 1.84 eV, and 2.92 kOe at 2.45 eV. The optical coercivity for a similar composition (002) textured Sm(Fe,Ti)[sub 12] film was relatively constant at 1.24 kOe. These samples were measured in air at 300 K without any protective overcoating. The polar Kerr rotation observed for these crystalline films versus the photon energy paralleled that observed for pure Fe. The magnetometer and optical coercivities for the (222) textured Sm(Fe,Ti)[sub 12] films were 1.5 and 2.5 times as large, respectively, as for similar composition (002) textured films. Differences in grain sizes incorporated during the direct synthesis of the films onto heated substrates are needed to account for the large differences observed in the coercivities for the (222) versus (002) textured films.
- DOE Contract Number:
- FG02-86ER45265
- OSTI ID:
- 6633100
- Journal Information:
- Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 73:10; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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