Rakshit, R. K. ; Bose, S. K. ; Sharma, R. ; Budhani, R. C. (2006) Giant coercivity nanodots and fractals in CoPt films grown on (001) SrTiO3 using pulsed laser deposition Applied Physics Letters, 89 (20). 202511 _1-202511 _3. ISSN 0003-6951
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Official URL: http://apl.aip.org/resource/1/applab/v89/i20/p2025...
Related URL: http://dx.doi.org/10.1063/1.2388859
Abstract
High coercivity nanoscale structures of CoPt are grown on (001) SiTiO3 with pulsed laser ablation. At low growth rate ( ∃ 0.4 Å /s), the film morphology changes from a self-similar fractal to nanodots as the deposition temperature is raised from 700 to 800° C. While the nanodots are L10 ordered phase with out-of-plane c axis and coercivity Hc⊥=30 kOe, the fractals have a nonzero, in-plane c-axis component of the L10 phase. The large lattice mismatch between (001) SrTiO3 and the ac/bc plane of L10 imparts tensile strain to the films whose morphological manifestations can be suppressed at high growth rates.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| Keywords: | Cobalt Alloys; Platinum Alloys; Metallic Thin Films; Coercive Force; Magnetic Thin Films; Pulsed Laser Deposition; Nanostructured Materials; Fractals; Internal Stresses; Ferromagnetic Materials |
| ID Code: | 77231 |
| Deposited On: | 10 Jan 2012 14:34 |
| Last Modified: | 10 Jan 2012 14:34 |
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