Magnetic anisotropy of permalloy films grown on an Mo(001) stepped surface
The Mo(001) stepped surface was self-assembled on Al{sub 2}O{sub 3}(1-102) substrate by molecular beam epitaxy. Ni{sub 80}Fe{sub 20} films were subsequently deposited on the fresh Mo(001) stepped surface at growth temperature (T{sub g}) between 30 and 400{degree}C. Interestingly, in the low T{sub g} regime ({lt}100{degree}C) the Ni{sub 80}Fe{sub 20} films were grown as (001) single crystal while high T{sub g} ({gt}300{degree}C) results in the growth of Ni{sub 80}Fe{sub 20} (110) quadcrystal. For low T{sub g} samples, the easy axis of the Ni{sub 80}Fe{sub 20} film is directed parallel to the underlying Mo step edge direction and the M-H loop along the hard axis reveals a two-step magnetic moment rotation process. In contrast, the high T{sub g} samples display isotropic-like magnetic behavior with a much enhanced coercivity due likely to the surface roughness effect. We conclude that the growth temperature of Ni{sub 80}Fe{sub 20} film on the Mo stepped surface plays an important role on the crystal structure and magnetic anisotropy of Ni{sub 80}Fe{sub 20} film. {copyright} 2001 American Institute of Physics.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40204063
- Journal Information:
- Journal of Applied Physics, Vol. 89, Issue 11; Other Information: DOI: 10.1063/1.1354588; Othernumber: JAPIAU000089000011007380000001; 161111MMM; PBD: 1 Jun 2001; ISSN 0021-8979
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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