Magnetic properties of oblique deposited (FeCoNiNbB)x(SiO2)1-x granular films in a wide x range
Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University Lanzhou 730000, PRC
Corresponding author: firstname.lastname@example.org
Accepted: 23 December 2009
(Fe57Co24Ni4Nb2B13)x-(SiO2)1-x nano-granular thin films in a wide x range were fabricated by magnetron sputtering by oblique incidence. Excellent soft magnetic properties have been achieved with variable in-plane uniaxial magnetic anisotropy field Hk. For same oblique angle θ, with decreasing x, Hk increases first and reaches maximum at x = 0.88, then decreases; while the coercivity in the easy axis changes slightly and is less than 10 Oe and the resitivity ρ increases monotonously and exhibits a higher rate in x < 0.88. For films with θ = 15°, the sample x = 0.88 possesses a high FMR frequency fr of 5.4 GHz and a large permeability of 40 up to 4.1 GHz. The sample x = 0.66 has both high resistivity and excellent soft magnetic properties, of which the coercivities in hard and easy axes are 3.1 and 2.4 Oe, respectively, Hk is 60 Oe, and ρ reaches 3.1 103 μΩ cm. The magnetic spectrum μ = - shows that is more than 150 below 0.70 GHz and fr reaches 1.70 GHz.
PACS: 61.46.Df – Structure of nanocrystals and nanoparticles (“colloidal” quantum dots but not gate-isolated embedded quantum dots) / 75.40.Gb – Dynamic properties (dynamic susceptibility, spin wave, spin diffusion, dynamic scaling, etc.)
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