Magnetic and microwave properties of basal-plane oriented BaFe₁₁In1O₁₉ ferrite thick films processed by screen printing

C. N. Chinnasamy
T. Sakai
S. Sivasubramanian
Aria F. Yang
C. Vittoria, Northeastern University
V. G. Harris, Northeastern University

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Originally published in Journal of Applied Physics 103, 07F710 (2008). DOI:10.1063/1.2829905 (http://dx.doi.org/10.1063/1.2829905).

Abstract

In-doped BaFe₁₁In1O₁₉ particles were prepared by a modified ceramic reaction using In2O₃, BaCo3, and Fe₂O₃ followed by mechanical dispersion. X-ray diffraction analysis confirmed the formation of pure BaFe₁₁In1O₁₉ phase and scanning electron micrographs showed platelet particles of about 1 μm in diameter. This powder was subsequently screen printed on alumina substrate using a suitable binder and oriented under a dc magnetic field of 15 kOe. The screen printed films were annealed at different durations to produce dense and thick ferrite materials. The hysteresis loops for the as-prepared and annealed screen printed, in-plane oriented films show a hysteresis squareness ratio (M_r/M_s) of 0.93, saturation magnetic moment of 4000 G, and coercivity of 634 Oe. The ferrimagnetic resonance measurements showed a linewidth (Δ H) ∽860 Oe. The g (Lande spectroscopic splitting factor) value deduced from the relation between resonant frequencies versus resonance field for the screen printed films was found to be 1.91.