NiZnCu ferrite applied for LTCC microinductor

• Published in: Journal of magnetism and magnetic materials 2010-10, Vol.322 (19), p.2897-2901
• Main Authors: Guzdek, P., Kulawik, J., Zaraska, K., Bieńkowski, A.
• Format: Article
• Language: English
• Subjects: Applied sciences; Computer simulation; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectric and magnetic properties; Electrical engineering. Electrical power engineering; Electromagnets; Exact sciences and technology; Ferrite; Finite element method; Inductors; LTCC method; Magnetic fields; Magnetic properties and materials; Magnetic properties of monolayers and thin films; Magnetic properties of surface, thin films and multilayers; Magnetization; Mathematical models; Microinductor; Physics; Soft ferrite; Tape casting; Thin films; Thin magnetic layer; Various equipment and components
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2010.05.001

This paper describes the fabrication of thin magnetic layers for an LTCC planar-type inductor with a 0.11 mm thickness. The thin ferrite layers were fabricated by tape casting method. Synthesis conditions and X-ray analysis (300 K) of the Ni 0.3Zn 0.62Cu 0.08Fe 2O 4 ferrite are presented. A pure cubic, Fd 3 m crystal structure was observed for the Ni 0.3Zn 0.62Cu 0.08Fe 2O 4 ferrite. The complex impedance and dielectric permittivity of Ni 0.3Zn 0.62Cu 0.08Fe 2O 4 ferrite were determined as a function of temperature (from −55 to 170 °C) and frequency (from 10 Hz to 2 MHz). Dc resistivity was measured in a temperature range from −55 to 170 °C. Magnetization and magnetic hysteresis were measured by a vibrating sample magnetometer (VSM) in an applied magnetic field up to 60 kOe. The inductance and quality factor were measured in a frequency range 0.1–120 MHz. With the help of finite elements method (FEM) simulation it is possible to calculate the elements electrical parameters and optimize the design. This paper presents a magnetic field modelling of an inductor structure.