Microwave ferromagnetic resonance of cobalt and nickel substituted U-type hexaferrites

Author

Afsar, Mohammed ; Lisjak, Darja ; Bahadoor, Adil ; Wang, Yong

Author_Institution

Dept. of ECE, Tufts Univ., Medford, MA, USA

fYear

2005

fDate

4-8 April 2005

Firstpage

903

Lastpage

904

Abstract

Ba₄Co₂Fe₃₆O₆₀ and Ba₄Ni₂Fe₃₆O₆₀ are prepared using coprecipitation and consequent calcination. Samples are prepared such that they fit exactly into rectangular waveguide shims. The scattering parameters on the samples are determined using vector network analyzer after TRL calibration. The complex permittivity and permeability are then solved analytically from the measured parameters using Weir´s equations. Microwave properties of such Cu and Ni substituted U-type hexaferrites are investigated for the first time.

Keywords

S-parameters; barium compounds; calcination; chemical exchanges; cobalt compounds; ferrites; ferromagnetic resonance; magnetic permeability; network analysis; nickel compounds; permittivity; precipitation (physical chemistry); rectangular waveguides; shims; Ba₄Co₂Fe₃₆O₆₀; Ba₄Ni₂Fe₃₆O₆₀; TRL calibration; Weir equation; calcination; complex permittivity; coprecipitation; ferromagnetic resonance; microwave properties; permeability; rectangular waveguide shim; scattering parameters; substituted U-type hexaferrite; vector network analyzer; Calcination; Calibration; Cobalt; Iron; Magnetic resonance; Nickel; Permeability; Permittivity; Rectangular waveguides; Scattering parameters;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1463880

Filename

1463880