title: A simple and sensitive apparatus for measuring the magnetization of small ferrite samples.
abstract: This paper describes an apparatus which allows the routine measurement of the magnetization of small ferrite samples using the well-known extraction method. In contrast to the classical extraction method, however, this device makes use of a high-permeability magnetic circuit that serves both to apply the bias field and to collect the sample flux. This design, together with a signal sampling technique, allows an unusually high sensitivity for this type of method (magnetic moment resolution is 5 x 10(-5) microem). The apparatus is described in detail and a brief theory of its function is given. Finally, the device usefulness is illustrated by some measurement results referring to Ga YIG spheres that are used in ferrimagnetic resonators.
authors.affiliation: Commissariat a L'Energic Atomique, Centre d'Etudes Nucleaires de Grenoble, Laboratoire d'Electronique et de Technologie de L'Information, B.P. 85 Centre de Tri, 38041 Grenoble Cedex, France.
authors.forename: J C
authors.initials: JC
authors.lastname: Peuzin
authors.forename: S
authors.initials: S
authors.lastname: Girod
authors.forename: J C
authors.initials: JC
authors.lastname: Rebreyend