title: Spherical sample holders to improve the susceptibility measurement of superparamagnetic materials.
abstract: The design of two custom sample holders with a spherical cavity for commercial vibrating sample magnetometer systems is described. For such cavities, the magnetization M[over ->] and the internal magnetic field H(i)[over ->] of a sample are both homogeneous. Consequently, the material parameter M(H(i)) of a sample can be determined even for liquids and powders with a high magnetic susceptibility.
authors.affiliation: Experimentalphysik V, Universität Bayreuth, D-95440 Bayreuth, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Friedrich
authors.forename: Tobias
authors.initials: T
authors.lastname: Lang
authors.forename: Ingo
authors.initials: I
authors.lastname: Rehberg
authors.forename: Reinhard
authors.initials: R
authors.lastname: Richter