Evaluation of the magnetic susceptibility using an analytical scale

Química Nova

Universidade de São Paulo, Ribeirão Preto¹  Baffa, Oswaldo¹  Carneiro, Antonio Adilton O.¹  Touso, Alessandro Tadeu¹ 

关键词: analytical scale;    magnetic susceptibility;    magnetic dipole.;   

DOI  :  10.1590/S0100-40422003000600030

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

A simple system to measure the magnetic susceptibility of different materials is presented. The system uses an analytical scale with sensitivity on the order of micrograms and a permanent NdBFe magnet, based in the Rankine method. In this apparatus, the sample is placed near to the magnet that is fixed on the scale. Depending on the magnetic properties of the sample, an attractive or repulsive force will appear between the magnet and the magnetizing sample. Measuring this force, registered by the scale as a mass, the magnetic parameters such as: permeability and susceptibility of the sample can be determined. Despite it is simplicity the method is quantitative, precise and easily reproducible in many laboratories, what makes it attractive for teaching experiments.

【 授权许可】

Unknown