Some Properties of Cobalt Ion Doped Nickel Ferrites

• Main Author: 程亞桐
• Other Authors: 許樹恩
• Format: Others
• Language: en_US
• Online Access: http://ndltd.ncl.edu.tw/handle/42333638040853227440

碩士 === 淡江大學 === 物理學系 === 62 === Nickel ferrite has been found to be one of the most versatile of ferrite system for general use. It has relativily high resistivity and low loss for high frequency application. Variation of the d-c resistance, satutation magnetization, permeability etc. with the amount of cobalt ions is measured for samples Ni1-xCoxPe2O4 (X=0-0.05 mole%). For certain compositions large resistivities are found due to the buffering action of the cobalt ions. Magnetization measurements are found to be in good agreement with the hypothesis. The initial permeability rises to a peak near X=0.03. This is apparently caused by domain rotation. In this experiment, each specimen was prepared in the same procedure, and firing in the same condition, so that the influence of preparation procedure was no longer discussed in detial.