Abstract

For large‐grained manganese zinc (MnZn) ferrite ceramics, grain misorientation determined by electron backscatter diffractions and grain‐boundary resistance measured using microcontact impedance spectroscopy have been correlated. The degree of oxidation of grain boundaries and, hence, the barrier height depends on the overall grain‐boundary network as well as on the individual boundary structure; therefore, a statistical analysis has been performed based on several hundreds of local measurements. When the boundaries are divided into low‐ and high‐resistance groups, statistically significant differences in rotation axis and angle distributions are found. The misorientation distribution of the low‐resistance boundary group is suggested to reflect the low‐energy configurations of boundary planes in MnZn ferrites.

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