Energy barrier analysis of Nd-Fe-B thin films

R. Goto, S. Okamoto, N. Kikuchi, O. Kitakami

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


The magnetization reversal mechanism of a permanent magnet has long been a controversial issue, which is closely related to the so-called coercivity problem. It is well known that the energy barrier for magnetization reversal contains essential information on reversal process. In this study, we propose a method to analyze the energy barrier function for the magnetization reversal. Preferentially (001) oriented Nd-Fe-B films with and without a Nd overlayer are used as model magnets. By combining the magnetic viscosity and time dependent coercivity measurements, the barrier function has been successfully evaluated. As a result, although the Nd-Fe-B films with and without Nd overlayer exhibit different magnetic behaviors, the power indices for their energy barrier are almost the same, suggesting that the magnetization reversal proceeds in a similar mode.

Original languageEnglish
Article number17B514
JournalJournal of Applied Physics
Issue number17
Publication statusPublished - 2015 May 7


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