Study of the insulating layer and interfaces of MgO-based magnetic tunnel junctions by impedance and capacitance spectra

J. C.A. Huang, C. Y. Hsu, W. H. Chen, Y. H. Lee

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5 引文 斯高帕斯(Scopus)

摘要

We have systematically investigated the complex impedance (CI) and complex capacitance (CC) spectra of MgO-based magnetic tunnel junctions (MTJs) due to successive annealing. The variation of the tunnel magnetoresistance (TMR) ratio due to annealing can be related to the change of interfacial trap states and textured MgO based on the analysis of CI spectra by an equivalent circuit model. The results of CC spectra are also consistent with the analysis of CI and observed TMR ratio variation. The CI and CC techniques are also powerful to characterize the oxide-based MTJs.

原文English
頁(從 - 到)911-913
頁數3
期刊IEEE Transactions on Magnetics
43
發行號2
DOIs
出版狀態Published - 2007 二月

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 電氣與電子工程

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