Retention & Retention Loss in Ferroelectrics - Practical Electron Microscopy and Database - - An Online Book - |
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Microanalysis | EM Book https://www.globalsino.com/EM/ | ||||||||
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Retention is described by the ability of an FeRAM to retain the sign and magnitude of the remanent-polarization established by writing. Lack of retention in ferroelectrics is normally due to electret-like effects, and thus retention is lower at higher temperatures. On the other hand, the reliability of ferroelectric storage at zero bias is described by retention losses, where the polarization slightly decrease with time due to ferroelectric relaxation (see Figure 1793). In practice, for ferroelectric applications, e.g. commercial FeRAM, the retention time must be longer than 10 years.
A couple of mechanisms were proposed to interpret retention losses in ferroelectrics:
[1] A. Gruvermann, M. Tanaka: J. Appl. Phys. 89, 1836 (2001).
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