VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Field-induced relaxation of bulk composition due to internal boundaries
    Jamnik, Janko ; Guo, Xin ; Maier, Joachim
    The establishment of compositional variations in solids caused by an external electric field usually requires electrodes that block either electronic or ionic charge carriers. Here we present ... unambiguous experimental and theoretical evidence that the compositional variations can occur even in the case of completely nonblocking electrodes if grain boundaries are present. In addition to the proper grain boundary impedance arc characterized by the dielectric relaxation time, , a second arc occurs at much lower frequencies (). It is shown that this low-frequency response refers to a chemical relaxation (Warburg diffusion) induced by the selectively blocking grain boundary. The effect is the analogue to the chemical relaxation induced by selectively blocking electrodes (cf. Wagner-Hebb polarization).
    Vir: Applied physics letters. - ISSN 0003-6951 (Vol. 82, no. 17, 2003, str. 2820-2822)
    Vrsta gradiva - članek, sestavni del
    Leto - 2003
    Jezik - angleški
    COBISS.SI-ID - 2859802

vir: Applied physics letters. - ISSN 0003-6951 (Vol. 82, no. 17, 2003, str. 2820-2822)
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