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给出了一种测量铁电单晶高电阻的方法,可以将热释电及其他干扰分开,在低温至高温范围将晶片的体电阻和面电阻方便地测量出来。在O～160℃对多畴 LN 的 c 切片的测量结果表明,在室温附近体电阻率出现明显的转折;这是作为载流子的极化子由跳跃导电到能带导电的转变的有力证据。在温度不太高时,LN 的体电阻随温度的变化还存在弛豫效应。
A method of measuring the high resistance of a ferroelectric single crystal is given, in which the pyroelectric and other disturbances can be separated and the bulk and surface resistances of the wafer can be conveniently measured in the low to high temperature range. Measurements of c-slices of multidomain LN at O ~ 160 ° C show that there is a clear transition of the bulk resistivity at room temperature; this is a strong evidence that the carrier as a polaron transitions from jump-to-band conduction . When the temperature is not too high, the body resistance of LN changes with the temperature there is relaxation effect.