标题： 硝酸锂中的巨大介电响应和电极化 显示英文标题

标题： Colossal Dielectric Response and Electric Polarization in Lithium Nitrate

摘要： 具有创纪录特性的材料很有趣，因为它们可以重新定义现有的模型。 硝酸锂 LiNO$_3$被确认在粉末样品中，在临界温度$T$$_W$ = 306 K 以上时，介电常数$\epsilon$' 大于 6x10$^6$在 1 kHz。当从$T$$_W$ 冷却回来时，如果温度保持在 275 K 以上，$\epsilon$' 可以保持在 10$^4$以上，耗散因子低于 10$^2$。 此外，热释电电流测量表明LiNO$_3$是铁电体，其电极化强度为$P$ = 1,200 $\mu$C/cm$^2$。 两者$\epsilon$' 和$P$都是所有已知材料中最高的。 我们建议$\epsilon$' 和$P$的巨大量值的机制源于宏观层面上平面 NO$_3$$^-$ 的齿轮啮合与脱开过程。 我们的结果可能推动陶瓷电容器的边界。 显示英文摘要

摘要： Materials with record-breaking properties are interesting as they can redefine existing models. Lithium nitrate LiNO$_3$ is identified to possess a dielectric constant $\epsilon$' larger than 6x10$^6$ at 1 kHz in powdered samples above the critical temperature $T$$_W$ = 306 K. When cooling back from $T$$_W$, if the temperature remains above 275 K, $\epsilon$' can be sustained above 10$^4$ and the dissipation factor below 10$^2$. Moreover, pyroelectric current measurements show LiNO$_3$ to be ferroelectric with an electric polarization of $P$ = 1,200 $\mu$C/cm$^2$. Both $\epsilon$' and $P$ are the highest amongst all known materials. We suggest the mechanism underlying the colossal magnitudes of $\epsilon$' and $P$ to stem from a gearing-ungearing process of the planar NO$_3$$^-$ at the macroscopic level. Our results potentially push the boundaries of ceramic capacitors.