Magnetoelectric hysteresis loops in Cr2O3 at room temperature
Magnetoelectric hysteresis loops in Cr2O3 at room temperature
复制标题
DOI：
10.1103/physrevb.87.180408
复制
发表时间：
2013-05-28
影响因子：
3.7
通讯作者：
Kimura, Tsuyoshi
中科院分区：
文献类型：
--
作者：
Iyama, Ayato;Kimura, Tsuyoshi
我们重新审视 Cr2O3 单晶中的室温线性磁电效应。结果发现，磁场 H 中介电常数的温度依赖性在尼尔温度（约 307 K）处显示出 lambda 形峰值，并且通过施加 H 引起的电极化通过扫描电场 E 会以磁滞反转。在施加 E 引起的磁化强度的 H 依赖性中也观察到类似的反转和磁滞行为。这些结果表明 Cr2O3 表现为典型的磁化强度。 即使在室温下，铁电体（铁磁体）的 H (E) 也有限。我们在近期多铁性研究的背景下讨论了在线性磁电系统中观察到的铁性行为。
We revisit the room-temperature linear magnetoelectric effect in Cr2O3 single crystals. It was found that the temperature dependence of dielectric constants in a magnetic field H shows a lambda-shaped peak at the Neel temperature (approximate to 307 K) and that electric polarization induced by applying H is reversed with a hysteresis by sweeping an electric field E. Similar reversal and hysteretic behaviors were also observed in the H dependence of magnetization induced by applying E. These results imply that Cr2O3 behaves as a typical ferroelectric (ferromagnet) in finite H (E) even at room temperature. We discuss the ferroic behaviors observed in the linear magnetoelectric system in the context of recent studies on multiferroics.