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Magnetoelectric hysteresis loops in Cr_2O_3 at room temperature

机译:室温下Cr_2O_3中的磁电磁滞回线

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摘要

We revisit the room-temperature linear magnetoelectric effect in Cr_2O_3 single crystals.It was found that the temperature dependence of dielectric constants in a magnetic field H shows a λ-shaped peak at the Neel temperature (≈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 Cr_2O_3 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.
机译:我们重新研究了Cr_2O_3单晶的室温线性磁电效应,发现磁场H的介电常数对温度的依赖性在Neel温度(≈307K)处呈现一个λ形的峰,且由施加电场使施加H的磁滞反向。施加E引起的磁化的H依赖性也观察到类似的反转和磁滞行为。这些结果表明Cr_2O_3在有限的H()中表现为典型的铁电体(铁磁体) E)即使在室温下。我们讨论了在最新的多铁磁研究背景下在线性磁电系统中观察到的铁磁行为。

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