Temperature dependence of the magnetoelectric effect in Pb(Zr0.2Ti0.8)O3/La0.8Sr0.2MnO3 multiferroic heterostructures
Temperature dependence of the magnetoelectric effect in Pb(Zr0.2Ti0.8)O3/La0.8Sr0.2MnO3 multiferroic heterostructures
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DOI：
10.1063/1.3472259
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发表时间：
2010-07
影响因子：
4
通讯作者：
C. Vaz;Y. Segal;J. Hoffman;R. Grober;F. Walker;C. Ahn
中科院分区：
文献类型：
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作者：
C. Vaz;Y. Segal;J. Hoffman;R. Grober;F. Walker;C. Ahn
Pb(Zr0.2Ti0.8)O3/La0.8Sr0.2MnO3 （PZT/LSMO）人工多铁异质结构的磁电响应随温度、电场和磁场的变化表明，在LSMO的磁性临界点附近，即~ 180 K（−13.5 Oe cm kV−1）温度下，磁电耦合达到最大。磁电耦合表现出强烈的温度依赖性，在150 K时改变符号，在~ 100 K （+6 Oe cm kV−1）以下饱和为正值。磁电曲线响应于铁电开关，在两种状态之间迟滞切换。磁电响应的峰值与LSMO在临界区域附近的磁性开/关开关的观察相吻合，该区域对电场的灵敏度最大，使其成为器件应用的有前途的方法。
The magnetoelectric response of Pb(Zr0.2Ti0.8)O3/La0.8Sr0.2MnO3 (PZT/LSMO) artificial multiferroic heterostructures as a function of temperature, electric, and magnetic field, shows that the largest magnetoelectric coupling is attained at temperatures near the magnetic critical point of LSMO, at ∼180 K (−13.5 Oe cm kV−1). The magnetoelectric coupling displays a strong temperature dependence, changing sign at 150 K and saturating to positive values below ∼100 K (+6 Oe cm kV−1). The magnetoelectric curve switches hysteretically between two states in response to the ferroelectric switching. The peak in the magnetoelectric response coincides with the observation of on/off switching of magnetism in LSMO near the critical region, where the sensitivity to electric field is largest, making it a promising approach for device applications.