Room-temperature large magnetoelectricity in a transition metal doped ferroelectric perovskite
Room-temperature large magnetoelectricity in a transition metal doped ferroelectric perovskite
复制标题
DOI：
10.1103/physrevb.104.174415
复制
发表时间：
2021-11-15
影响因子：
3.7
通讯作者：
Kumar, Ashok
中科院分区：
文献类型：
--
作者：
Kumari, Shalini;Pradhan, Dhiren K.;Kumar, Ashok
通过利用利用磁场控制极化和/或经由电场控制磁化的能力，对于先进的存储器、能量、自旋电子学和其他多功能器件应用，对在室温（RT）下表现出鲁棒ME耦合的新型磁电（ME）材料的兴趣日益增加。获得具有强ME耦合的ME材料，理解其起源，并操纵其加工沿着组合物以实现RT下的大ME系数构成了多铁性研究的重要一步。为了解决这个问题，我们研究了Ni掺杂的Pb（Zr0.20Ti0.80）O-3（PZT）的多铁性和ME性能。我们发现，Ni掺杂PZT的铁电（T-C类似于700 K）和弱铁磁（类似于602 K）相变都远高于室温（RT），导致了11.7 mV cm（-1）Oe（-1）（H-ac = 1 Oe和f = 1 kHz）的强ME耦合系数（alpha（E1）（31））。虽然X射线衍射表明是单相材料，但高分辨率透射电子显微镜显示存在和不存在Ni的区域;因此两相之间的磁电耦合是可能的。第一性原理计算表明，（Ni-Pb）（x）缺陷可能是负责实验观察到的磁性和ME耦合在Ni掺杂PZT。我们进一步证明，Ni掺杂PZT具有低损耗角正切，低漏电流，大的饱和极化，和弱的铁磁性。最终，我们的工作表明，Ni掺杂PZT是一种具有成本效益的RT多铁性与强ME耦合。
There is increasing interest in novel magnetoelectric (ME) materials that exhibit robust ME coupling at room temperature (RT) for advanced memory, energy, spintronics, and other multifunctional device applications, by making use of the ability to control polarization with a magnetic field and/or magnetization via an electric field. Obtaining ME materials with strong ME coupling, understanding the origin, and manipulating its processing along with composition to realize large ME coefficients at RT constitute an important step in multiferroic research. To address this, we have investigated the multiferroic and ME properties of Ni-doped Pb(Zr0.20Ti0.80)O-3 (PZT). We find that the ferroelectric (T-C similar to 700 K) and weak ferromagnetic (similar to 602 K) phase transitions of Ni-doped PZT are well above room temperature (RT), leading to a strong ME coupling coefficient (alpha(E,) (31)) of 11.7 mV cm(-1) Oe(-1) (H-ac = 1 Oe and f = 1 kHz). While x-ray diffraction suggests a single-phase material, high-resolution transmission electron microscopy reveals regions with and without Ni present; thus magnetoelectric coupling between two phases is possible. First-principles calculations suggest the (Ni-Pb)(x) defect is likely to be responsible for the experimental observed magnetism and ME coupling in Ni-doped PZT. We further demonstrate that Ni-doped PZT exhibits low loss tangent, low leakage current, large saturation polarization, and weak ferromagnetism. Ultimately, our work demonstrates that Ni-doped PZT is a cost-effective RT multiferroic with strong ME coupling.