Tuning of current-induced effective magnetic field through Rashba effect engineering in hybrid multiferroic structures

• DOI: 10.1038/s41427-018-0069-7
• Publication Date: 2018-08-08T07:40:04Z
• Authors: Weinan Lin; Shawn David Pollard; Rui Guo; Herng Yau Yoong; Shaohai Chen; Han Wang; Liang Liu; Changjian Li; Xiaojiang Yu; Juanxiu Xiao; Xiao Chi; Jihang Yu; Jing Zhou; Tiejun Zhou; Hyunsoo Yang; Jingsheng Chen
• Keywords: 02 engineering and technology; 0210 nano-technology; 530; 7. Clean energy; 620

Current-induced effective magnetic fields offer a new pathway through spin orbit interaction (SOI) to switch magnetization and have recently attracted great interest. In the conventional heavy metal/ferromagnetic metal/oxide (HM/FM/Oxide) structure, significant efforts been made study role of HM in determining fields. However, very little attention has paid oxide layer its interface with FM, where Rashba effect may affect field. this report, we present tune field by engineering hybrid multiferroic multilayer structure. A ferroelectric BaTiO3, whose polarizations either up or down are controlled engineering, was introduced into SOI structure BaTiO3/CoFeB/Pt. The current-induced increase more than 200% when polarization BaTiO3 changes from down. mainly attributed different induced opposite polarizations. Our offers path towards controlling pave way for integrating other functional oxides spintronic devices. Combining materials route low-power memories, according research scientists Singapore. Locally switching orientation permanent magnet is storing binary data. energy consumption these memories much lower if local current, rather an external field, induces switch. previously demonstrated devices layering metal, ferromagnetic material, material. While many tried, Jingsheng Chen Hyunsoo Yang their colleagues National University Singapore instead used which internal electric They showed that they could altering BaTiO3. Over difference achieved hybrid-multiferroic (BaTiO3/CoFeB/Pt), engineering. works direction integrate