Key Laboratory for Magnetism and Magnetic Materials of MOE, Lanzhou University, Lanzhou 730000, People's Republic of China.
Phys Chem Chem Phys. 2018 Oct 17;20(40):25854-25860. doi: 10.1039/c8cp05106b.
We investigate the room-temperature, electric-field-mediated, non-volatile 180° switching of the unidirectional anisotropy field in an IrMn/CoFeB/Ta/Pb(Mg1/3Nb2/3)O3-PbTiO3 heterostructure. The variation in exchange bias under different electric fields appears clearly in the magnetic hysteresis loops. The remnant magnetization as a function of electric field, as determined by static magnetic measurements, exhibits a non-volatile behavior, which is consistent with the results of the ferromagnetic resonance field as a function of electric field. Moreover, the measured ferromagnetic resonance shows that the uniaxial magnetic anisotropy field is non-volatile and the unidirectional anisotropy field undergoes 180° switching that can be acquired and separated distinctly. This result is attributed to the piezo-strain effect. The electric-field-mediated non-volatile 180° switching of the unidirectional anisotropy field paves the way for sensors and other spintronic devices.
我们研究了在 IrMn/CoFeB/Ta/Pb(Mg1/3Nb2/3)O3-PbTiO3 异质结构中，室温下电场介导的、非易失性的单向各向异性场 180°开关。在不同电场下的交换偏置变化在磁滞回线中清晰可见。通过静态磁测量确定的剩余磁化强度随电场的变化表现出非易失性行为，这与铁磁共振场随电场的变化结果一致。此外，测量的铁磁共振表明，单轴各向异性场是非易失性的，单向各向异性场经历 180°开关，可明显获取和分离。这一结果归因于压应变效应。这种非易失性的电场介导的单向各向异性场 180°开关为传感器和其他自旋电子器件铺平了道路。
