论文标题
自旋扭矩振荡器和磁化强度切换在双屏障Rashba Zeeman磁性隧道连接处
Spin Torque Oscillator and Magnetization Switching in double barrier Rashba Zeeman Magnetic Tunnel Junction
论文作者
论文摘要
在这封信中，我们研究了基于旋转扭矩的磁化振荡和在Rashba -Zeeman（RZ），Ruderman -Kitlel -Kasuya -Kasuya -Yoside（Rkky）和Dzyaloshinskii -Moriya -Moriya（DM）相互作用的情况下进行切换。该系统具有稳定的磁化振荡，可以作为振荡器或切换器起作用，在合适的自旋传输扭矩（STT）下的Rkky和DM相互作用的强度有显着差异。对于提出的具有相同rkky和DM相互作用的系统的系统，观察到磁化振荡的非线性特征。但是，这种振荡的非线性可以通过外部磁场降低或考虑具有合适的RZ相互作用的材料。除此之外，我们的研究表明，可以使用合适的STT调整磁化切换。还观察到切换时间对层厚度的依赖性。同样，开关速度随着具有相同rkky和DM相互作用的系统的厚度而增加，或者由Rkky相互作用主导。当DM相互作用在Rkky相互作用上占主导地位时，可以看到相反的特征。
In this letter, we have studied the spin torque based magnetization oscillations and switching in presence of Rashba - Zeeman (RZ), Ruderman - Kittel - Kasuya - Yoside (RKKY) and Dzyaloshinskii - Moriya (DM) interactions in a double barrier RZ$|$Heavy Metal (HM)$|$RZ magnetic tunnel junction (MTJ). The system has stable magnetization oscillations and can work as an oscillator or a switcher for a significant difference in the strength of RKKY and DM interaction under suitable spin transfer torque (STT). For the proposed system with same order of RKKY and DM interaction, a nonlinear characteristic of the magnetization oscillation is observed. However, this nonlinearity of oscillations can be reduced by an external magnetic field or considering a material with suitable RZ interaction. In addition to this, our study reveals the magnetization switching can be tuned by using suitable STT. A dependence of switching time on layer thickness is also observed. Also, the switching speed increases with the thickness for systems having either same order of RKKY and DM interaction or dominated by RKKY interaction. An opposite characteristic is seen when DM interaction dominates over RKKY interaction.
