Spin transfer torque enhancement in dual spin valves in the ballistic regime

P. Yan; Z. Z. Sun; X. R. Wang

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Spin transfer torque enhancement in dual spin valves in the ballistic regime

机译：弹道状态下双自旋阀的自旋传递扭矩增强

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The spin transfer torque in an all-metal dual spin valve, in which two antiparallel-aligned pinned ferromagnetic layers are on the two sides of a free ferromagnetic layer with two thin normal metal spacers in between, is studied in the ballistic regime. It is argued that, similar to the results in the diffusive regime, the spin transfer torque is dramatically enhanced in comparison to that in a conventional spin valve in the ballistic regime. Within the Slonczewski approach, an analytical expression of the torque on the free magnetic layer is obtained, which may serve as a theoretical model for the micromagnetic simulation of the spin dynamics in a dual spin valve. Depending on the orientation of the free layer and the degree of electron polarization, the spin transfer torque enhancement could be tenfold. The general cases when transmission and reflection probabilities of the free layer are different from zero or one are also numerically calculated.

机译：在弹道状态下，研究了全金属双自旋阀中的自旋传递扭矩，在该自旋传递扭矩中，两个反平行排列的固定铁磁层位于自由铁磁层的两侧，且中间有两个薄的普通金属垫片。据认为，与扩散状态下的结果相似，与弹道状态下的传统自旋阀相比，自旋传递转矩得到了显着提高。在Slonczewski方法中，获得了自由磁性层上转矩的解析表达式，该表达式可以用作双自旋阀中自旋动力学微磁仿真的理论模型。取决于自由层的取向和电子极化的程度，自旋转移扭矩的增强可以是十倍。还通过数值计算了自由层的透射和反射概率不同于零或一的一般情况。

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来源
《Physical review》 |2011年第17期|p.174430.1-174430.8|共8页
作者
P. Yan; Z. Z. Sun; X. R. Wang;
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作者单位

Physics Department, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, China;

Institute for Theoretical Physics, University of Regensburg, D-93040 Regensburg, Germany;

Physics Department, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, China;

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正文语种 eng
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spin polarized transport in metals; magnetization reversal mechanisms; magnetic device characterization, design, and modeling; magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields;

机译：在金属中旋转极化传输;磁化反转机制;磁性设备的表征;设计和建模;磁电子学自旋电子学：利用自旋极化传输或集成磁场的设备;

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1. Multiple Reflection Effect on Spin-Transfer Torque Dynamics in Spin Valves with a Single or Dual Polarizer [J] . Weiwei Zhu, Zongzhi Zhang, Jianwei Zhang, SPIN . 2015,第1期

机译：单偏光镜或双偏光镜对自旋阀自旋传递转矩动力学的多重反射效应
2. Controllable spin-transfer torque on an antiferromagnet in a dual spin-valve [J] . Jacob Linder Physical review . 2011,第9期

机译：双自旋阀中反铁磁体上的可控自旋传递扭矩
3. Thickness dependence and the role of spin transfer torque in nonlinear giant magnetoresistance of permalloy dual spin valves [J] . N. Banerjee, A. Aziz, M. Ali, Physical review . 2010,第22期

机译：厚度依赖性和自旋传递扭矩在坡莫合金双自旋阀非线性巨磁电阻中的作用
4. (07C913) Spin-transfer-torque switching in spin valve structures with perpendicular, canted, and in-plane magnetic anisotropies [C] . U. Roy, H. Seinige, F. Ferdousi Annual Conference on Magnetism and Magnetic Materials . 2012

机译：（07C913）旋转转移扭矩在旋转阀结构中，垂直，倾斜和面内磁各向异性
5. The spin Hall effect induced spin transfer torque in magnetic heterostructures [D] . Pai, Chi-Feng. 2015

机译：自旋霍尔效应在磁异质结构中引起自旋传递转矩
6. Nanoscale interface confinement of ultrafast spin transfer torque driving non-uniform spin dynamics [O] . Ilya Razdolski, Alexandr Alekhin, Nikita Ilin, -1

机译：超快自旋传递扭矩的纳米级界面限制驱动非均匀自旋动力学
7. Spin transfer torque enhancement in dual spin valve in the ballistic regime [O] . Yan, P., Sun, Z. Z., Wang, X. R. 2010

机译：弹道中双自旋阀的自旋传递扭矩增强政权

Spin transfer torque enhancement in dual spin valves in the ballistic regime

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