Bias-field-free high frequency microwave emission of spin-transfer nano-oscillator with magnetizations all in-plane
作者： W. Zhang , Y. Zhang , B. Jiang , B. Fang , H. Zhong
DOI: 10.1063/5.0031507
关键词:
摘要: We reported microwave measurements on a nanoscale MgO-based magnetic tunnel junction having an elliptical shape with large aspect ratios to obtain enough in-plane anisotropy ensure free layer magnetization along the long axis. Combined of synthetic antiferromagnet pinned short axis, this results in perpendicular configuration between magnetizations and layers. A steady high frequency oscillation up 5 GHz was achieved such devices at zero field. Meanwhile, tunability 0.11 Hz·cm2/mA (2.67 GHz/mA) obtained. The micromagnetic simulations confirm origin our spin transfer nano-oscillators (STNOs). These suggest great possibility improved integration potential application STNOs for developing next-generation on-chip oscillators.
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sci-hub.st 参考文章(45)
R. Lebrun, A. Jenkins, A. Dussaux, N. Locatelli, S. Tsunegi, E. Grimaldi, H. Kubota, P. Bortolotti, K. Yakushiji, J. Grollier, A. Fukushima, S. Yuasa, V. Cros, Understanding of Phase Noise Squeezing Under Fractional Synchronization of a Nonlinear Spin Transfer Vortex Oscillator. Physical Review Letters. ,vol. 115, pp. 017201- ,(2015) , 10.1103/PHYSREVLETT.115.017201
Bin Fang, Mario Carpentieri, Xiaojie Hao, Hongwen Jiang, Jordan A. Katine, Ilya N. Krivorotov, Berthold Ocker, Juergen Langer, Kang L. Wang, Baoshun Zhang, Bruno Azzerboni, Pedram Khalili Amiri, Giovanni Finocchio, Zhongming Zeng, Giant spin-torque diode sensitivity in the absence of bias magnetic field. Nature Communications. ,vol. 7, pp. 11259- 11259 ,(2016) , 10.1038/NCOMMS11259
Gang Lv, Hong Zhang, Xuecheng Cao, Yaowen Liu, Zhiwei Hou, Yufeng Qin, Guihua Li, Linhui Wang, Modeling of magnetization precession in spin-torque nano-oscillators with a tilted polarizer AIP Advances. ,vol. 5, pp. 077171- ,(2015) , 10.1063/1.4927585
W. Rippard, M. Pufall, S. Kaka, S. Russek, T. Silva, Direct-current induced dynamics in Co90 Fe10/Ni80 Fe20 point contacts. Physical Review Letters. ,vol. 92, pp. 027201- 027201 ,(2004) , 10.1103/PHYSREVLETT.92.027201
Witold Skowronski, Jerzy Wrona, Tomasz Stobiecki, Sebastiaan van Dijken, Spin transfer torque oscillator based on asymmetric magnetic tunnel junctions arXiv: Materials Science. ,(2011) , 10.1143/APEX.5.063005
C. Gonzalez-Fuentes, R. A. Gallardo, P. Landeros, Role of polarizer-tilting-angle in zero-field spin-transfer nano-oscillators with perpendicular anisotropy Applied Physics Letters. ,vol. 107, pp. 142402- ,(2015) , 10.1063/1.4932548
J.C. Slonczewski, Current-driven excitation of magnetic multilayers Journal of Magnetism and Magnetic Materials. ,vol. 159, pp. L1- L7 ,(1996) , 10.1016/0304-8853(96)00062-5
Zhongming Zeng, Kwun Hung Cheung, H. W. Jiang, I. N. Krivorotov, J. A. Katine, V. Tiberkevich, A. Slavin, Evolution of spin-wave modes in magnetic tunnel junction nanopillars Physical Review B. ,vol. 82, pp. 100410- ,(2010) , 10.1103/PHYSREVB.82.100410
Yan Zhou, C. L. Zha, S. Bonetti, J. Persson, Johan Åkerman, Microwave generation of tilted-polarizer spin torque oscillator Journal of Applied Physics. ,vol. 105, ,(2009) , 10.1063/1.3068429
Randy K. Dumas, E. Iacocca, S. Bonetti, S. R. Sani, S. M. Mohseni, A. Eklund, J. Persson, O. Heinonen, Johan Åkerman, Spin-wave-mode coexistence on the nanoscale: a consequence of the Oersted-field-induced asymmetric energy landscape. Physical Review Letters. ,vol. 110, pp. 257202- 257202 ,(2013) , 10.1103/PHYSREVLETT.110.257202