Long-timescale fluctuations in zero-field magnetic vortex oscillations driven by dc spin-polarized current

2009 ◽  
Vol 80 (18) ◽  
Author(s):  
V. S. Pribiag ◽  
G. Finocchio ◽  
B. J. Williams ◽  
D. C. Ralph ◽  
R. A. Buhrman
Keyword(s):  
Magnetic Vortex ◽  
Zero Field ◽  
Spin Polarized

Effect of Dzyaloshinskii-Moriya interaction on the magnetic vortex oscillator driven by spin-polarized current

2015 ◽  
Vol 117 (17) ◽  
pp. 17B720 ◽  
Author(s):  
Shujun Chen ◽  
Senfu Zhang ◽  
Qiyuan Zhu ◽  
Xianyin Liu ◽  
Chendong Jin ◽  
...  
Keyword(s):  
Magnetic Vortex ◽  
Spin Polarized ◽  
Moriya Interaction

Influence of Dzyaloshinskii-Moriya interaction on the magnetic vortex gyration driven by a spin-polarized current

2020 ◽  
Vol 515 ◽  
pp. 167291
Author(s):  
Huanan Li ◽  
Dan Wang ◽  
Yifan Zhao ◽  
Yue Hu ◽  
Ziwei Fan ◽  
...  
Keyword(s):  
Magnetic Vortex ◽  
Spin Polarized ◽  
Moriya Interaction

scholarly journals Towards Laterally Resolved Ferromagnetic Resonance with Spin-Polarized Scanning Tunneling Microscopy

Nanomaterials ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 827
Author(s):  
Marie Hervé ◽  
Moritz Peter ◽  
Timofey Balashov ◽  
Wulf Wulfhekel
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Ferromagnetic Resonance ◽  
Tunneling Current ◽  
Magnetic Vortex ◽  
Scanning Tunneling ◽  
Tunneling Junction ◽  
Resonance Signal ◽  
Tunneling Microscopy ◽  
Spin Polarized ◽  
Local Detection

We used a homodyne detection to investigate the gyration of magnetic vortex cores in Fe islands on W(110) with spin-polarized scanning tunneling microscopy at liquid helium temperatures. The technique aims at local detection of the spin precession as a function of frequency using a radio-frequency (rf) modulation of the tunneling bias voltage. The gyration was excited by the resulting spin-polarized rf current in the tunneling junction. A theoretical analysis of different contributions to the frequency-dependent signals expected in this technique is given. These include, besides the ferromagnetic resonance signal, also signals caused by the non-linearity of the I ( U ) characteristics. The vortex gyration was modeled with micromagnetic finite element methods using realistic parameters for the tunneling current, its spin polarization, and the island shape, and simulations were compared with the experimental results. The observed signals are presented and critically analyzed.

scholarly journals Magnetic vortex-antivortex crystals generated by spin-polarized current

2012 ◽  
Vol 86 (14) ◽  
Author(s):  
Yuri Gaididei ◽  
Oleksii M. Volkov ◽  
Volodymyr P. Kravchuk ◽  
Denis D. Sheka
Keyword(s):  
Magnetic Vortex ◽  
Spin Polarized

The magnetic vortex gyration mediated by spin-polarized current in a confined off-centered nanocontact structure

2017 ◽  
Vol 251 ◽  
pp. 60-65 ◽  
Author(s):  
Huanan Li ◽  
Dongfei Li ◽  
Yaxin Wang ◽  
Zhong Hua
Keyword(s):  
Magnetic Vortex ◽  
Spin Polarized

scholarly journals Spin-polarized Weyl cones and giant anomalous Nernst effect in ferromagnetic Heusler films

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Kazuki Sumida ◽  
Yuya Sakuraba ◽  
Keisuke Masuda ◽  
Takashi Kono ◽  
Masaaki Kakoki ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Remanent Magnetization ◽  
Room Temperature ◽  
High Efficiency ◽  
Quantum Critical Point ◽  
Surface States ◽  
Flat Band ◽  
Zero Field ◽  
Topological Quantum ◽  
Spin Polarized

AbstractWeyl semimetals are characterized by the presence of massless band dispersion in momentum space. When a Weyl semimetal meets magnetism, large anomalous transport properties emerge as a consequence of its topological nature. Here, using in−situ spin- and angle-resolved photoelectron spectroscopy combined with ab initio calculations, we visualize the spin-polarized Weyl cone and flat-band surface states of ferromagnetic Co2MnGa films with full remanent magnetization. We demonstrate that the anomalous Hall and Nernst conductivities systematically grow when the magnetization-induced massive Weyl cone at a Lifshitz quantum critical point approaches the Fermi energy, until a high anomalous Nernst thermopower of  ~6.2 μVK−1 is realized at room temperature. Given this topological quantum state and full remanent magnetization, Co2MnGa films are promising for realizing high efficiency heat flux and magnetic field sensing devices operable at room temperature and zero-field.

scholarly journals Controlling of magnetic vortex chirality and polarity by spin-polarized current

2015 ◽  
Vol 64 (24) ◽  
pp. 247505
Author(s):  
Sun Ming-Juan ◽  
Liu Yao-Wen
Keyword(s):  
Magnetic Vortex ◽  
Spin Polarized
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