scholarly journals Electron holography investigation on the barrier structures of Co based magnetic tunnel junctions

2005 ◽  
Vol 54 (12) ◽  
pp. 5861
Author(s):  
Zhang Zhe ◽  
Zhu Tao ◽  
Feng Yu-Qing ◽  
Zhang Ze
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Electron Holography

scholarly journals An electron holography study of perpendicular magnetic tunnel junctions nanostructured by deposition on pre-patterned conducting pillars

Nanoscale ◽  
2020 ◽  
Vol 12 (33) ◽  
pp. 17312-17318
Author(s):  
V. Boureau ◽  
V. D. Nguyen ◽  
A. Masseboeuf ◽  
A. Palomino ◽  
E. Gautier ◽  
...  
Keyword(s):  
Magnetic Induction ◽  
Tunnel Junctions ◽  
Random Access ◽  
Magnetic Tunnel Junctions ◽  
Temperature Behavior ◽  
Electron Holography ◽  
Induction Field ◽  
Magnetic Induction Field

Electron holography investigation of the magnetic induction field of perpendicular magnetic tunnel junctions for the fabrication of magnetic random access memories (MRAM), and temperature behavior.

scholarly journals Study on the barriers in magnetic tunnel junctions by electron holography

2003 ◽  
Vol 9 (S02) ◽  
pp. 312-313
Author(s):  
F. Shen ◽  
T. Zhu ◽  
X. Xiang ◽  
John Q. Xiao ◽  
Z. Zhang
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Electron Holography

Electron Holography of Barrier Structures in Co/ZrAlO x /Co Magnetic Tunnel Junctions

2005 ◽  
Vol 22 (7) ◽  
pp. 1732-1735
Author(s):  
Zhang Zhe ◽  
Zhu Tao ◽  
Shen Feng ◽  
Sheng Wen-Ting ◽  
Wang Wei-Gang ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Electron Holography

Interlayer Exchange Coupling in Single Crystal Magnetic Tunnel Junctions Studied by Electron Holography

2007 ◽  
Vol 1026 ◽  
Author(s):  
Etienne Snoeck ◽  
Coriolan Tiusan ◽  
Fanny Greullet ◽  
Gerard Benassayag ◽  
Pierre Baules ◽  
...  
Keyword(s):  
Single Crystal ◽  
Exchange Coupling ◽  
Tunnel Junctions ◽  
Ion Irradiation ◽  
Magnetic Tunnel Junctions ◽  
Electron Holography ◽  
Ferromagnetic Coupling ◽  
Antiferromagnetic Exchange ◽  
Interlayer Exchange Coupling ◽  
Interlayer Exchange

AbstractIon irradiation has been performed on epitaxial Fe/MgO/Fe magnetic tunnel junctions exhibiting antiferromagnetic exchange coupling. Electron holography and VSM experiments show that the amplitude and the nature of the coupling are modified by the irradiation. We demonstrate that the roughness induced by the irradiation at the Fe/MgO interfaces destroys the AF coupling. The biquadratic coupling experimentally observed in the irradiated samples is the result of the competition between local antiferromagnetic and ferromagnetic coupling. For the largest irradiation doses, the net coupling becomes ferromagnetic.

Structural and magneto-transport properties of lattice-mismatched epitaxial Fe/SrO/MgO/Fe magnetic tunnel junctions

2020 ◽  
Vol 59 (10) ◽  
pp. 103001
Author(s):  
Aurelie Spiesser ◽  
Shintaro Kon ◽  
Yukiko Yasukawa ◽  
Shinji Yuasa ◽  
Hiroshi Imamura ◽  
...  
Keyword(s):  
Transport Properties ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions

scholarly journals Electrical characterisation of higher order spin wave modes in vortex-based magnetic tunnel junctions

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Alex. S. Jenkins ◽  
Lara San Emeterio Alvarez ◽  
Samh Memshawy ◽  
Paolo Bortolotti ◽  
Vincent Cros ◽  
...  
Keyword(s):  
Spin Wave ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Higher Order ◽  
Spin Torque ◽  
Micromagnetic Simulations ◽  
Higher Order Modes ◽  
Spin Diode ◽  
Super High Frequency ◽  
Wave Modes

AbstractNiFe-based vortex spin-torque nano-oscillators (STNO) have been shown to be rich dynamic systems which can operate as efficient frequency generators and detectors, but with a limitation in frequency determined by the gyrotropic frequency, typically sub-GHz. In this report, we present a detailed analysis of the nature of the higher order spin wave modes which exist in the Super High Frequency range (3–30 GHz). This is achieved via micromagnetic simulations and electrical characterisation in magnetic tunnel junctions, both directly via the spin-diode effect and indirectly via the measurement of the coupling with the gyrotropic critical current. The excitation mechanism and spatial profile of the modes are shown to have a complex dependence on the vortex core position. Additionally, the inter-mode coupling between the fundamental gyrotropic mode and the higher order modes is shown to reduce or enhance the effective damping depending upon the sense of propagation of the confined spin wave.

Interfacial Control via Reversible Ionic Motion in Battery‐Like Magnetic Tunnel Junctions

2021 ◽  
pp. 2100512
Author(s):  
Guofei Long ◽  
Qian Xue ◽  
Qiang Li ◽  
Yu Shi ◽  
Lin Li ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Ionic Motion
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