Superparamagnetism in MgO-based magnetic tunnel junctions with a thin pinned ferromagnetic electrode

2010 ◽  
Vol 81 (20) ◽  
Author(s):  
J. F. Feng ◽  
J. Y. Chen ◽  
M. Venkatesan ◽  
G. Feng ◽  
X. F. Han ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Ferromagnetic Electrode

MAGNETORESISTANCE IN Fe/MgO/Fe MAGNETIC TUNNEL JUNCTIONS

2007 ◽  
Vol 17 (03) ◽  
pp. 593-598 ◽  
Author(s):  
N. N. BELETSKII ◽  
S. A. BORYSENKO ◽  
V. M. YAKOVENKO ◽  
G. P. BERMAN ◽  
S. A. WOLF
Keyword(s):  
Current Density ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Tunneling Magnetoresistance ◽  
Electron Current ◽  
Ferromagnetic Electrode ◽  
Electron Current Density

The magnetoresistance of Fe/MgO/Fe magnetic tunnel junctions (MTJs) was studied taking into consideration image forces. For MTJs with an MgO insulator, explanations are given of the giant tunneling magnetoresistance (TMR) effect and the effect of the increasing TMR with an increase in MgO insulator thickness. It is demonstrated that the electron current density through MTJs can be high enough to switch the magnetization of a ferromagnetic electrode.

Fabrication of Magnetic Tunnel Junctions with Amorphous CoFeSiB Ferromagnetic Electrode for Magnetic Field Sensor Devices

2013 ◽  
Vol 6 (10) ◽  
pp. 103004 ◽  
Author(s):  
Daiki Kato ◽  
Mikihiko Oogane ◽  
Kosuke Fujiwara ◽  
Takuo Nishikawa ◽  
Hiroshi Naganuma ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Magnetic Field Sensor ◽  
Ferromagnetic Electrode ◽  
Sensor Devices ◽  
Field Sensor

scholarly journals Effect of oxidizing the ferromagnetic electrode in magnetic tunnel junctions on tunneling magnetoresistance

2012 ◽  
Vol 100 (17) ◽  
pp. 172406 ◽  
Author(s):  
Sungjung Joo ◽  
K. Y. Jung ◽  
B. C. Lee ◽  
Tae-Suk Kim ◽  
K. H. Shin ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Tunneling Magnetoresistance ◽  
Ferromagnetic Electrode

Epitaxial wurtzite-MgZnO barrier based magnetic tunnel junctions deposited on a metallic ferromagnetic electrode

2015 ◽  
Vol 106 (25) ◽  
pp. 252403 ◽  
Author(s):  
M. Belmoubarik ◽  
M. Al-Mahdawi ◽  
H. Sato ◽  
T. Nozaki ◽  
M. Sahashi
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Ferromagnetic Electrode

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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