Tunnel magnetoresistance and spin torque switching in MgO-based magnetic tunnel junctions with a Co/Ni multilayer electrode

2010 ◽  
Vol 97 (7) ◽  
pp. 072513 ◽  
Author(s):  
Takahiro Moriyama ◽  
Theodore J. Gudmundsen ◽  
Pinshane Y. Huang ◽  
Luqiao Liu ◽  
David A. Muller ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spin Torque ◽  
Tunnel Magnetoresistance ◽  
Multilayer Electrode

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.

scholarly journals Large Inverse Tunnel Magnetoresistance in Magnetic Tunnel Junctions with an Fe3O4 Electrode

2021 ◽  
Vol 15 (3) ◽  
Author(s):  
Shoma Yasui ◽  
Syuta Honda ◽  
Jun Okabayashi ◽  
Takashi Yanase ◽  
Toshihiro Shimada ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Tunnel Magnetoresistance

scholarly journals Exceeding 400% tunnel magnetoresistance at room temperature in epitaxial Fe/MgO/Fe(001) spin-valve-type magnetic tunnel junctions

2021 ◽  
Vol 118 (4) ◽  
pp. 042411
Author(s):  
Thomas Scheike ◽  
Qingyi Xiang ◽  
Zhenchao Wen ◽  
Hiroaki Sukegawa ◽  
Tadakatsu Ohkubo ◽  
...  
Keyword(s):  
Room Temperature ◽  
Tunnel Junctions ◽  
Spin Valve ◽  
Magnetic Tunnel Junctions ◽  
Tunnel Magnetoresistance

Bias voltage effect on tunnel magnetoresistance in fully epitaxial MgO double-barrier magnetic tunnel junctions

2005 ◽  
Vol 86 (8) ◽  
pp. 082501 ◽  
Author(s):  
T. Nozaki ◽  
A. Hirohata ◽  
N. Tezuka ◽  
S. Sugimoto ◽  
K. Inomata
Keyword(s):  
Bias Voltage ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Double Barrier ◽  
Tunnel Magnetoresistance

Enhanced tunnel magnetoresistance in Mn-based perpendicular magnetic tunnel junctions utilizing antiferromagnetically coupled bcc-Co-based interlayer

2021 ◽  
Vol 118 (17) ◽  
pp. 172412
Author(s):  
Kazuya Z. Suzuki ◽  
Tomohiro Ichinose ◽  
Satoshi Iihama ◽  
Ren Monma ◽  
Shigemi Mizukami
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Tunnel Magnetoresistance

Resonant spin-torque in double barrier magnetic tunnel junctions

2006 ◽  
Vol 355 (3) ◽  
pp. 243-246 ◽  
Author(s):  
A. Vedyayev ◽  
N. Ryzhanova ◽  
B. Dieny ◽  
N. Strelkov
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spin Torque ◽  
Double Barrier
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