Tunneling Phenomena as a Probe to Investigate Atomic Scale Fluctuations in Metal/Oxide/Metal Magnetic Tunnel Junctions

2000 ◽  
Vol 85 (4) ◽  
pp. 876-879 ◽  
Author(s):  
V. Da Costa ◽  
C. Tiusan ◽  
T. Dimopoulos ◽  
K. Ounadjela
Keyword(s):  
Metal Oxide ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Atomic Scale ◽  
Tunneling Phenomena

Role of Metal-Oxide Interface in Determining the Spin Polarization of Magnetic Tunnel Junctions

Science ◽  
1999 ◽  
Vol 286 (5439) ◽  
pp. 507-509 ◽  
Author(s):  
Jose Maria De Teresa ◽  
Agnès Barthélémy ◽  
Albert Fert ◽  
Jean Pierre Contour ◽  
François Montaigne ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Metal Oxide ◽  
Spin Polarization ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Ferromagnetic Transition ◽  
Oxide Interface ◽  
Oxide Interfaces ◽  
Structure Of Metal

The role of the metal-oxide interface in determining the spin polarization of electrons tunneling from or into ferromagnetic transition metals in magnetic tunnel junctions is reported. The spin polarization of cobalt in tunnel junctions with an alumina barrier is positive, but it is negative when the barrier is strontium titanate or cerium lanthanite. The results are ascribed to bonding effects at the transition metal–barrier interface. The influence of the electronic structure of metal-oxide interfaces on the spin polarization raises interesting fundamental problems and opens new ways to optimize the magnetoresistance of tunnel junctions.

Atomic-Scale Structure and Local Chemistry of CoFeB–MgO Magnetic Tunnel Junctions

Nano Letters ◽  
2016 ◽  
Vol 16 (3) ◽  
pp. 1530-1536 ◽  
Author(s):  
Zhongchang Wang ◽  
Mitsuhiro Saito ◽  
Keith P. McKenna ◽  
Shunsuke Fukami ◽  
Hideo Sato ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Scale Structure ◽  
Atomic Scale ◽  
Atomic Scale Structure

First Principles Study of Atomic-Scale Al2O3 Films as Insulators for Magnetic Tunnel Junctions

2000 ◽  
Vol 39 (Part 2, No. 5B) ◽  
pp. L479-L481 ◽  
Author(s):  
Noriko Watari ◽  
Mineo Saito ◽  
Hisanao Tsuge ◽  
Osamu Sugino ◽  
Shuhei Ohnishi
Keyword(s):  
First Principles ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Atomic Scale ◽  
First Principles Study ◽  
Al2o3 Films

Atomic-scale spectroscopic imaging of CoFeB/Mg–B–O/CoFeB magnetic tunnel junctions

2009 ◽  
Vol 95 (3) ◽  
pp. 032506 ◽  
Author(s):  
J. J. Cha ◽  
J. C. Read ◽  
W. F. Egelhoff ◽  
P. Y. Huang ◽  
H. W. Tseng ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spectroscopic Imaging ◽  
Atomic Scale

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

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
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