scholarly journals Role of boron diffusion in CoFeB/MgO magnetic tunnel junctions

2015 ◽  
Vol 91 (8) ◽  
Author(s):  
Sumanta Mukherjee ◽  
Ronny Knut ◽  
S. M. Mohseni ◽  
T. N. Anh Nguyen ◽  
S. Chung ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Boron Diffusion

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.

Role of interfacial roughness on bias-dependent magnetoresistance and transport properties in magnetic tunnel junctions

2005 ◽  
Vol 98 (10) ◽  
pp. 103504 ◽  
Author(s):  
J. C. A. Huang ◽  
C. Y. Hsu ◽  
Y. F. Liao ◽  
M. Z. Lin ◽  
C. H. Lee
Keyword(s):  
Transport Properties ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Interfacial Roughness

Boron diffusion induced symmetry reduction and scattering in CoFeB/MgO/CoFeB magnetic tunnel junctions

2013 ◽  
Vol 87 (1) ◽  
Author(s):  
Zhaoqiang Bai ◽  
Lei Shen ◽  
Qingyun Wu ◽  
Minggang Zeng ◽  
Jian-Sheng Wang ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Symmetry Reduction ◽  
Boron Diffusion

Role of Synthetic Ferrimagnets in Magnetic Tunnel Junctions from Wave Packet Dynamics

2012 ◽  
Vol 51 (2) ◽  
pp. 02BM03
Author(s):  
Mitsuhiro Arikawa ◽  
Masakazu Muraguchi ◽  
Yasuhiro Hatsugai ◽  
Kenji Shiraishi ◽  
Tetsuo Endoh
Keyword(s):  
Wave Packet ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Wave Packet Dynamics

THE ROLE OF ULTRA-SMALL MAGNETIC GRAINS IN DISORDERED GRANULAR FERROMAGNETS

2005 ◽  
Vol 04 (05n06) ◽  
pp. 887-892
Author(s):  
AVRAHAM Y. DOKOW ◽  
DORON BARNESS ◽  
AVIAD FRYDMAN
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Granular Systems ◽  
Granular Films ◽  
Potential Applications ◽  
The Impact

We present magnetoresistance (MR) measurements on two unique granular ferromagnetic geometries: nanosized granular systems and magnetic tunnel junctions employing a granular electrode. In both systems the saturation fields of the magnetoresistance as well as the MR magnitudes are much larger than that of usual granular films. We interpret these results as being due to the impact of ultrasmall grains. The presence of such nanograins in a random granular array is usually undetectable since their influence on transport, magnetization and magnetoresistance is negligible. Our samples emphasize the role played by these grains leading to a number of unique effects and potential applications.

scholarly journals Critical role of interface states for spin-dependent tunneling in half-metallic Co2MnSi-based magnetic tunnel junctions investigated by tunneling spectroscopy

2009 ◽  
Vol 94 (9) ◽  
pp. 092503 ◽  
Author(s):  
Takayuki Ishikawa ◽  
Naoki Itabashi ◽  
Tomoyuki Taira ◽  
Ken-ichi Matsuda ◽  
Tetsuya Uemura ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Critical Role ◽  
Magnetic Tunnel Junctions ◽  
Tunneling Spectroscopy ◽  
Interface States ◽  
Half Metallic
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