Over 100% magnetoresistance ratio at room temperature in magnetic tunnel junctions with CuGaSe2 spacer layer

2019 ◽  
Vol 114 (17) ◽  
pp. 172402 ◽  
Author(s):  
K. Mukaiyama ◽  
J. W. Jung ◽  
H. Sepehri-Amin ◽  
S. Kasai ◽  
T. Furubayashi ◽  
...  
Keyword(s):  
Room Temperature ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spacer Layer ◽  
Magnetoresistance Ratio

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

Magnetic tunneling junctions based on 2D CrI3 and CrBr3: spin filtering effects and high tunnel magnetoresistance via energy band difference

2021 ◽  
Author(s):  
Li Liu ◽  
Shizhuo Ye ◽  
Jin He ◽  
Qijun Huang ◽  
Hao Wang ◽  
...  
Keyword(s):  
Bias Voltage ◽  
Tunnel Junctions ◽  
Van Der Waals ◽  
Magnetic Tunnel Junctions ◽  
Differential Resistance ◽  
High Tunnel ◽  
Voltage Range ◽  
Negative Differential Resistance Effect ◽  
Magnetoresistance Ratio ◽  
Spin Filtering

Abstract Recently, the study on two-dimensional materials expands to the field of spintronics. The intrinsically ferromagnetic van der Waals materials such as CrI3 and CrBr3 receive much attention due to nearly 100% spin polarization and good stability, resulting in excellent performance in magnetic tunnel junctions. In this work, we design the magnetic tunnel junctions of Cu/CrI3/Cu and Cu/CrBr3/Cu with the electrodes of Cu(111) and the tunneling barrier of 4-monolayer CrI3 or CrBr3. Our first-principle calculations combined with nonequilibrium Green’s function method indicate that the CrBr3-based MTJ has a larger maximum tunneling magnetoresistance ratio than the CrI3-based MTJ. In a wide bias voltage range, the CrI3-based MTJ can maintain high spin filtering performance, while that of the CrBr3-based MTJ degrades sharply as the bias voltage increases. It is noted that negative differential resistance effect is observed in the CrBr3-based MTJ. The differences of spin transport properties between the CrI3-based MTJ and the CrBr3-based MTJ are clarified in terms of the inside device physics, including the spin-dependent projected density of states, band structures, Bloch states, and the electron density difference. This work provides some physical insights for the design of 2D van der Waals MTJ.

Spin-dependent tunneling in epitaxial Fe/Cr/MgO/Fe magnetic tunnel junctions with an ultrathin Cr(001) spacer layer

2009 ◽  
Vol 79 (17) ◽  
Author(s):  
Rie Matsumoto ◽  
Akio Fukushima ◽  
Kay Yakushiji ◽  
Shingo Nishioka ◽  
Taro Nagahama ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spacer Layer

The dependency of tunnel magnetoresistance ratio on nanoscale thicknesses of Co2Fe6B2free and pinned layers for Co2Fe6B2/MgO-based perpendicular-magnetic-tunnel-junctions

Nanoscale ◽  
2015 ◽  
Vol 7 (17) ◽  
pp. 8142-8148 ◽  
Author(s):  
Min-Su Jeon ◽  
Kyo-Suk Chae ◽  
Du-Yeong Lee ◽  
Yasutaka Takemura ◽  
Seung-Eun Lee ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Tunnel Magnetoresistance ◽  
Magnetoresistance Ratio

Very strong antiferromagnetic interlayer exchange coupling with iridium spacer layer for perpendicular magnetic tunnel junctions

2017 ◽  
Vol 110 (9) ◽  
pp. 092406 ◽  
Author(s):  
Kay Yakushiji ◽  
Atsushi Sugihara ◽  
Akio Fukushima ◽  
Hitoshi Kubota ◽  
Shinji Yuasa
Keyword(s):  
Exchange Coupling ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Interlayer Exchange Coupling ◽  
Spacer Layer ◽  
Interlayer Exchange

scholarly journals Very low 1∕f noise at room temperature in fully epitaxial Fe∕MgO∕Fe magnetic tunnel junctions

2007 ◽  
Vol 91 (23) ◽  
pp. 232504 ◽  
Author(s):  
F. G. Aliev ◽  
R. Guerrero ◽  
D. Herranz ◽  
R. Villar ◽  
F. Greullet ◽  
...  
Keyword(s):  
Room Temperature ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions
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