Spin-transfer torque switched magnetic tunnel junctions in magnetic random access memory

2016 ◽  
Author(s):  
Jonathan Z. Sun
Keyword(s):  
Tunnel Junctions ◽  
Random Access ◽  
Magnetic Tunnel Junctions ◽  
Random Access Memory ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Access Memory ◽  
Magnetic Random Access Memory

TETRAGONAL HEUSLER-LIKE Mn–Ga ALLOYS BASED PERPENDICULAR MAGNETIC TUNNEL JUNCTIONS

SPIN ◽  
2014 ◽  
Vol 04 (04) ◽  
pp. 1440024 ◽  
Author(s):  
QINLI MA ◽  
ATSUSHI SUGIHARA ◽  
KAZUYA SUZUKI ◽  
XIANMIN ZHANG ◽  
TERUNOBU MIYAZAKI ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Random Access ◽  
Magnetic Tunnel Junctions ◽  
Perpendicular Magnetic Anisotropy ◽  
Random Access Memory ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Current Status ◽  
Access Memory ◽  
Magnetic Random Access Memory

Films of the Mn -based tetragonal Heusler-like alloys, such as Mn – Ga , exhibit a large perpendicular magnetic anisotropy (PMA), small damping constant, small saturation magnetization and large spin polarizations. These properties are attractive for the application to the next generation high density spin-transfer-torque (STT) magnetic random access memory (STT-MRAM). We reviewed the structure, magnetic properties and Gilbert damping of the alloy films with large PMA, and the current status of research on tunnel magnetoresistance (TMR) in perpendicular magnetic tunnel junctions (p-MTJs) based on Mn -based tetragonal Heusler-like alloy electrode, and also discuss the issues for the application of those to STT-MRAM.

Spin-transfer torque switching in magnetic tunnel junctions and spin-transfer torque random access memory

2007 ◽  
Vol 19 (16) ◽  
pp. 165209 ◽  
Author(s):  
Zhitao Diao ◽  
Zhanjie Li ◽  
Shengyuang Wang ◽  
Yunfei Ding ◽  
Alex Panchula ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Random Access ◽  
Magnetic Tunnel Junctions ◽  
Random Access Memory ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Access Memory

WRITE ERROR RATE IN SPIN TRANSFER TORQUE MAGNETIC RANDOM ACCESS MEMORY

SPIN ◽  
2012 ◽  
Vol 02 (03) ◽  
pp. 1240001 ◽  
Author(s):  
ZIHUI WANG ◽  
YUCHEN ZHOU ◽  
JING ZHANG ◽  
YIMING HUAI
Keyword(s):  
Error Rate ◽  
Random Access ◽  
Magnetic Tunnel Junction ◽  
Random Access Memory ◽  
Underlying Mechanism ◽  
Theoretical Description ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Access Memory ◽  
Magnetic Random Access Memory

This paper reviews the recent progress made to realize reliable write operations in spin transfer torque magnetic random access memory. Theoretical description of write error rate (WER) based on macro-spin models are discussed with comparison to experimental data. Recent studies on the phenomena that can lead to abnormal WER behaviors which include back-hopping and low probability bifurcated switching are reviewed with emphasis on underlying mechanism. The studies on the WER in perpendicular magnetic tunnel junction (MTJ) are also reviewed. It is demonstrated that, for both in-plane and perpendicular MTJ, reliable and error-free write operations can be achieved with thorough understanding of the underlying physics and innovative design/process solutions.

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