Magnetic Tunnel Junction and MRAM
description
Transcript of Magnetic Tunnel Junction and MRAM
![Page 1: Magnetic Tunnel Junction and MRAM](https://reader030.fdocuments.us/reader030/viewer/2022033018/5681320f550346895d98655c/html5/thumbnails/1.jpg)
1
Magnetic Tunnel Junction and MRAM
Marcus Rosales
![Page 2: Magnetic Tunnel Junction and MRAM](https://reader030.fdocuments.us/reader030/viewer/2022033018/5681320f550346895d98655c/html5/thumbnails/2.jpg)
2
Random Access Memory
RAM Main memory storage device
Semiconductor Memory
http://en.wikipedia.org/wiki/File:Memory_module_DDRAM_20-03-2006.jpg
![Page 3: Magnetic Tunnel Junction and MRAM](https://reader030.fdocuments.us/reader030/viewer/2022033018/5681320f550346895d98655c/html5/thumbnails/3.jpg)
3
Energy Consumption
High energy consumption Charge leakage Heat production
Moore’s Law
http://blogs.arm.com/smart-connected-devices/110-no-need-to-whine-about-transistor-leakage
/
http://home.fnal.gov/~carrigan/pillars/web_Moores_law.htm
![Page 4: Magnetic Tunnel Junction and MRAM](https://reader030.fdocuments.us/reader030/viewer/2022033018/5681320f550346895d98655c/html5/thumbnails/4.jpg)
4
Motivations for Research
Magnetic random access memory (MRAM)
http://www.intechopen.com/books/electronic-properties-of-carbon-nanotubes/carbon-nanotube-based-magnetic-tunnel-junctions-mtjs-for-spintronics-application
![Page 5: Magnetic Tunnel Junction and MRAM](https://reader030.fdocuments.us/reader030/viewer/2022033018/5681320f550346895d98655c/html5/thumbnails/5.jpg)
5
About the Research
Giant magnetoresistance (GMR)
Magnetic tunnel junction (MTJ)
Similar: Parallel: Low Resistance Anti-parallel: High
Resistance
http://en.wikipedia.org/wiki/Tunnel_magnetoresistance
http://www.intechopen.com/books/electronic-properties-of-carbon-nanotubes/carbon-nanotube-based-magnetic-tunnel-junctions-mtjs-for-spintronics-application
![Page 6: Magnetic Tunnel Junction and MRAM](https://reader030.fdocuments.us/reader030/viewer/2022033018/5681320f550346895d98655c/html5/thumbnails/6.jpg)
6
Photolithography
Photolithography Photo=Light Lithos=Stone Graphy=Writing
http://www.dileepnanotech.com/articles/Lithography.html
http://www.prweb.com/releases/2007/02/prweb505378.html
http://www.superstock.com/stock-photos-images/1566-584361
![Page 7: Magnetic Tunnel Junction and MRAM](https://reader030.fdocuments.us/reader030/viewer/2022033018/5681320f550346895d98655c/html5/thumbnails/7.jpg)
Nano-fabrication
7
IrMn
Ta
Ru
Ta
Ru CoFeB
Ta
Ru
CoFe
CoFe
CoFeBMgO
OxygenPlasma
Ar + ion beamSiO2
Deposition
Planarization Top Electrode Deposition
R = 200nmWeigang Wang
![Page 8: Magnetic Tunnel Junction and MRAM](https://reader030.fdocuments.us/reader030/viewer/2022033018/5681320f550346895d98655c/html5/thumbnails/8.jpg)
8
Conclusion
http://ixbtlabs.com/articles2/intel-65nm/
http://wallpoper.com/wallpaper/electronics-micro-366490
MTJ and spin-tronics MRAM▪ Nonvolatile ▪ Energy Efficient
Applications outside of information storage.
![Page 9: Magnetic Tunnel Junction and MRAM](https://reader030.fdocuments.us/reader030/viewer/2022033018/5681320f550346895d98655c/html5/thumbnails/9.jpg)
9
Acknowledgments
NSF Nasa space grant members Nasa space grant administration and metors Other thanks
Rebekah Cross, Amber Hawkins, Dr. Pitucco, and Dr. Manne.
Weigang Wang Graduate students:
Ty Newhouse-Illige Hamid Almasi
Undergraduate students: Christian Dane Gentry
![Page 11: Magnetic Tunnel Junction and MRAM](https://reader030.fdocuments.us/reader030/viewer/2022033018/5681320f550346895d98655c/html5/thumbnails/11.jpg)
11
Heat flux simulation using COMSOL
http://www.intechopen.com/books/electronic-properties-of-carbon-nanotubes/carbon-nanotube-based-magnetic-tunnel-junctions-mtjs-for-spintronics-application
![Page 12: Magnetic Tunnel Junction and MRAM](https://reader030.fdocuments.us/reader030/viewer/2022033018/5681320f550346895d98655c/html5/thumbnails/12.jpg)
12
Resistance of GMR
https://www1.hgst.com/hdd/technolo/gmr/gmr.htm
![Page 13: Magnetic Tunnel Junction and MRAM](https://reader030.fdocuments.us/reader030/viewer/2022033018/5681320f550346895d98655c/html5/thumbnails/13.jpg)
13
Other Applications of Spin-tronics
Bio-sensor An analytical device, used for the
detection of a substance or chemical constituent that is of interest in an analytical procedure, for a biological component.
Spin Battery Quantum Computing
![Page 14: Magnetic Tunnel Junction and MRAM](https://reader030.fdocuments.us/reader030/viewer/2022033018/5681320f550346895d98655c/html5/thumbnails/14.jpg)
14
Tunneling Magnetoresistance (TMR)
Conservation of spin during tunneling.
Conductance product of the DOS of two FM electrodes
14
Parallel Anti-Parallel
Weigang Wang