Failure Analysis in Magnetic Tunnel Junction Nanopillar with Interfacial Perpendicular Magnetic Anisotropy
AbstractMagnetic tunnel junction nanopillar with interfacial perpendicular magnetic anisotropy (PMA-MTJ) becomes a promising candidate to build up spin transfer torque magnetic random access memory (STT-MRAM) for the next generation of non-volatile memory as it features low spin transfer switching current, fast speed, high scalability, and easy integration into conventional complementary metal oxide semiconductor (CMOS) circuits. However, this device suffers from a number of failure issues, such as large process variation and tunneling barrier breakdown. The large process variation is an intrinsic issue for PMA-MTJ as it is based on the interfacial effects between ultra-thin films with few layers of atoms; the tunneling barrier breakdown is due to the requirement of an ultra-thin tunneling barrier (e.g., <1 nm) to reduce the resistance area for the spin transfer torque switching in the nanopillar. These failure issues limit the research and development of STT-MRAM to widely achieve commercial products. In this paper, we give a full analysis of failure mechanisms for PMA-MTJ and present some eventual solutions from device fabrication to system level integration to optimize the failure issues. View Full-Text
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Zhao, W.; Zhao, X.; Zhang, B.; Cao, K.; Wang, L.; Kang, W.; Shi, Q.; Wang, M.; Zhang, Y.; Wang, Y.; Peng, S.; Klein, J.-O.; De Barros Naviner, L.A.; Ravelosona, D. Failure Analysis in Magnetic Tunnel Junction Nanopillar with Interfacial Perpendicular Magnetic Anisotropy. Materials 2016, 9, 41.
Zhao W, Zhao X, Zhang B, Cao K, Wang L, Kang W, Shi Q, Wang M, Zhang Y, Wang Y, Peng S, Klein J-O, De Barros Naviner LA, Ravelosona D. Failure Analysis in Magnetic Tunnel Junction Nanopillar with Interfacial Perpendicular Magnetic Anisotropy. Materials. 2016; 9(1):41.Chicago/Turabian Style
Zhao, Weisheng; Zhao, Xiaoxuan; Zhang, Boyu; Cao, Kaihua; Wang, Lezhi; Kang, Wang; Shi, Qian; Wang, Mengxing; Zhang, Yu; Wang, You; Peng, Shouzhong; Klein, Jacques-Olivier; De Barros Naviner, Lirida A.; Ravelosona, Dafine. 2016. "Failure Analysis in Magnetic Tunnel Junction Nanopillar with Interfacial Perpendicular Magnetic Anisotropy." Materials 9, no. 1: 41.
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