Details

Autor(en) / Beteiligte

• Newhouse-Illige, T.
• Liu, Yaohua
• Xu, M.
• Reifsnyder Hickey, D.
• Kundu, A.
• Almasi, H.
• Bi, Chong
• Wang, X.
• Freeland, J. W.
• Keavney, D. J.
• Sun, C. J.
• Xu, Y. H.
• Rosales, M.
• Cheng, X. M.
• Zhang, Shufeng
• Mkhoyan, K. A.
• Wang, W. G.

Titel

Voltage-controlled interlayer coupling in perpendicularly magnetized magnetic tunnel junctions

Ist Teil von

• Nature communications, 2017-05, Vol.8 (1), p.15232-15232, Article 15232

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Magnetic interlayer coupling is one of the central phenomena in spintronics. It has been predicted that the sign of interlayer coupling can be manipulated by electric fields, instead of electric currents, thereby offering a promising low energy magnetization switching mechanism. Here we present the experimental demonstration of voltage-controlled interlayer coupling in a new perpendicular magnetic tunnel junction system with a GdO x tunnel barrier, where a large perpendicular magnetic anisotropy and a sizable tunnelling magnetoresistance have been achieved at room temperature. Owing to the interfacial nature of the magnetism, the ability to move oxygen vacancies within the barrier, and a large proximity-induced magnetization of GdO x , both the magnitude and the sign of the interlayer coupling in these junctions can be directly controlled by voltage. These results pave a new path towards achieving energy-efficient magnetization switching by controlling interlayer coupling. Exploring electric field controlled magnetism enables high efficiency and low energy consumption spintronic devices. Here, by manipulating oxygen vacancies and magnetic moment, the authors achieve voltage control of magnetic interlayer coupling in GdO x based magnetic tunnel junctions.