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Title: Exchange coupling and its applications in magnetic data storage
Authors: Li, K.
Wu, Y. 
Guo, Z.
Zheng, Y.
Han, G.
Qiu, J.
Luo, P.
An, L.
Zhou, T.
Keywords: Current-Perpendicular-to-the-Plane (CPP)
Exchange Bias
Giant Magnetoresistive
Interlayer Exchange Coupling
Magnetic Media
Magnetic Read Head
Patterned Media
Perpendicular Media
Spin Valves
Tunnel Magnetoresistance
Issue Date: Jan-2007
Citation: Li, K.,Wu, Y.,Guo, Z.,Zheng, Y.,Han, G.,Qiu, J.,Luo, P.,An, L.,Zhou, T. (2007-01). Exchange coupling and its applications in magnetic data storage. Journal of Nanoscience and Nanotechnology 7 (1) : 13-45. ScholarBank@NUS Repository.
Abstract: The continuing scaling of magnetic recording is facing more and more scientific and technological challenges because both the read sensor and recording bit are approaching sub-50 nm regime with the ever increasing areal density in hard disk drives. One of the key and indispensable elements for both high-sensitivity sensors and high-density media is the exchange bias between a ferromagnetic and an antiferromagnetic layer or the exchange coupling between two ferromagnets via a non-magnetic spacer. In the nanometer regime, the exchange coupling between ferromagnet and antiferromagnet or two ferromagnets through a conductive spacer is governed by the intergrain exchange interaction which has its origin in electron spins. Interlayer exchange coupling in multilayer or trilayer essentially originates from the quantum confinement effect. In this paper, we first review the physical origin and various theoretical models of the two types of exchange couplings, followed by a review of the applications of the exchange bias and interlayer exchange coupling in data storage with emphasis on the advanced read sensor and advanced media including perpendicular media and patterned media. Copyright © 2007 American Scientific Publishers All rights reserved.
Source Title: Journal of Nanoscience and Nanotechnology
ISSN: 15334880
Appears in Collections:Staff Publications

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