Thermal Stability of Synthetic Antiferromagnet and Hard Magnet Coupled Spin Valves

Show simple item record Tadisinia, Zeenath R. Gupta, Subhadra LeClair, Patrick Mewes, Tim 2018-08-29T20:21:45Z 2018-08-29T20:21:45Z 2008
dc.identifier.citation Tadisinia, Z., Gupta, S., LeClair, P., Mewes, T. (2008): Detection of Higher Order Modulation Harmonics in Magnetic Resonance Force Microscopy, Journal of Vacuum Science & Technology A, 26(4). en_US
dc.description.abstract The magnetic properties of current-in-plane (CIP) giant magnetoresistive (GMR) spin valves employing synthetic antiferromagnet (SAF) pinning have been investigated. The conventional spin valve structure, with a ferromagnetic (FM) layer pinned by an antiferromagnet (AFM) layer, exhibits high electrical resistance, the AFM typically being a high resistivity material. We have investigated pinning with a Co/Ru/Co SAF trilayer only, with no additional AFM pinning. We have also investigated spin valves employing a hard magnet layer in three different configurations as the pinning/pinned layer. Elimination of the AFM-induced parasitic resistance has the potential for yielding a higher GMR ratio in current-perpendicular-to-the-plane (CPP) structures. The full-film properties have been optimized by using vibrating sample magnetometry and CIP magnetotransport measurements. The thermal stability of SAF-pinned spin valves and hard magnet-pinned spin valves has been characterized through magnetotransport measurements of up to 400 K, and found to have measurable MR even at that temperature. A study of the M-H loops for the SAF spin valve showed no change up to 500 K. Therefore, these non-AFM-containing spin valves appear to be usable in CPP devices under practical head operating temperatures, representing a significant advance in reduced stack resistance, increased MR ratio, and reduced coupling between free and pinned layers in a small-dimensional patterned structure. en_US
dc.format.mimetype application/pdf en_US
dc.subject Ferromagnetism en_US
dc.subject Electrical resistivity en_US
dc.subject Copper en_US
dc.subject Vibration testing en_US
dc.subject Tantalum en_US
dc.subject Ferromagnetic materials en_US
dc.subject Magnetoresistance en_US
dc.subject Thermal stability en_US
dc.subject Antiferromagnetism en_US
dc.subject Spin valves en_US
dc.title Thermal Stability of Synthetic Antiferromagnet and Hard Magnet Coupled Spin Valves en_US
dc.type text en_US

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