Controlling the canted state in antiferromagnetically coupled magnetic bilayers close to the spin reorientation transition
Applied Physics Letters
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Ummelen, F., Fernández-Pacheco, A., Mansell, R., Petit, D., Swagten, H., & Cowburn, R. (2017). Controlling the canted state in antiferromagnetically coupled magnetic bilayers close to the spin reorientation transition. Applied Physics Letters, 110 (10. 102405)https://doi.org/10.1063/1.4978430
Canted magnetization is obtained in ultrathin, antiferromagnetically coupled magnetic bilayers with thicknesses around the spin reorientation transition. The canting angle is controlled by both the magnetic layer thickness and interlayer coupling strength, which are tuned independently. Hysteresis loops are obtained, where magnetization components parallel and transverse to the applied field are measured, and analyzed by comparison to micromagnetic simulations. This enables the canting angle to be extracted and the behavior of the individual layers to be distinguished. Two types of canted systems are obtained with either single-layer reversal or complex, coupled two-layer reversal, under moderate external magnetic fields. Controlling the magnetization canting and reversal behavior of ultra-thin layers is relevant for the development of magnetoresistive random-access memory and spin-torque oscillator devices.
This research was funded by the FP7 ERC 3SPIN Advanced Grant and by a European Erasmus Mobility program. This work is part of the research programme of the Foundation for Fundamental Research on Matter (FOM), which is part of the Netherlands Organisation for Scientific Research (NWO). A. Fernández-Pacheco acknowledges support from an EPSRC Early Career Fellowship EP/M008517/1, and from the Winton Foundation.
European Research Council (247368)
External DOI: https://doi.org/10.1063/1.4978430
This record's URL: https://www.repository.cam.ac.uk/handle/1810/263243
Attribution 4.0 International
Licence URL: http://creativecommons.org/licenses/by/4.0/