Applied Physics Letters

Néel "orange-peel" coupling in magnetic tunneling junction devices

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We present measurements of the magnitude of Néel "orange-peel" coupling due to interface roughness in a series of magnetic tunneling junction devices. Results from magnetometry and transport measurements are shown to be in good agreement with the theoretical model of Néel. In addition, we have used transmission electron microscopy to directly probe the sample interface roughness and obtain results consistent with the values obtained by magnetometry and transport methods. © 2000 American Institute of Physics.