Remote microwave monitoring of magnetization switching in CoFeB/Ta/CoFeB spin logic device

Abstract : Stable magnetic states of the MgO/CoFeB/Ta/CoFeB/MgO/Ta spin valve as well as transitions between the states were detected by microwave magnetoresistance (MMR) measured in the cavity of an electron spin resonance spectrometer. Advantages of this experimental technique are the possibility to study the orientation dependence of the MMR, the absence of the additional contact/sample interfaces, the wireless control of the spin valves, and the compatibility of the MMR measurements with ferromagnetic resonance experiments. The magnetic field dependence of the first derivation of the microwave absorption allows one to judge about the negative magnetoresistance of the layers and positive interlayer giant magnetoresistance. The obtained experimental results could be used for engineering of the microwave high sensitive sensors available for remote identification of the stable magnetic and logic states of the spin valves needful in medical spintronics to detect biological objects labeled with nanoparticles.
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Applied Physics Letters, American Institute of Physics, 2017, 110 (21), pp.212403. 〈10.1063/1.4984091〉
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R Morgunov, G L'Vova, A Talantsev, O Koplak, Sébastien Petit-Watelot, et al.. Remote microwave monitoring of magnetization switching in CoFeB/Ta/CoFeB spin logic device. Applied Physics Letters, American Institute of Physics, 2017, 110 (21), pp.212403. 〈10.1063/1.4984091〉. 〈hal-01654256〉

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