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Fizika Tverdogo Tela, 2017, Volume 59, Issue 10, Pages 1927–1931
DOI: https://doi.org/10.21883/FTT.2017.10.44960.082 (Mi ftt9423) 		 
Magnetism

Microwave response to the magnetization switching of CoFeB/Ta/CoFeB spin valves and CoFeB films

A. D. Talantsevab, O. V. Koplaka, G. L. L'vovaab, O. S. Dmitrievb, S. Petit Watelotc, Yu. Luc, S. Manginc, R. B. Morgunovb

a Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow region
b Tambov State Technical University
c Institut Jean Lamour, Université de Lorraine, Nancy, France
Full-text PDF (943 kB)
DOI: https://doi.org/10.21883/FTT.2017.10.44960.082
Abstract: Negative magnetoresistance modifying the quality factor of a microwave cavity under the magnetization switching of ferromagnetic layers has been discovered in a MgO/CoFeB/MgO/Ta film with a single ferromagnetic layer and a MgO/CoFeB/Ta/CoFeB/MgO/Ta spin valve consisting of two ferromagnetic CoFeB layers. The dependence of the first derivative dP/dH of the microwave absorption signal on the dc magnetic field of the spectrometer exactly reproduce the magnetic hysteresis loops of the sample. The slope of these dependences and the amplitude of dP/dH jumps under remagnetization of the layers are determined by the interplay of a negative magnetoresistance of individual layers and a positive giant magnetoresistance of the entire multilayer structure. The discovered phenomenon allows using microwave absorption for making a high-sensitivity contact-free indicator of the basic magnetization states of a spin valve.
Received: 16.03.2017
English version:
Physics of the Solid State, 2017, Volume 59, Issue 10, Pages 1947–1951
DOI: https://doi.org/10.1134/S1063783417100328
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: A. D. Talantsev, O. V. Koplak, G. L. L'vova, O. S. Dmitriev, S. Petit Watelot, Yu. Lu, S. Mangin, R. B. Morgunov, “Microwave response to the magnetization switching of CoFeB/Ta/CoFeB spin valves and CoFeB films”, Fizika Tverdogo Tela, 59:10 (2017), 1927–1931; Phys. Solid State, 59:10 (2017), 1947–1951
Citation in format AMSBIB
\Bibitem{TalKopLvo17}
\by A.~D.~Talantsev, O.~V.~Koplak, G.~L.~L'vova, O.~S.~Dmitriev, S.~Petit Watelot, Yu.~Lu, S.~Mangin, R.~B.~Morgunov
\paper Microwave response to the magnetization switching of CoFeB/Ta/CoFeB spin valves and CoFeB films
\jour Fizika Tverdogo Tela
\yr 2017
\vol 59
\issue 10
\pages 1927--1931
\mathnet{http://mi.mathnet.ru/ftt9423}
\crossref{https://doi.org/10.21883/FTT.2017.10.44960.082}
\elib{https://elibrary.ru/item.asp?id=30108721}
\transl
\jour Phys. Solid State
\yr 2017
\vol 59
\issue 10
\pages 1947--1951
\crossref{https://doi.org/10.1134/S1063783417100328}
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