Magnon detection using a ferroic collinear multilayer spin valve

Joel Cramer, Felix Fuhrmann, Ulrike Ritzmann, Vanessa Gall, Tomohiko Niizeki, Rafael Ramos, Zhiyong Qiu, Dazhi Hou, Takashi Kikkawa, Jairo Sinova, Ulrich Nowak, Eiji Saitoh and Mathias Kläui ()
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Joel Cramer: Johannes Gutenberg-University Mainz
Felix Fuhrmann: Johannes Gutenberg-University Mainz
Ulrike Ritzmann: Johannes Gutenberg-University Mainz
Vanessa Gall: University of Konstanz
Tomohiko Niizeki: Tohoku University
Rafael Ramos: Tohoku University
Zhiyong Qiu: Tohoku University
Dazhi Hou: Tohoku University
Takashi Kikkawa: Tohoku University
Jairo Sinova: Johannes Gutenberg-University Mainz
Ulrich Nowak: University of Konstanz
Eiji Saitoh: Tohoku University
Mathias Kläui: Johannes Gutenberg-University Mainz

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract Information transport and processing by pure magnonic spin currents in insulators is a promising alternative to conventional charge-current-driven spintronic devices. The absence of Joule heating and reduced spin wave damping in insulating ferromagnets have been suggested for implementing efficient logic devices. After the successful demonstration of a majority gate based on the superposition of spin waves, further components are required to perform complex logic operations. Here, we report on magnetization orientation-dependent spin current detection signals in collinear magnetic multilayers inspired by the functionality of a conventional spin valve. In Y3Fe5O12|CoO|Co, we find that the detection amplitude of spin currents emitted by ferromagnetic resonance spin pumping depends on the relative alignment of the Y3Fe5O12 and Co magnetization. This yields a spin valve-like behavior with an amplitude change of 120% in our systems. We demonstrate the reliability of the effect and identify its origin by both temperature-dependent and power-dependent measurements.

Date: 2018
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DOI: 10.1038/s41467-018-03485-5

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