Searched for: collection%3Air
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document
Chiba, Takahiro (author), Takahashi, Saburo (author), Bauer, G.E. (author)
We theoretically study the magnetoresistance (MR) of two-dimensional massless Dirac electrons as found on the surface of three-dimensional topological insulators (TIs) that are capped by a ferromagnetic insulator (FI). We calculate charge and spin transport by Kubo and Boltzmann theories, taking into account the ladder-vertex correction and...
journal article 2017
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Juarez-Acosta, I. (author), Olivares-Robles, M.A. (author), Bosu, S. (author), Sakuraba, Y. (author), Kubota, T. (author), Takahashi, S. (author), Takanashi, K. (author), Bauer, G.E.W. (author)
We model the charge, spin, and heat currents in ferromagnetic metal?normal metal?normal metal trilayer structures in the two current model, taking into account bulk and interface thermoelectric properties as well as Joule heating. The results include the temperature distribution as well as resistance-current curves that reproduce the observed...
journal article 2016
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Schreier, M. (author), Chiba, T. (author), Niedermayr, A. (author), Lotze, J. (author), Huebl, H. (author), Geprags, S. (author), Takahashi, S. (author), Bauer, G.E.W. (author), Gross, R. (author), Goennenwein, S.T.B. (author)
We report the observation of current-induced spin torque resonance in yttrium iron garnet/platinum bilayers. An alternating charge current at GHz frequencies in the platinum gives rise to dc spin pumping and spin Hall magnetoresistance rectification voltages, induced by the Oersted fields of the ac current and the spin Hall effect-mediated spin...
journal article 2015
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Chiba, T. (author), Schreier, M. (author), Bauer, G.E.W. (author), Takahashi, S. (author)
The spin-torque ferromagnetic resonance (ST-FMR) in a bilayer system consisting of a magnetic insulator such as Y3Fe5O12 and a normal metal with spin-orbit interaction such as Pt is addressed theoretically. We model the ST-FMR for all magnetization directions and in the presence of fieldlike spin-orbit torques based on the drift-diffusion spin...
journal article 2015
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Chiba, T. (author), Bauer, G.E.W. (author), Takahashi, S. (author)
We formulate a theory of the ac spin Hall magnetoresistance in a bilayer system consisting of a magnetic insulator such as yttrium iron garnet and a heavy metal such as platinum. We derive expressions for the dc voltage generation based on the drift-diffusion spin model and quantum mechanical boundary condition at the interface that reveal a...
journal article 2014
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Chiba, T. (author), Bauer, G.E.W. (author), Takahashi, S. (author)
We theoretically study the operation of a 4-terminal device consisting of two lateral thin-film spin valves that are coupled by a magnetic insulator such as yttrium iron garnet via the spin transfer torque. By magnetoelectronic circuit theory we calculate the current voltage characteristics and find negative differential resistance and...
journal article 2013
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Nakayama, H. (author), Althammer, M. (author), Chen, Y.T. (author), Uchida, K. (author), Kajiwara, Y. (author), Kikuchi, D. (author), Ohtani, T. (author), Geprägs, S. (author), Opel, M. (author), Takahashi, S. (author), Gross, R. (author), Bauer, G.E.W. (author), Goennenwein, S.T.B. (author), Saitoh, E. (author)
We report anisotropic magnetoresistance in Pt|Y3Fe5O12 bilayers. In spite of Y3Fe5O12 being a very good electrical insulator, the resistance of the Pt layer reflects its magnetization direction. The effect persists even when a Cu layer is inserted between Pt and Y3Fe5O12, excluding the contribution of induced equilibrium magnetization at the...
journal article 2013
document
Chen, Y.T. (author), Takahashi, S. (author), Nakayama, H. (author), Althammer, M. (author), Goennenwein, S.T.B. (author), Saitoh, E. (author), Bauer, G.E.W. (author)
We present a theory of the spin Hall magnetoresistance (SMR) in multilayers made from an insulating ferromagnet F, such as yttrium iron garnet (YIG), and a normal metal N with spin-orbit interactions, such as platinum (Pt). The SMR is induced by the simultaneous action of spin Hall and inverse spin Hall effects and therefore a nonequilibrium...
journal article 2013
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