- document
-
Hashimoto, Yusuke (author), Daimon, Shunsuke (author), Iguchi, Ryo (author), Oikawa, Yasuyuki (author), Shen, K. (author), Sato, Koji (author), Bossini, Davide (author), Tabuchi, Yutaka (author), Satoh, Takuya (author), Hillebrands, Burkard (author), Bauer, G.E. (author), Johansen, Tom H. (author), Kirilyuk, Andrei (author), Rasing, Theo (author), Saitoh, Eiji (author)To know the properties of a particle or a wave, one should measure how its energy changes with its momentum. The relation between them is called the dispersion relation, which encodes essential information of the kinetics. In a magnet, the wave motion of atomic spins serves as an elementary excitation, called a spin wave, and behaves like a...journal article 2017
- document
-
Flebus, Benedetta (author), Shen, K. (author), Kikkawa, Takashi (author), Uchida, Ken Ichi (author), Qiu, Zhiyong (author), Saitoh, Eiji (author), Duine, Rembert A. (author), Bauer, G.E. (author)We theoretically study the effects of strong magnetoelastic coupling on the transport properties of magnetic insulators. We develop a Boltzmann transport theory for the mixed magnon-phonon modes ("magnon polarons") and determine transport coefficients and the spin diffusion length. Magnon-polaron formation causes anomalous features in the...journal article 2017
- document
-
Kikkawa, Takashi (author), Shen, K. (author), Flebus, Benedetta (author), Duine, Rembert A. (author), Uchida, Ken Ichi (author), Qiu, Zhiyong (author), Bauer, G.E. (author), Saitoh, Eiji (author)Sharp structures in the magnetic field-dependent spin Seebeck effect (SSE) voltages of Pt/Y3Fe5O12 at low temperatures are attributed to the magnon-phonon interaction. Experimental results are well reproduced by a Boltzmann theory that includes magnetoelastic coupling. The SSE anomalies coincide with magnetic fields tuned to the threshold of...journal article 2016
- document
-
Althammer, M. (author), Meyer, S. (author), Nakayama, H. (author), Schreier, M. (author), Altmannshofer, S. (author), Weiler, M. (author), Huebl, H. (author), Gesprägs, S. (author), Opel, M. (author), Gross, R. (author), Meier, D. (author), Klewe, C. (author), Kuschel, T. (author), Schmalhorst, J.M. (author), Reiss, G. (author), Shen, L. (author), Gupta, A. (author), Chen, Y.T. (author), Bauer, G.E.W. (author), Saitoh, E. (author), Goennenwein, S.T.B. (author)We experimentally investigate and quantitatively analyze the spin Hall magnetoresistance effect in ferromagnetic insulator/platinum and ferromagnetic insulator/nonferromagnetic metal/platinum hybrid structures. For the ferromagnetic insulator, we use either yttrium iron garnet, nickel ferrite, or magnetite and for the nonferromagnet, copper or...journal article 2013