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Qin, Z. (author), Shen, Zhan (author), Blaabjerg, Frede (author), Bauer, P. (author)
In dual active bridge (DAB) converters, there can be transformer current ringing, especially when the transformer turns ratio is high. It is induced by high dv/dt generated by fast switching as well as the low impedance of the magnetic tank at the high-frequency range. To quantify the influence of the magnetic tank, its impedance model is...
journal article 2020
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Wang, Hanchen (author), Chen, Jilei (author), Yu, T. (author), Liu, Chuanpu (author), Guo, Chenyang (author), Liu, Song (author), Shen, Ka (author), Jia, Hao (author), Bauer, G.E. (author)
Nanomagnets are widely used to store information in non-volatile spintronic devices. Spin waves can transfer information with low-power consumption as their propagations are independent of charge transport. However, to dynamically couple two distant nanomagnets via spin waves remains a major challenge for magnonics. Here we experimentally...
journal article 2020
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Streib, S.D. (author), Vidal-Silva, Nicolas (author), Shen, Ka (author), Bauer, G.E. (author)
We address the theory of magnon-phonon interactions and compute the corresponding quasiparticle and transport lifetimes in magnetic insulators, with a focus on yttrium iron garnet at intermediate temperatures from anisotropy- and exchange-mediated magnon-phonon interactions, the latter being derived from the volume dependence of the Curie...
journal article 2019
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Chen, Jilei (author), Yu, T. (author), Liu, Chuanpu (author), Liu, Tao (author), Madami, Marco (author), Shen, Ka (author), Zhang, J (author), Blanter, Y.M. (author), Bauer, G.E. (author)
Magnon spintronics is a prosperous field that promises beyond-CMOS technology based on elementary excitations of the magnetic order that act as information carriers for future computational architectures. Unidirectional propagation of spin waves is key to the realization of magnonic logic devices. However, previous efforts to enhance the...
journal article 2019
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Shen, K. (author), Bauer, G.E. (author)
We develop a theory of spin wave dynamics excited by ultrafast focused laser pulses in a magnetic film. We take into account both the volume and surface spin wave modes in the presence of applied, dipolar and magnetic anisotropy fields and include the dependence on laser spot exposure size and magnetic damping. We show that the sound waves...
journal article 2018
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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
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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
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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
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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
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Wang, X.S. (author), Yan, P. (author), Shen, Y.H. (author), Bauer, G.E.W. (author), Wang, X.R. (author)
We theoretically study field-induced domain wall motion in an electrically insulating ferromagnet with hard- and easy-axis anisotropies. Domain walls can propagate along a dissipationless wire through spin wave emission locked into the known soliton velocity at low fields. In the presence of damping, the usual Walker rigid-body propagation mode...
journal article 2012
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