475 citations · 3.3k across the 51 of their papers we have counts for
15 papers · 1 filter
Magnetoelastic coupling in stripe-domain states of yttrium iron garnet
Nimisha Arora, Daniel Prestwood, Takashi Kikkawa +4
We study magnetoelastic coupling in stripe-domain magnetic states of -thick YIG thin films grown on a GGG substrate. Broadband ferromagnetic resonance reveals low-f…
Observing Differential Spin Currents by Resonant Inelastic X-ray Scattering
Yanhong Gu, Joseph Barker, Jiemin Li +12
Controlling spin currents, i.e., the flow of spin angular momentum, in small magnetic devices is the principal objective of spin electronics, a main contender for future energy eff…
Separating terahertz spin and charge contributions from ultrathin antiferromagnetic heterostructures
Thomas W. J. Metzger, Peter Fischer, Takashi Kikkawa +3
Femtosecond laser excitation of nanometer thin heterostructures comprising a heavy metal and a magnetically ordered material is known to result in the emission of terahertz radiati…
Negative longitudinal resistance of monolayer graphene in the quantum Hall regime
Alexey A. Kaverzin, Shunsuke Daimon, Takashi Kikkawa +2
In the quantum Hall regime the charge current is carried by ideal one-dimensional edge channels where the backscattering is prohibited by topology. This results in the constant pot…
Mechanism of paramagnetic spin Seebeck effect
Koichi Oyanagi, Saburo Takahashi, Takashi Kikkawa +1
We have theoretically investigated the spin Seebeck effect (SSE) in a normal metal (NM)/paramagnetic insulator (PI) bilayer system. Through a linear response approach, we calculate…
Deciphering quantum fingerprints in electric conductance
Shunsuke Daimon, Kakeru Tsunekawa, Shinji Kawakami +5
When the electric conductance of a nano-sized metal is measured at low temperatures, it often exhibits complex but reproducible patterns as a function of external magnetic fields,…
Emission of coherent THz magnons in an antiferromagnetic insulator triggered by ultrafast spin-phonon interactions
E. Rongione, O. Gueckstock, M. Mattern +17
Antiferromagnetic materials have been proposed as new types of narrowband THz spintronic devices owing to their ultrafast spin dynamics. Manipulating coherently their spin dynamics…
Modulation of Spin Seebeck Effect by Hydrogenation
K. Ogata, T. Kikkawa, E. Saitoh +1
We demonstrate the modulation of spin Seebeck effect (SSE) by hydrogenation in Pd/YIG bilayers. In the presence of 3% hydrogen gas, SSE voltage decreases by more than 50% from the…
Nonlinear magnon polaritons
Oscar Lee, Kei Yamamoto, Maki Umeda +6
We experimentally and theoretically demonstrate that nonlinear spin-wave interactions suppress the hybrid magnon-photon quasiparticle or "magnon polariton" in microwave spectra of…
Observation of quantum interference conductance fluctuations in metal rings with strong spin-orbit coupling
R. Ramos, T. Makiuchi, T. Kikkawa +3
We investigated the magnetotransport properties of mesoscopic platinum nanostructures (wires and rings) with sub-100 nm lateral dimensions at very low temperatures. Despite the str…
Spincaloritronic measurements: a round robin comparison of the longitudinal spin Seebeck effect
A. Sola, V. Basso, M. Kuepferling +16
The rising field of spin caloritronics focuses on the interactions between spin and heat currents in a magnetic material; the observation of the spin Seebeck effect opened the rout…
Spin-current coherence peak in superconductor/magnet junctions
Maki Umeda, Yuki Shiomi, Takashi Kikkawa +4
Coherence peak effects in a superconductor induced by a thermal spin current are reported. We measured inverse spin Hall effects induced by spin injection from a ferrimagnetic insu…
Nonlocal magnon-polaron transport in yttrium iron garnet
L. J. Cornelissen, K. Oyanagi, T. Kikkawa +5
The spin Seebeck effect (SSE) is observed in magnetic insulator|heavy metal bilayers as an inverse spin Hall effect voltage under a temperature gradient. The SSE can be detected no…
Magnon-polaron transport in magnetic insulators
Benedetta Flebus, Ka Shen, Takashi Kikkawa +5
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 magno…
Spin current generation from sputtered Y3Fe5O12 films
J. Lustikova, Y. Shiomi, Z. Qiu +4
Spin current injection from sputtered yttrium iron garnet (YIG) films into an adjacent platinum layer has been investigated by means of the spin pumping and the spin Seebeck effect…