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We studied the transient behavior of the spin current generated by the longitudinal spin Seebeck effect (LSSE) in a set of platinum-coated yttrium iron garnet (YIG) films of different thicknesses. The LSSE was induced by means of pulsed…

We study the problem of magnetization and heat currents and their associated thermodynamic forces in a magnetic system by focusing on the magnetization transport in ferromagnetic insulators like YIG. The resulting theory is applied to the…

We study magnon spectra at finite temperature in yttrium iron garnet from tight-binding model with nearest neighboring exchange interaction. The spin reduction due to thermal magnon excitation are taken into account via the mean field…

Mesoscale and Nanoscale Physics · Physics 2018-05-09 Ka Shen

The longitudinal spin Seebeck effect (LSSE) in Pt/Y$_3$Fe$_5$O$_{12}$ (YIG) junction systems has been investigated at various magnetic fields and temperatures. We found that the LSSE voltage in a Pt/YIG-slab system is suppressed by applying…

Materials Science · Physics 2015-08-19 Takashi Kikkawa , Ken-ichi Uchida , Shunsuke Daimon , Zhiyong Qiu , Yuki Shiomi , Eiji Saitoh

The effective field torque of an yttrium-iron-garnet film on the spin accumulation in an attached Pt film is measured by the spin-Hall magnetoresistance (SMR). As a result, the magnetization direction of a ferromagnetic insulating layer can…

Mesoscale and Nanoscale Physics · Physics 2014-10-03 N. Vlietstra , J. Shan , V. Castel , J. Ben Youssef , G. E. W. Bauer , B. J. van Wees

Temperature-dependent spin-Seebeck effect data on Pt|YIG (Y$_3$Fe$_5$O$_{12}$)|GGG (Gd$_3$Ga$_5$O$_{12}$) are reported for YIG films of various thicknesses. The effect is reported as a spin-Seebeck resistivity (SSR), the inverse spin-Hall…

The impact of the longitudinal spin Seebeck effect (LSSE) on the magnon damping in magnetic-insulator/nonmagnetic-metal bilayers was recently discussed in several reports. However, results of those experiments can be blurred by multimode…

Mesoscale and Nanoscale Physics · Physics 2017-05-03 Thomas Langner , Akihiro Kirihara , Alexander A. Serga , Burkard Hillebrands , Vitaliy I. Vasyuchka

The field of magnonics attracts significant attention due to the possibility of utilizing information coded into the spin-wave phase or amplitude to perform computation operations on the nanoscale. Recently, spin waves were investigated in…

Spin waves are investigated in Yttrium Iron Garnet (YIG) waveguides with a thickness of 39 nm and widths ranging down to 50 nm, i.e., with aspect ratios thickness over width approaching unity, using Brillouin Light Scattering spectroscopy.…

Mesoscale and Nanoscale Physics · Physics 2019-06-26 Q. Wang , B. Heinz , R. Verba , M. Kewenig , P. Pirro , M. Schneider , T. Meyer , B. Lägel , C. Dubs , T. Brächer , A. V. Chumak

Spin-phonon interaction is an important channel for spin and energy relaxation in magnetic insulators. Understanding this interaction is critical for developing magnetic insulator-based spintronic devices. Quantifying this interaction in…

We present a comprehensive investigation of propagating spin waves in nanometer-thick yttrium iron garnet (YIG) films. We use broadband spin-wave spectroscopy with integrated coplanar waveguides (CPWs) and microstrip antennas on top of…

Mesoscale and Nanoscale Physics · Physics 2019-01-02 Huajun Qin , Sampo J. Hämäläinen , Kristian Arjas , Jorn Witteveen , Sebastiaan van Dijken

Recent demonstration of efficient transport and manipulation of spin information by magnon currents have opened exciting prospects for processing information in devices. Magnon currents can be driven both electrically and thermally, even in…

Mesoscale and Nanoscale Physics · Physics 2020-05-26 Juan M. Gomez-Perez , Saül Vélez , Luis E. Hueso , Fèlix Casanova

Spin currents are generated within the bulk of magnetic materials due to heat flow, an effect called intrinsic spin-Seebeck. This bulk bosonic spin current consists of a diffusing thermal magnon cloud, parametrized by the magnon chemical…

Yttrium iron garnet (YIG) is a ferrimagnetic insulator valued for its high Curie temperature, very low magnetic damping, and ability to support long-range spin-wave transport. These qualities have established it as a cornerstone material in…

The features of phonon-magnon interconversion in acoustic resonator determine the efficiency of spin pumping from YIG into Pt that may be detected electrically through the inverse spin Hall effect (ISHE). Based on the methods developed in…

Mesoscale and Nanoscale Physics · Physics 2020-01-16 S. G. Alekseev , N. I. Polzikova , A. O. Raevskiy

The magnetic insulator Yttrium Iron Garnet can be grown with exceptional quality, has a ferrimagnetic transition temperature of nearly 600 K, and is used in microwave and spintronic devices that can operate at room temperature. The most…

Strongly Correlated Electrons · Physics 2018-02-15 A. J. Princep , R. A. Ewings , S. Ward , S. Tóth , C. Dubs , D. Prabhakaran , A. T. Boothroyd

This article reports temperature-dependent measurements of longitudinal spin Seebeck effects (LSSEs) in Pt/Y$_3$Fe$_5$O$_{12}$ (YIG)/Pt systems in a high temperature range from room temperature to above the Curie temperature of YIG. The…

Materials Science · Physics 2015-05-28 Ken-ichi Uchida , Takashi Kikkawa , Asuka Miura , Junichiro Shiomi , Eiji Saitoh

Ferromagnetic metals and insulators are widely used for generation, control and detection of magnon spin signals. Most magnonic structures are based primarily on either magnetic insulators or ferromagnetic metals, while heterostructures…

Spin-wave propagation in an assembly of microfabricated 20 nm thick, 2.5 {\mu}m wide Yttrium Iron Garnet (YIG) waveguides is studied using propagating spin-wave spectroscopy (PSWS) and phase resolved micro-focused Brillouin Light Scattering…

Mesoscale and Nanoscale Physics · Physics 2017-04-05 M. Collet , O. Gladii , M. Evelt , V. Bessonov , L. Soumah , P. Bortolotti , S. O Demokritov , Y. Henry , V. Cros , M. Bailleul , V. E. Demidov , A. Anane

The nonlocal transport of thermally generated magnons not only unveils the underlying mechanism of the spin Seebeck effect, but also allows for the extraction of the magnon relaxation length ($\lambda_m$) in a magnetic material, the average…

Materials Science · Physics 2017-11-29 J. Shan , L. J. Cornelissen , J. Liu , J. Ben Youssef , L. Liang , B. J. van Wees