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We demonstrate a spin-wave-based time-multiplexed Ising Machine (SWIM), implemented using a 5 $\mu$m thick Yttrium Iron Garnet (YIG) film and off-the-shelf microwave components. The artificial Ising spins consist of 34--68 ns long 3.125 GHz…

介观与纳米尺度物理 · 物理学 2022-09-12 Artem Litvinenko , Roman Khymyn , Victor H. González , Ahmad A. Awad , Vasyl Tyberkevych , Andrei Slavin , Johan Åkerman

We report the fabrication and optical characterization of an air-suspended photonic crystal nanobeam cavity in yttrium-iron-garnet (YIG) realized by focused-ion-beam milling. YIG's combination of low optical loss and ferrimagnetism makes it…

We report a tunable spin mixing conductance, up to $\pm 22\%$, in a Y${}_{3}$Fe${}_{5}$O${}_{12}$/Platinum (YIG/Pt) bilayer.This control is achieved by applying a gate voltage with an ionic gate technique, which exhibits a gate-dependent…

介观与纳米尺度物理 · 物理学 2019-04-24 Ledong Wang , Zhijian Lu , Jianshu Xue , Peng Shi , Yufeng Tian , Yanxue Chen , Shishen Yan , Lihui Bai , Michael Harder

Motivated by recent experiments on thin films of the ferromagnetic insulator yttrium-iron garnet (YIG), we have developed an efficient microscopic approach to calculate the spin-wave spectra of these systems. We model the experimentally…

材料科学 · 物理学 2009-10-01 Andreas Kreisel , Francesca Sauli , Lorenz Bartosch , Peter Kopietz

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 nonlocally as well, viz. in terms of the voltage in a second…

介观与纳米尺度物理 · 物理学 2017-10-04 L. J. Cornelissen , K. Oyanagi , T. Kikkawa , Z. Qiu , T. Kuschel , G. E. W. Bauer , B. J. van Wees , E. Saitoh

The linear and nonlinear interactions between spin waves (magnons) and acoustic waves (phonons) in magnetostrictive materials provide an exciting opportunity for realizing novel microwave signal processing devices and spintronic circuits.…

介观与纳米尺度物理 · 物理学 2017-02-21 Pratim Chowdhury , Albrecht Jander , Pallavi Dhagat

Spin Seebeck effect (SSE) holds promise for new spintronic devices with low-energy consumption. The underlying physics, essential for a further progress, is yet to be fully clarified. This study of the time resolved longitudinal SSE in the…

材料科学 · 物理学 2015-10-28 S. R. Etesami , L. Chotorlishvili , J. Berakdar

In a bilayer of ferromagnetic and non-magnetic metal, spin pumping can be generated by a thermal gradient. The spin current generation depends on the spin mixing conductance of the interface and the magnetic properties of the ferromagnetic…

介观与纳米尺度物理 · 物理学 2022-03-23 Adam B. Cahaya

In this Letter, we present the results of transient thermopower experiments, performed at room temperature on yttrium iron garnet/platinum bilayers. Upon application of a time-varying thermal gradient, we observe a characteristic low-pass…

For applications making use of magnonic spin currents damping effects, which decrease the spin conductivity, have to be minimized. We here investigate the magnon transport in an yttrium iron garnet thin film with strongly reduced effective…

介观与纳米尺度物理 · 物理学 2021-12-08 Janine Gückelhorn , Tobias Wimmer , Manuel Müller , Stephan Geprägs , Hans Hübl , Rudolf Gross , Matthias Althammer

Lateral thermal gradient of an yttrium iron garnet (YIG) film under the microwave application in the cavity of the electron spin resonance system (ESR) was measured at room temperature by fabricating a Cu/Sb thermocouple onto it. To date,…

材料科学 · 物理学 2018-10-24 Ei Shigematsu , Yuichiro Ando , Sergey Dushenko , Teruya Shinjo , Masashi Shiraishi

The temperature dependent longitudinal spin Seebeck effect (SSE) in heavy metal (HM)/ Y3Fe5O12 (YIG) bilayers is investigated as a function of different magnetic field strength, different HM detection material, and YIG thickness ranging…

材料科学 · 物理学 2016-08-03 Er-Jia Guo , Andreas Kehlberger , Joel Cramer , Gerhard Jakob , Mathias Kläui

We report the continuous tuning of magnetic anisotropy in perpendicularly magnetized bismuth-substituted yttrium iron garnet (Bi-YIG) films via He$^+$ ion irradiation. Our findings indicate that the magnetization direction of epitaxial…

We present an experimental study of spin-wave excitation and propagation in microstructured waveguides patterned from a 100 nm thick yttrium iron garnet (YIG)/platinum (Pt) bilayer. The life time of the spin waves is found to be more than…

介观与纳米尺度物理 · 物理学 2015-03-06 P. Pirro , T. Brächer , A. Chumak , B. Lägel , C. Dubs , O. Surzhenko , P. Görnet , B. Leven , B. Hillebrands

This review presents a comprehensive study of the spatial dispersion of propagating magnons electrically emitted in extended yttrium-iron garnet (YIG) films by the spin transfer effects across a YIG$\vert$Pt interface. Our goal is to…

Yttrium iron garnet (YIG) magnonics has garnered significant research interest because of the unique properties of magnons (quasiparticles of collective spin excitation) for signal processing. In particular, hybrid systems based on YIG…

介观与纳米尺度物理 · 物理学 2024-12-20 Jing Xu , Connor Horn , Yu Jiang , Amin Pishehvar , Xinhao Li , Daniel Rosenmann , Xu Han , Miguel Levy , Supratik Guha , Xufeng Zhang

We theoretically explore the generation of spin current driven by a temperature gradient in a junction between a chiral insulator and a normal metal. Based on the gyromagnetic response induced by microscopic acoustic-phonon-mediated lattice…

介观与纳米尺度物理 · 物理学 2025-08-20 Naoki Nishimura , Takumi Funato , Mamoru Matsuo , Takeo Kato

Spin pumping has significant implications for spintronics, providing a mechanism to manipulate and transport spins for information processing. Understanding and harnessing spin currents through spin pumping is critical for the development…

Single-crystal europium iron garnet (EuIG) thin films epitaxially strain-grown on gadolinium gallium garnet (GGG)(100) substrates using off-axis sputtering have strain-induced perpendicular magnetic anisotropy (PMA). By varying the…

The conductance mismatch problem limits the spin-injection efficiency significantly, and spin-injection into graphene has been usually requiring high-quality tunnel barriers to circumvent the conductance mismatch. We introduce a novel…

介观与纳米尺度物理 · 物理学 2015-06-12 Zhenyao Tang1 , Eiji Shikoh1 , Hiroki Ago2 , Kenji Kawahara2 , Yuichiro Ando1 , Teruya Shinjo1 , Masashi Shiraishi1