Electric-field-induced spin wave generation using multiferroic magnetoelectric cells

Cherepov, Sergiy; Amiri, Pedram Khalili; Alzate, Juan G.; Wong, Kin; Lewis, Meredith; Upadhyaya, Pramey; Nath, Jayshankar; Bao, Ming; Bur, Alexandre; Wu, Tao; Carman, Gregory P.; Khitun, Alexander; Wang, Kang L.

doi:10.1063/1.4865916

Cited by 173 publications

(119 citation statements)

References 39 publications

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“…[1][2][3][4][5][6][7][8][9][10][11] In particular, much attention is given to acoustically driven (AD) excitation of magnetic oscillations in artificial multiferroic structures due to strain mediated coupling between the microwave electric field in a piezoelectric layer and magnetization in a ferromagnetic layer. [6][7][8][9][10][11] In the field of microwave spintronics, acoustic spin pumping (ASP) is the generation of spinpolarized electron currents in normal metal from AD magnetization precession in an attached magnetic material. [12][13][14] In ferrimagnetic insulator yttrium iron garnet (YIG)/paramagnetic metal (platinum, Pt) bilayers, a pure spin current generation not accompanied by charge current was discovered and then investigated in numerous works.…”

Section: Introductionmentioning

confidence: 99%

Frequency and magnetic field mapping of magnetoelastic spin pumping in high overtone bulk acoustic wave resonator

et al. 2018

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We report on the first observation of microvolt-scale inverse spin Hall effect (ISHE) dc voltage driven by an acoustic spin pumping (ASP) in a bulk acoustic wave (BAW) resonator formed by a Al-ZnO-Al-YIG(1)-GGG-YIG(2)-Pt structure. When 2 mW power is applied to an Al-ZnO-Al transducer, the voltage VISHE ∼ 4 μV in the Pt film is observed as a result of resonant ASP from YIG(2) to Pt in the area ∼ 170 μm. The results of frequency and magnetic field mapping of VISHE(f,H) together with reflectivity of the resonator show an obvious agreement between the positions of the voltage maxima and BAW resonance frequencies fn(H) on the (f, H) plane. At the same time a significant asymmetry of the VISHE(fn(H)) value in reference to the magnetoelastic resonance (MER) line fMER(H) position is revealed, which is explained by asymmetry of the magnetoelastic waves dispersion law.

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Section: Introductionmentioning

confidence: 99%

Frequency and magnetic field mapping of magnetoelastic spin pumping in high overtone bulk acoustic wave resonator

et al. 2018

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“…Although the idea of such majority gates was presented earlier, [9,10] no practical realization suitable for the integration into magnonic circuits has thus far been proposed.…”

mentioning

confidence: 99%

Design of a spin-wave majority gate employing mode selection

Klingler

Pirro

Brächer

et al. 2014

Applied Physics Letters

173

142

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The design of a microstructured, fully functional spin-wave majority gate is presented and studied using micromagnetic simulations. This all-magnon logic gate consists of three-input waveguides, a spin-wave combiner and an output waveguide. In order to ensure the functionality of the device, the output waveguide is designed to perform spin-wave mode selection. We demonstrate that the gate evaluates the majority of the input signals coded into the spin-wave phase. Moreover, the all-magnon data processing device is used to perform logic AND-, OR-, NAND-and NOR-operations.In spintronics the degree of freedom of the spin is used to transmit information. Spin and, thus, angular momentum cannot only be transmitted by electrons, but also by magnons, the quanta of the dynamic excitations of the magnetic system -spin waves. It is possible to encode information in the phase or amplitude of such spin waves and to have it transmitted through spin-wave waveguides. Moreover, the wave properties allow for efficient data processing through the exploitation of the interference between spin waves.[1-8] An important step towards the application of spin-wave devices in modern information technology is the realization of spin-wave logic gates. In this context, the majority gate is of special interest since it allows for the evaluation of the majority of an odd number of input signals, as given in Tab. I. Furthermore, not only can majority operations be performed with this gate but also AND-or OR-operations, if one input (see input 3 in Tab. I) is used as a control input. Hence, the advantage of the majority gate is its configurability and functionality.[9] In a spin-wave majority gate the phase φ of the waves is used as an information carrier (φ 0 corresponds to logic "0", logic "1" is represented by φ 0 + π). Although the idea of such majority gates was presented earlier, [9,10] no practical realization suitable for the integration into magnonic circuits has thus far been proposed.One of the main problems of a realistic spin-wave majority gate is the coexistence of different spin-wave modes with different wavelengths at a fixed frequency in the structure.[11] As a result, the output signal is given by overlaying waves of various phases and, thus, the majority function is lost. As a solution, a design which guarantees for a single-mode operation has to be used. Here, we present the design of an all-magnon majority gate and prove its functionality using numerical simulations. The width of the output waveguide has been chosen in a way such as to obtain single-mode operation. The operational characteristics of the majority gate have been studied for different phases. AND-, OR-, NAND-and NOR-operations have been demonstrated using the same * Electronic address: klingles@rhrk.uni-kl.de majority gate device.For the simulations, the material parameters of 100 nm-thick Yttrium-Iron-Garnet (

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“…Recently, spin wave excitation and detection by synthetic multiferroic elements has been experimentally demonstrated [16]. The schematics of the experiment and experimental data are shown in Figure 9.…”

Section: Magnonic Logic Devicesmentioning

confidence: 99%

“…We start our consideration with the description of the basic elements requiring for logic circuits construction including spin wave generation, detection, waveguides, waveguide junctions, and phase shifters [14]. There are several physical mechanisms for spin wave generation and detection by using micro-antennas [3,4], spin torque and spin hall oscillators [15], and multiferroic elements [16]. These elements are aimed to convert the input electric signals into spin waves, and vice versa, convert the output spin waves into the electric signals.…”

Section: Introduction On Spin Wavesmentioning

confidence: 99%

Magnonic Logic Devices

Khitun¹,

Kozhanov²

2017

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Хитун Александр Георгиевич, кандидат физико-математических наук, профессор факульте-та электроники и компьютерной техники, Университет Калифорнии, Риверсайд, akhitun@ ece.ucr.edu Кожанов Александр Евгеньевич, кандидат физико-математических наук, доцент факультета физики и астрономии, Университет штата Джорджия, Атланта, akozhanov@gsu.edu Делается обзор работ по исследованиям и разработкам физико-технологической плат-формы создания устройств магнонной логики. Рассматриваются физические принципы построения устройств спиновой логики, методы управления фазой и эффекты интерфе-ренции спиновых волн при распространении в магнитных микроструктурах. Обсужда-ются результаты микромагнитного моделирования и экспериментальных исследований эффектов распространения спиновых волн в микроволноводах на основе ферромагнит-ных металлов и пленок ферритов гранатов. Рассматриваются методы возбуждения и приема спиновых волн в магнитных волноведущих структурах. Определенное внимание уделяется архитектуре и подходам к построению логических устройств на основе интер-ференционных эффектов. Для мультиферроидных структур приводятся оценки энерго-эффективности переключения устройств магнонной логики между состояниями логи-ческий «0» и «1». Показана возможность построения основных логических элементов и функций на принципах магнонной логики. Проводится сравнение магнонных логических устройств с устройствами по стандартной КМОП-технологии. Обсуждаются возможные области применения устройств магнонной логики. Ключевые слова: магноника, спиновые волны, тонкие магнитные пленки, мульти-ферроики, стрейнтроника, магнонные сети и волноведущие структуры, интерференция спиновых волн, управление фазой спиновых волн, магнонная голографическая память. Background and Objectives:There is a big impetus for the development of novel computational devices able to overcome the limits of the traditional transistor-based circuits. The utilization of phase in addition to amplitude is one of the promising approaches towards more functional computing architectures. In this work, we present an overview on magnonic logic devices utilizing spin waves for information transfer and processing. Materials and Methods: Magnonic logic devices combine input/output elements for spin wave generation/detection and 217 Твердотельная электроника, микро-и наноэлектроника A. Khitun, A. Kozhanov. Magnonic Logic Devices an analog core. The core consists of magnetic waveguides serving as a spin wave buses. The data transmission and processing within the analog part is accomplished by the spin waves, where logic 0 and 1 are encoded into the phase of the propagating wave. The latter makes it possible to utilize spin wave interference for logic functionality. The proof-of-concept experiments were accomplished on micrometer scale ferromagnetic Ni 81 Fe 19 and ferrite Y 3 Fe 2 (FeO 4 ) 3 structures. Results: We present experimental data on spin wave propagation and interference in magnetic microstructures. We also present experimental data showing parallel read-out of magnetic bits using spin...

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Electric-field-induced spin wave generation using multiferroic magnetoelectric cells

Cited by 173 publications

References 39 publications

Frequency and magnetic field mapping of magnetoelastic spin pumping in high overtone bulk acoustic wave resonator

Frequency and magnetic field mapping of magnetoelastic spin pumping in high overtone bulk acoustic wave resonator

Design of a spin-wave majority gate employing mode selection

Magnonic Logic Devices

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