High-frequency signal processing using ferromagnetic metals

Kuanr, Bijoy K.; Harward, Ian; Marvin, D.L.; Fal, T. J.; Camley, R. E.; Mills, D. L.; Celiński, Z.

doi:10.1109/tmag.2005.854725

Cited by 35 publications

(12 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using the law of conservation of power we can find the transmission coefficient. 15 The dotted lines in Fig. 2 show the results of the theoretical calculation for the transmission which are very close to the experimental data.…”

supporting

confidence: 72%

Nonreciprocal microwave devices based on magnetic nanowires

Kuanr

Veerakumar

Mishra

et al. 2009

Applied Physics Letters

Self Cite

109

View full text Add to dashboard Cite

We use magnetic nanowires in an alumina matrix as the active element in microwave nonreciprocal resonance isolators. The design is related to waveguide E-plane isolators but is planar and much smaller than typical waveguide isolators. There is a nonreciprocal attenuation of the wave in forward and reverse directions. The isolation is about 6 dB/cm at 23 GHz. The bandwidth of the device is relatively large (5–7 GHz) in comparison to ferrite-based devices. The central frequency of the device can be tuned with the application of magnetic field.

show abstract

supporting

confidence: 72%

Nonreciprocal microwave devices based on magnetic nanowires

Kuanr

Veerakumar

Mishra

et al. 2009

Applied Physics Letters

Self Cite

109

View full text Add to dashboard Cite

show abstract

“…Among these methods are frequency domain transmittance and reflectance measurements using a vector network analyzer (VNA) or time domain pulsed measurements using high-speed oscilloscopes. [1][2][3][4][5][6][7][8][9][10][11] Measuring susceptibility for low moment magnetic thin film materials, however, has historically been very challenging due to the very weak magnetic moment responses for both frequency and time domain measurement techniques. For magnetic materials with large magnetic loss tangents it is necessary to have a high signal-to-noise-ratio (SNR) for magnetic material susceptibility and resonance linewidth characterizations.…”

mentioning

confidence: 99%

A new highly sensitive broadband ferromagnetic resonance measurement system with lock-in detection

Beguhn

Zhou

Rand

et al. 2012

Journal of Applied Physics

View full text Add to dashboard Cite

RF/microwave magnetic measurement systems can be categorized into broadband or narrowband systems. Narrowband systems utilize high Q cavities for magnetic material characterizations such as electron paramagnetic resonance or electron spin resonance. Example broadband characterization systems are permeameters or pulsed inductive magnetometers. Narrowband measurement systems have high sensitivity but limited bandwidth whereas broadband systems suffer from lower sensitivity. In particular, it has been challenging to precisely measure weak magnetization, high anisotropy and high ferromagnetic resonance linewidth across a broad bandwidth. In this work, we report a new highly sensitive broadband resonance measurement system with lock-in detection utilizing a broadband transmission line. The frequency of the RF source is swept while the magnetic field is fixed. The resulting curve of dP/dH versus f is similar to the dP/dH versus H curve from conventional narrowband magnetic measurement system. The imaginary component of magnetic susceptibility χ" is calculated by the equation of χ"(f)=C∫(dP/dH*dH/df)df, in which C is a constant and dH/df is determined from the Kittel equation for magnetic films. Broadband measurements of sputtered low-moment lossy NiCr (4πMs=1100 G) as well as NiFe (4πMs=11000 G) were taken and compared with conventional broadband measurement using a network analyzer.

show abstract

“…However, low magnetization saturation of YIG limits the frequency range for which this material can be used. Ferromagnetic metals, such as Permalloy (Ni 81 Fe 19 ), CoFe, Co 90 Ta 5 Zr 5 offer about one order of magnitude higher saturation magnetization supporting spin wave modes at much higher frequencies than in YIG [38]. Both shape and crystalline anisotropy can be used to defi ne the magnetization orientation at zero magnetic fi elds.…”

Section: Introduction On Spin Wavesmentioning

confidence: 99%

Magnonic Logic Devices

Khitun¹,

Kozhanov²

2017

View full text Add to dashboard Cite

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...

show abstract

High-frequency signal processing using ferromagnetic metals

Cited by 35 publications

References 20 publications

Nonreciprocal microwave devices based on magnetic nanowires

Nonreciprocal microwave devices based on magnetic nanowires

A new highly sensitive broadband ferromagnetic resonance measurement system with lock-in detection

Magnonic Logic Devices

Contact Info

Product

Resources

About