X-ray detected magnetic resonance at the Fe K-edge in YIG: Forced precession of magnetically polarized orbital components

Goulon, J.; Рогалев, А.; Wilhelm, F.; Jaouen, N.; Goulon-Gìnet, C.; Goujon, G.; Youssef, J. Ben; Indenbom, M. V.

doi:10.1134/1.2171722

Cited by 41 publications

(36 citation statements)

References 13 publications

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“…Major opportunities for fundamental studies [193] Other techniques Nuclear resonant scattering Detection Highest spatial resolution currently achievable [194] X-ray-detected ferromagnetic resonance (XFMR) Detection High spatial resolution, access to layer resolution [195][196][197] Electron-magnon scattering approach Detection Suitable for the detection of domain wall position [198,199] and temporal resolution. For spin-wave excitation techniques the efficiency of excitation, its coherency and the wavenumber range are of primary importance [155-157, 159, 160, 163-165, 168-172, 174, 177-189, 191-199].…”

Section: Detectionmentioning

confidence: 99%

Magnonic crystals for data processing

Chumak

Serga

Hillebrands

2017

J. Phys. D: Appl. Phys.

421

320

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IntroductionThis article focuses on a selection of results in the field of magnonic crystals obtained within the last decade in our group. Special attention is devoted to the application of magnonic crystals in data processing and information technologies. Because of the large number of achievements in the field, it is unavoidable that many important results are excluded from this article. Therefore, we would like to direct the reader's attention to excellent reviews devoted to different aspects of magnonic crystals: spin-wave dynamics in periodic structures for microwave applications [1, 2], Brillouin light scattering (BLS) studies of planar metallic magnonic crystals [3], micromagnetic computer simulations of width-modulated waveguides [4], photo-magnonic aspects of antidot lattices studies [5], theoretical studies of one-dimensional monomode waveguides [6], and reconfigurable magnonic crystals [7]. The results presented in the current review were already partially presented in our own reviews of yttrium iron garnet (YIG) magnonics [8] and magnon spintronics [9] as well as in book chapters on dynamic magnonic crystals [10] and magnon spintronics [11].The article is organized in the following way: In the introduction we describe the field of magnon spintronics and discuss the role of magnonic crystals in it. The next section 2 is devoted to the properties of spin waves in thin planar films and waveguides, to the magnetic materials commonly used in the field, and to the methods of spin-wave excitation and detection. Sections 3 and 4 are devoted to the study of physical phenomena taking place in static and dynamic magnonic crystals, respectively. The application of magnonic crystals for magnonbased processing of analog and digital data is discussed in section 5. Specifically, static magnonic crystals can be used as passive elements, like microwave filters, resonators or delay lines for microwave generation. Reconfigurable and dynamic magnonic crystals are promising as active devices performing, for example, tunable filtering, frequency conversion or time reversal. In the final section we briefly summarize the results. Magnon spintronics: from electron-to magnon-based computingA disturbance in the local magnetic order can propagate in a magnetic material in the form of a wave. This wave was first predicted by Bloch in 1929 and was named spin wave since AbstractMagnons (the quanta of spin waves) propagating in magnetic materials with wavelengths at the nanometer-scale and carrying information in the form of an angular momentum can be used as data carriers in next-generation, nano-sized low-loss information processing systems. In this respect, artificial magnetic materials with properties periodically varied in space, known as magnonic crystals, are especially promising for controlling and manipulating magnon currents. In this article, different approaches for the realization of static, reconfigurable, and dynamic magnonic crystals are presented along with a variety of novel wave phenomena discovered in these cryst...

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Section: Detectionmentioning

confidence: 99%

Magnonic crystals for data processing

Chumak

Serga

Hillebrands

2017

J. Phys. D: Appl. Phys.

421

320

View full text Add to dashboard Cite

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“…Previous XFMR studies can be divided into two distinct categories: phase-resolved measurements 1-3 and time-averaged measurements. [4][5][6] Both types of measurements are generally performed in transmission, although an earlier phaseresolved study was performed in reflection at grazing incidence. 7 Transmission measurements are usually limited to samples grown on substrates such as Si 3 N 4 that are transparent in the soft x-ray regime.…”

mentioning

confidence: 99%

Phase-resolved x-ray ferromagnetic resonance measurements in fluorescence yield

Marcham

Keatley

Neudert

et al. 2011

Journal of Applied Physics

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Phase-resolved x-ray ferromagnetic resonance (XFMR) has been measured in fluorescence yield, extending the application of XFMR to opaque samples on opaque substrates. Magnetization dynamics were excited in a Co 50 Fe 50 (0.7)/Ni 90 Fe 10 (5) bilayer by means of a continuous wave microwave excitation, while x-ray magnetic circular dichroism (XMCD) spectra were measured stroboscopically at different points in the precession cycle. By tuning the x-ray energy to the L 3 edges of Ni and Fe, the dependence of the real and imaginary components of the element specific magnetic susceptibility on the strength of an externally applied static bias field was determined. Precessional dynamics are exploited in the operation of high frequency magnetic devices such as magnetic disk drives, nonreciprocal microwave devices, and spin transfer oscillators. The trajectory of precession and its damping are of crucial importance, and x-ray magnetic circular dichroism (XMCD) has the potential to provide new insight. The chemical specificity of XMCD means that it is possible to isolate the precession in different regions of the sample. By measuring the relative amplitude and phase of oscillation at each chemical species and at distinct sites in the crystal structure, one may in principle determine whether the relaxation takes place preferentially at a specific location within the structure.X-ray ferromagnetic resonance (XFMR) combines XMCD and ferromagnetic resonance (FMR) phenomena in a technique capable of measuring the FMR response of an alloy or a multilayer with both chemical and site specificity. Previous XFMR studies can be divided into two distinct categories: phase-resolved measurements 1-3 and time-averaged measurements.4-6 Both types of measurements are generally performed in transmission, although an earlier phaseresolved study was performed in reflection at grazing incidence.7 Transmission measurements are usually limited to samples grown on substrates such as Si 3 N 4 that are transparent in the soft x-ray regime. In this paper, we present the first phase-resolved XFMR measurements made in fluorescence yield. A Ta(5)[Cu(25)/Ta(3)] 3 /Cu(25)/Ta(10)/Ru(5)/ Co 50 Fe 50 (0.7)/Ni 90 Fe 10 (5)/Ru(3) stack (thicknesses in nanometers) was magnetron sputtered onto an insulating sapphire substrate. A second stack with a Dy(1) layer inserted between the Ni 90 Fe 10 (5) and the Ru(3) layers was also deposited. For today's thin sensor layers containing NiFe, the Fe concentration is typically in the range of 8-12%. It is for this reason that we look at Ni 90 Fe 10 as opposed to the more commonly studied Ni 80 Fe 20 . Elements with 490 lm Â 400 lm of the ferromagnetic bilayer were formed on the Cu underlayer by electron-beam lithography and ion beam milling. Photolithography was then used to pattern the exposed Cu into a coplanar waveguide structure with 50 X characteristic impedance. The experimental geometry for the XFMR measurement is shown in Fig. 1. Measurements were performed in the portable octupole magnet system (POMS) on beam lin...

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“…For the first time, clear experimental evidence was produced that the forced precession of the orbital magnetization components z could be detected in YIG films at the iron K-edge [1]. The precession of spinpolarized magnetization components induced by charge delocalizations was also detected at the L 2,3 edges of ions such as Y 3+ or La 3+ which are most often given as "diamagnetic" [5].…”

Section: Precession Dynamics Of Z and S Z Up To Thz Pump Frequenciesmentioning

confidence: 95%

“…E ≥ 2 keV) since the beamline optics and instrumentation are fairly different for the two spectral ranges. Actually, XDMR experiments have been reported which used either hard-XMCD [1][2][3][4][5], or soft-XMCD [6][7][8][9][10][11][12][13][14][15]. In this paper, we shall concentrate on XDMR experiments to be performed at the X-ray absorption K-edges of magnetic 3d transition elements, i.e.…”

Section: Magnetic Resonance With Element and Edge Selectivitymentioning

confidence: 98%

“…In these recent years, high quality XDMR spectra have been recorded at the ESRF in the microwave X-band for a variety of ferrimagnetic iron garnet thin films [1][2][3][4][5]. For the first time, clear experimental evidence was produced that the forced precession of the orbital magnetization components z could be detected in YIG films at the iron K-edge [1].…”

Section: Precession Dynamics Of Z and S Z Up To Thz Pump Frequenciesmentioning

confidence: 98%

See 1 more Smart Citation

X-Ray Detected Magnetic Resonance at Sub-THz Frequencies Using a High Power Gyrotron Source

Рогалев

Goulon

Goujon

et al. 2011

J Infrared Milli Terahz Waves

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X-ray Detected Magnetic Resonance (XDMR) is a novel spectroscopy which makes use of X-ray Magnetic Circular Dichroism (XMCD) to probe the resonant precession of local magnetization components in a strong microwave pump field. In Sections 1 and 2, we briefly review the conceptual bases of XDMR and the potential interest of increasing the pumping frequency up to the THz frequency range. In Sections 3-5, we discuss the feasibility of such challenging experiments. Starting from a comparison of experiments carried out either in the transverse (TRD) or longitudinal (LOD) detection geometries, we show that XDMR measurements at sub-THz frequencies require a substantial increase in pumping power: this is where a gyrotron source looks most appropriate. It is the aim of this paper to discuss how to conduct such experiments, emphasis being laid on feasibility tests recently carried out at the ESRF using a refurbished version of Gyrotron FU-II built at the FIR-FU. In this context, we propose a new detection scheme of sub-THz XDMR spectra based on the concept of frequency-mixing in LOD geometry.

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X-ray detected magnetic resonance at the Fe K-edge in YIG: Forced precession of magnetically polarized orbital components

Cited by 41 publications

References 13 publications

Magnonic crystals for data processing

Magnonic crystals for data processing

Phase-resolved x-ray ferromagnetic resonance measurements in fluorescence yield

X-Ray Detected Magnetic Resonance at Sub-THz Frequencies Using a High Power Gyrotron Source

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