Longitudinal detection of ferromagnetic resonance using x-ray transmission measurements

Boero, Giovanni; Rusponi, Stefano; Kavich, J. J.; Rizzini, A. Lodi; Piamonteze, Cınthia; Nolting, F.; Tieg, C.; Thiele, Jan-Ulrich; Gambardella, Pietro

doi:10.1063/1.3267192

Cited by 21 publications

(17 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regarding Eq. (16), it is tempting to argue that the four-magnon scattering process of Fig. 5 b should leave M z unaffected because two uniform magnons are replaced by two degenerate magnons, the total number of magnons thus remaining constant.…”

Section: Excitation Of Collective Modesmentioning

confidence: 97%

“…Eq. (16) implies that all types of magnons-including uniform magnons-decrease M z ; Eq. (17) states that all spin waves but the uniform mode decrease jMj.…”

Section: Normal Modes Of Precessionmentioning

confidence: 98%

“…It was rapidly realized that XDMR measurements under continuous wave (CW) excitation were preferable and could be carried out not only in the timeresolved mode but also in the frequency domain using timeaveraged data acquisition methods. Several reports have been published which concern soft-XDMR spectra recorded either in transmission [10][11][12][13], or in the fluorescence yield detection mode [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

X-ray detected magnetic resonance of YIG thin films in the nonlinear regime of spin waves

Goulon

Rogalev

Wilhelm

et al. 2010

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

Section: Excitation Of Collective Modesmentioning

confidence: 97%

“…Eq. (16) implies that all types of magnons-including uniform magnons-decrease M z ; Eq. (17) states that all spin waves but the uniform mode decrease jMj.…”

Section: Normal Modes Of Precessionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

X-ray detected magnetic resonance of YIG thin films in the nonlinear regime of spin waves

Goulon

Rogalev

Wilhelm

et al. 2010

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

“…In practice, the response of individual layers can only be inferred indirectly by comparing the experimental FMR spectra with micromagnetic modelling [14]. Recently, x-ray detected FMR (XFMR) has emerged as a powerful synchrotron radiation based tool that can be used to study the element-selective magnetization dynamics [19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Magnetic and chemical contrast in XFMR is obtained by x-ray magnetic circular dichroism (XMCD) [33,34], while phase differences in the magnetization precessions can be monitored using a stroboscopic measurement technique.…”

Section: Introductionmentioning

confidence: 99%

Magnetization dynamics in an exchange-coupled NiFe/CoFe bilayer studied by x-ray detected ferromagnetic resonance

et al. 2015

View full text Add to dashboard Cite

Exchange-coupled hard and soft magnetic layers find extensive use in data storage applications, for which their dynamical response has great importance. With bulk techniques, such as ferromagnetic resonance (FMR), it is difficult to access the behaviour and precise influence of each individual layer. By contrast, the synchrotron radiation-based technique of x-ray detected ferromagnetic resonance (XFMR) allows element-specific and phase-resolved FMR measurements in the frequency range 0.5-11 GHz. Here, we report the study of the magnetization dynamics of an exchange-coupled Ni 0.81 Fe 0.19 (43.5 nm)/Co 0.5 Fe 0.5 (30 nm) bilayer system using magnetometry and vector network analyser FMR, combined with XFMR at the Ni and Co L 2 x-ray absorption edges. The epitaxially grown bilayer exhibits two principal resonances denoted as the acoustic and optical modes. FMR experiments show that the Kittel curves of the two layers cannot be taken in isolation, but that their modelling needs to account for an interlayer exchange coupling. The angular dependence of FMR indicates a collective effect for the modes of the magnetically hard CoFe and soft NiFe layer. The XFMR precessional scans show that the acoustic mode is dominated by the Ni signal with the Co and Ni magnetization precessing in phase, whereas the optical mode is dominated by the Co signal with the Co and Ni magnetization precessing in anti-phase. The response of the Co signal at the Ni resonance, and vice versa, show induced changes in both amplitude and phase, which can be ascribed to the interface exchange coupling. An interesting aspect of phase-resolved XFMR is the ability to distinguish between static and dynamic exchange coupling. The element-specific precessional scans of the NiFe/CoFe bilayer clearly have the signature of static exchange coupling, in which the effective field in one layer is aligned along the magnetization direction of the other layer.

show abstract

“…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: 97%

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

View full text Add to dashboard Cite

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.

show abstract

Longitudinal detection of ferromagnetic resonance using x-ray transmission measurements

Cited by 21 publications

References 41 publications

X-ray detected magnetic resonance of YIG thin films in the nonlinear regime of spin waves

X-ray detected magnetic resonance of YIG thin films in the nonlinear regime of spin waves

Magnetization dynamics in an exchange-coupled NiFe/CoFe bilayer studied by x-ray detected ferromagnetic resonance

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

Contact Info

Product

Resources

About