Abstract
Synchrotron radiation based techniques provide unique insight into both the element and time resolved magnetization behavior in magnetic spin systems. Here, we highlight the power of two recent developments, utilizing x-ray scattering techniques to reveal the precessional magnetization dynamics of ordered spin structures in the GHz regime, both in diffraction and reflection configurations. Our recently developed diffraction and reflectometry ferromagnetic resonance (DFMR and RFMR) techniques provide novel ways to explore the dynamics of modern magnetic materials, thereby opening up new pathways for the development of spintronic devices. In this paper we provide an overview of these techniques, and discuss the new understanding they provide into the magnetization dynamics in the chiral magnetic structure in Y-type hexaferrite and the depth dependence to the magnetization dynamics in a [CoFeB/MgO/Ta]4 multilayer.
Highlights
We highlight some of the first results which reveal the complex dynamic behavior coupled to the chiral spin structure in Y-type hexaferrite Ba2Mg2Fe12O22.26 We show how the magnetization dynamics in a [CoFeB/MgO/Ta]4 multilayer has been revealed as a function of depth
We have discussed the combination of soft x-ray based synchrotron techniques with ferromagnetic resonance (FMR) to probe the magnetization dynamics in ordered magnetic systems
x-ray magnetic circular dichroism (XMCD) provides dichroic scitation.org/journal/adv contrast to the magnetization orientation, and when measured stroboscopically with the x-ray pulses synchronized to an applied RF field, x-ray detected ferromagnetic resonance (XFMR) provides a measure of the time evolution of the magnetization orientation during dynamic precession
Summary
Magnetic materials have played a pivotal role in the striking increase in performance of computer technologies over the past decades, most notably through the discovery of giant magnetoresistance and the subsequent improvements in hard disk storage density. For the development of novel technologies, spintronics is a strong contender and the high-speed dynamic properties of magnetic materials are important.Various techniques are available for the measurement of the dynamic properties of magnetic materials including Brillouinlight scattering and time-resolved magneto-optical Kerr effect measurements. Typically, broadband or cavity ferromagnetic resonance (FMR) is used to measure the power absorbed by a material when an RF magnetic field is applied to excite the dynamics in the spin system. Mapping out the power absorption as a function of RF frequency and applied bias magnetic field provides insight into the dynamic modes being excited within the magnetic material. Various techniques are available for the measurement of the dynamic properties of magnetic materials including Brillouinlight scattering and time-resolved magneto-optical Kerr effect measurements.. Broadband or cavity ferromagnetic resonance (FMR) is used to measure the power absorbed by a material when an RF magnetic field is applied to excite the dynamics in the spin system.. Mapping out the power absorption as a function of RF frequency and applied bias magnetic field provides insight into the dynamic modes being excited within the magnetic material. The orientation of the magnetization during ferromagnetic resonance can be described by the time evolution of precessional damping terms. Their combined action results in the magnetization mapping out a cone about the effective magnetic field axis
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
