From the equivalent quasiparticle point of view, spin waves are known as magnons, which are bosonic modes of the spin lattice that correspond roughly to the phonon excitations of the nuclear lattice. As temperature is increased, the thermal excitation of spin waves reduces a ferromagnet's spontaneous magnetization.

2024年10月16日 · Here, we report the discovery — using circularly polarized X-rays for the unambiguous isolation of magnetic signals — of a nearly flat spin-wave band and large (compared to elemental iron ...

2020年8月1日 · We begin with a study of spin waves in an one-dimensional chain of classical spins. Then we present a macroscopic view of long-wavelength spin waves in a 3-dimensional ferromagnet, with an approach based on the Landau–Lifshitz equation of …

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2023年2月2日 · Here, we report the discovery, using circularly polarized x-rays for the unambiguous isolation of magnetic signals, of a nearly flat spin wave band and large (compared to elemental iron) orbital moment for the metallic ferromagnet Fe3Sn2, built from compact AB-stacked kagome bilayers and which has a topologically non-trivial electronic band ...

2025年1月15日 · The magnitude of the anomalous Hall torque is sufficiently large to fully negate magnetic damping of the ferromagnet, which allows us to implement a microwave spin torque nano-oscillator driven...

2023年5月15日 · In this work, we use ultrashort light pulses to generate spin wavepackets in a kagome-layered ferromagnet and to follow their subsequent motion. A significant result is that the arrival of magnetization at a remote location occurs in a time far shorter than expected from the spin wave velocity.

2018年3月27日 · Incommensurate spin-density wave (ISDW) phases have long been known to be generated from paramagnetic (PM) metals either through a Fermi surface (FS) instability known as nesting or through the...

5 天之前 · It would be very helpful to have general principles that can reliably determine spin wave polarization in ferromagnet, and more importantly distinguishing the different roles of various interactions on spin wave polarization. ... Stancil and Prabhakar [2009] D. D. Stancil and A. Prabhakar, Spin Waves: Theory and Applications (Springer US ...

2019年6月19日 · Spin waves are investigated in yttrium iron garnet waveguides with a thickness of 39 nm and widths ranging down to 50 nm, i.e., with an aspect ratio thickness over width approaching unity, using Brillouin light scattering spectroscopy. The experimental results are verified by a semianalytical theory and micromagnetic simulations.