Photon correlation spectroscopy with heterodyne mixing based on soft-x-ray magnetic circular dichroism
arXiv:2110.04790 · doi:10.1103/PhysRevB.105.214425
Abstract
Many magnetic equilibrium states and phase transitions are characterized by fluctuations. Such magnetic fluctuation can in principle be detected with scattering-based x-ray photon correlation spectroscopy (XPCS). However, in the established approach of XPCS, the magnetic scattering signal is quadratic in the magnetic scattering cross section, which results not only in often prohibitively small signals but also in a fundamental inability to detect negative correlations (anticorrelations). Here, we propose to exploit the possibility of heterodyne mixing of the magnetic signal with static charge scattering to reconstruct the first-order (linear) magnetic correlation function. We show that the first-order magnetic scattering signal reconstructed from heterodyne scattering now directly represents the underlying magnetization texture. Moreover, we suggest a practical implementation based on an absorption mask rigidly connected to the sample, which not only produces a static charge scattering signal but also eliminates the problem of drift-induced artificial decay of the correlation functions. Our method thereby significantly broadens the range of scientific questions accessible by magnetic x-ray photon correlation spectroscopy.
References in corpus (12)
- Long-range incommensurate charge fluctuations in (Y,Nd)Ba2Cu3O(6+x)
- Coherent methods in the X-ray sciences
- Thermal skyrmion diffusion applied in probabilistic computing
- Atomic-scale relaxation dynamics and aging in a metallic glass probed by X-ray photon correlation spectroscopy
- Extensive degeneracy, Coulomb phase and magnetic monopoles in an artificial realization of the square ice model
- Direct measurement of antiferromagnetic domain fluctuations
- Dynamical charge density fluctuations pervading the phase diagram of a Cu-based high-Tc superconductor
- Quasistatic x-ray speckle metrology of microscopic magnetic return point memory
- Persistent Charge Density Wave Memory in a Cuprate Superconductor
- Magnetic domain fluctuations in an antiferromagnetic film observed with coherent resonant soft x-ray scattering
- Spontaneous Magnetic Superdomain Wall Fluctuations in an Artificial Antiferromagnet
- Shaping nanoscale magnetic domain memory in exchange-coupled ferromagnets by field cooling