Time-spliced X-ray Diffraction Imaging of Magnetism Dynamics in a NdNiO Thin Film

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2018 Feb 15

PMID 29440492

Citations 1

Authors

Kenneth R Beyerlein

Affiliations

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Abstract

Diffraction imaging of nonequilibrium dynamics at atomic resolution is becoming possible with X-ray free-electron lasers. However, there are unresolved problems with applying this method to objects that are confined in only one dimension. Here I show that reliable one-dimensional coherent diffraction imaging is possible by splicing together images recovered from different time delays in an optical pump X-ray probe experiment. The time and space evolution of antiferromagnetic order in a vibrationally excited complex oxide heterostructure is recovered from time-resolved measurements of a resonant soft X-ray diffraction peak. Midinfrared excitation of the substrate is shown to lead to a demagnetization front that propagates at a velocity exceeding the speed of sound, a critical observation for the understanding of driven phase transitions in complex condensed matter.

Citing Articles

Measuring non-equilibrium dynamics in complex solids with ultrashort X-ray pulses.

Buzzi M, Forst M, Cavalleri A Philos Trans A Math Phys Eng Sci. 2019; 377(2145):20170478.

PMID: 30929635 PMC: 6452049. DOI: 10.1098/rsta.2017.0478.

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