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Hard X-ray polarizer to enable simultaneous three-dimensional nanoscale imaging of magnetic structure and lattice strain

TitleHard X-ray polarizer to enable simultaneous three-dimensional nanoscale imaging of magnetic structure and lattice strain
Publication TypeJournal Article
Year of Publication2016
AuthorsLogan, J, Harder, R, Li, LX, Haskel, D, Chen, P, Winarski, R, Fuesz, P, Schlagel, D, Vine, D, Benson, C, McNulty, I
JournalJournal of Synchrotron Radiation
Volume23
Pagination1210-1215
Date Published09
Type of ArticleArticle
ISBN Number1600-5775
Accession NumberWOS:000382299500022
KeywordsBragg coherent diffractive imaging, crystals, Instrumentation, nanomagnetism, optics, physics, strain, XMCD
Abstract

Recent progress in the development of dichroic Bragg coherent diffractive imaging, a new technique for simultaneous three-dimensional imaging of strain and magnetization at the nanoscale, is reported. This progress includes the installation of a diamond X-ray phase retarder at beamline 34-ID-C of the Advanced Photon Source. The performance of the phase retarder for tuning X-ray polarization is demonstrated with temperature-dependent X-ray magnetic circular dichroism measurements on a gadolinium foil in transmission and on a Gd5Si2Ge2 crystal in diffraction geometry with a partially coherent, focused X-ray beam. Feasibility tests for dichroic Bragg coherent diffractive imaging are presented. These tests include (1) using conventional Bragg coherent diffractive imaging to determine whether the phase retarder introduces aberrations using a nonmagnetic gold nanocrystal as a control sample, and (2) collecting coherent diffraction patterns of a magnetic Gd5Si2Ge2 nanocrystal with left- and right-circularly polarized X-rays. Future applications of dichroic Bragg coherent diffractive imaging for the correlation of strain and lattice defects with magnetic ordering and inhomogeneities are considered.

DOI10.1107/s1600577516009632
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Alternate JournalJ. Synchrot. Radiat.