Achieving atomic resolution magnetic dichroism by controlling the phase symmetry of an electron probe

Rusz, Jan; Idrobo, Juan -Carlos; Bhowmick, Somnath

doi:10.1103/PhysRevLett.113.145501

Title: Achieving atomic resolution magnetic dichroism by controlling the phase symmetry of an electron probe

Journal Article · Tue Sep 30 00:00:00 EDT 2014 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.113.145501· OSTI ID:1213313

Rusz, Jan ^[1]; Idrobo, Juan -Carlos ^[2]; Bhowmick, Somnath ^[3]

Uppsala Univ., Uppsala (Sweden)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Indian Institute of Technology, Kanpur (India)

The calculations presented here reveal that an electron probe carrying orbital angular momentum is just a particular case of a wider class of electron beams that can be used to measure electron magnetic circular dichroism (EMCD) with atomic resolution. It is possible to obtain an EMCD signal with atomic resolution by simply breaking the symmetry of the electron probe phase front using the aberration-corrected optics of a scanning transmission electron microscope. The probe’s required phase distribution depends on the sample’s magnetic symmetry and crystal structure. The calculations indicate that EMCD signals that use the electron probe’s phase are as strong as those obtained by nanodiffraction methods.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1213313

Journal Information:: Physical Review Letters, Vol. 113, Issue 14; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 37 works

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