English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the zaia usage as premium feature

ZAIA

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the access of premium content as premium feature

Premium Content

Zendy Tools

Zendy Open

Thresholds for beam damage have been assessed for La$_{0.7}$Sr$_{0.3}$MnO$_3$and SrTiO$_3$ as a function of electron probe current and exposure time at 80and 200 kV acceleration voltage. The materials were exposed to an intenseelectron probe by aberration corrected scanning transmission electronmicroscopy (STEM) with simultaneous acquisition of electron energy lossspectroscopy (EELS) data. Electron beam damage was identified by changes of thecore loss fine structure after quantification by a refined and improved modelbased approach. At 200 kV acceleration voltage, damage in SrTiO$_3$ wasidentified by changes both in the EEL fine structure and by contrast changes inthe STEM images. However, the changes in the STEM image contrast as introducedby minor damage can be difficult to detect under several common experimentalconditions. No damage was observed in SrTiO$_3$ at 80 kV acceleration voltage,independent of probe current and exposure time. In La$_{0.7}$Sr$_{0.3}$MnO$_3$,beam damage was observed at both 80 and 200 kV acceleration voltages. Thisdamage was observed by large changes in the EEL fine structure, but not by anydetectable changes in the STEM images. The typical method to validate if damagehas been introduced during acquisitions is to compare STEM images prior to andafter spectroscopy. Quantifications in this work show that this method possiblycan result in misinterpretation of beam damage as changes of materialproperties.

Assessing electron beam sensitivity for SrTiO$_3$ and La$_{0.7}$Sr$_{0.3}$MnO$_3$ using electron energy loss spectroscopy