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3 Acta Physica Polonica A

3 2017

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In Situ Electron Beam Amorphization of Sb₂Te₃ within Single Walled Carbon Nanotubes

100%

Marks S. , Morawiec K. , Dluzewski P. , Kret S. , Sloan J.

Acta Physica Polonica A

2017

tom 131

nr 5

1324-1327

In this study, we reveal the crystallography, crystallinity, and amorphization of low-dimensional crystals of the topological insulator and phase change material Sb₂Te₃ within both discrete and bundled single walled carbon nanotubes with a diameter range spanning 1.3-1.7 nm by a combination of electron diffraction, aberration-corrected high resolution imaging, and variable dose electron beam irradiation. We further reveal that electron diffraction indicates that the crystallinity of the host single walled carbon nanotubes is largely unaffected by this process indicating that mass loss during the observed in situ glass transition had not occurred and that the template had maintained its structural integrity. Such a transition would not be possible with any other common nanoporous template for which the pores would be enlarged due to likely sintering.

Off-Axis Electron Holography of Magnetic Nanostructures: Magnetic Behavior of Mn Rich Nanoprecipitates in (Mn,Ga)As System

86%

Barańska M. , Dłużewski P. , Kret S. , Morawiec K. , Li T. , Sadowski J.

Acta Physica Polonica A

2017

tom 131

nr 5

1406-1408

The Lorentz off-axis electron holography technique is applied to study the magnetic nature of Mn rich nanoprecipitates in (Mn,Ga)As system. The effectiveness of this technique is demonstrated in detection of the magnetic field even for small nanocrystals having an average size down to 20 nm.

Application of Graphics Processing Unit for In-Line Electron Holography

86%

Morawiec K. , Dłużewski P. , Kret S. , Szczepańska A. , Li T. , Sloan J.

Acta Physica Polonica A

2017

tom 131

nr 5

1353-1356

In the present work, software for exit electron wave reconstruction based on the iterative approach was implemented and a new method for drift-correction of the focal series was proposed.