ANSTO User Meeting 2019

Session

Session 21

3 Dec 2019, 14:30

Muse

21. FeMn$_3$Ge$_2$Sn$_7$O$_{16}$ : a Spin-liquid Candidate with a Perfectly Isotropic 2-D Kagomé Lattice

Chris Ling (University of Sydney)

03/12/2019, 14:30

Emergent Physics

Oral

The compound Fe$_4$Si$_2$Sn$_7$O$_{16}$ has a hitherto unique crystal structure, consisting of ionic oxide layers based on edge-sharing FeO$_6$ and Sn$^{4+}$O$_6$ octahedra alternating with layers of intermetallic character based on FeSn$^{2+}_6$ octahedra, separated by covalent SiO$_4$ tetrahedra. The ionic layers contain kagomé lattices of magnetic Fe$^{2+}$ cations (octahedral crystal...

125. Patterning topological insulators using ion beams

Dr Cortie David (University of Wollongong), Zeljko Pastuovic (Centre for Accelerator Science of ANSTO)

03/12/2019, 14:45

Emergent Physics

Oral

The surfaces of Sb2Te3 topological insulator crystals were implanted using a 40 keV chromium ion beam at the Centre for Accelerator Science, ANSTO. The resulting chemical structure was studied using atomic-resolution transmission electron microscopy and soft X-ray absorption spectroscopy. A thin magnetic crystalline region is formed near the surface. A uniform valence state of Cr3+ is...