Re-entrant Structural Phase Transition in a Frustrated Kagome Magnet, Rb2SnCu3F12

TL;DR

This study investigates the structural phase transition in Rb2SnCu3F12 using various diffraction techniques, revealing a possible re-entrant transition in powder form but not in single crystals.

Contribution

It reports the first observation of a re-entrant structural phase transition in a frustrated Kagome magnet, highlighting differences between powder and single crystal behaviors.

Findings

Re-entrant phase transition observed in powder diffraction data.

No transition detected in single crystal diffraction.

Transition occurs over a temperature range of 100 to 500 K.

Abstract

Rb2SnCu3F12 has been studied using synchrotron powder X-ray diffraction, powder neutron diffraction and single crystal X-ray diffraction at a range of temperatures (100 to 500 K). A broad but clear phase transition, possibly of re-entrant character, is found to occur in the powder form, whereas the corresponding transition is not seen in the single crystal.