Structural phase transition in Ba(Fe0.973Cr0.027)2As2 single crystals
S. L. Bud'ko, S. Nandi, N. Ni, A. Thaler, A. Kreyssig, A. Kracher,, J.-Q. Yan, A. I. Goldman, P. C. Canfield
TL;DR
This study investigates the structural phase transition in Ba(Fe0.973Cr0.027)2As2 single crystals, revealing a first-order transition from tetragonal to orthorhombic structure at around 112 K through various measurements.
Contribution
It provides detailed thermodynamic, structural, and transport data confirming the first-order nature of the phase transition, contrasting previous reports.
Findings
Sharp anomalies at ~112 K in measurements
First-order transition from tetragonal to orthorhombic structure
Contradicts earlier reports of transition nature
Abstract
We present thermodynamic, structural and transport measurements on Ba(Fe0.973Cr0.027)2As2 single crystals. All measurements reveal sharp anomalies at ~ 112 K. Single crystal x-ray diffraction identifies the structural transition as a first order, from the high-temperature tetragonal I4/mmm to the low-temperature orthorhombic Fmmm structure, in contrast to an earlier report.
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Taxonomy
TopicsIron-based superconductors research · Rare-earth and actinide compounds · Magnetic Properties of Alloys