Abstract
has been synthesized and found to form in the tetragonal structure with lattice parameters and . Upon cooling through 170 K, undergoes a first-order structural phase transition to a low-temperature orthorhombic phase with a 2–3 K range of hysteresis and coexistence. This transition is clearly evident in microscopic, thermodynamic, and transport measurements. is the third member of the family to exhibit such a dramatic phase transition and is a promising candidate for studies of doping induced superconductivity.
1 More- Received 26 June 2008
DOI:https://doi.org/10.1103/PhysRevB.78.014523
©2008 American Physical Society