Structural evolution with temperature and magnetoelastic coupling across the TN in the rare-earth chromites family

The main objective of this proposal is to study the structural evolution of rare-earth chromites RCrO3 (R = Sm, Eu, Gd, Tb, Dy, Ho, Lu) from 4 K to 1073 K. We will study their behavior through the magnetic transition to observe possible magnetoelastic effects and we will investigate the temperature evolution of several structural features, such as the superexchange angle, to understand their behavior above room temperature, a temperature interval barely explored in the past.

本提案的核心研究目标为探究稀土铬酸盐RCrO₃（R为钐（Sm）、铕（Eu）、钆（Gd）、铽（Tb）、镝（Dy）、钬（Ho）、镥（Lu））在4 K至1073 K温度区间内的结构演化过程。我们将通过分析其磁相变行为，观测可能存在的磁弹性效应（magnetoelastic effects）；同时将研究多项结构特征随温度的演化规律，例如超交换角（superexchange angle），以阐明其在室温以上温度区间的行为特性——该温度区间在过往研究中几乎未得到系统探索。