Abstract
We report the first direct observation of the influence of high magnetic fields on the Jahn-Teller (JT) transition in . Contrary to spectroscopic and magnetic methods, x-ray diffraction directly measures the JT distortion; the splitting between the and pairs of Bragg reflections is proportional to the order parameter. Our experimental results are compared to mean-field calculations, taking into account all possible orientations of the grains relative to the applied field, and qualitative agreement is obtained.
- Received 19 November 2007
DOI:https://doi.org/10.1103/PhysRevLett.100.056405
©2008 American Physical Society