Abstract
In this work, we report a study on the infrared transmission spectroscopy of the double perovskite Ba2YMoO6. At 300 K, three bands are observed at ∼255.1 cm−1, ∼343.4 cm−1, and ∼561.5 cm−1, which are related to the motion between the cation Ba2+ and the anion YMO6−2, the Y-O stretching motion, and the stretching vibration of the MoO6 octahedron, respectively. These modes continue to harden upon cooling owing to the shrink of the lattice constant. When the temperature decreases to T≤130 K around which the spin singlet dimer begins to form, an additional phonon mode appears at ∼611 cm−1, suggesting the occurrence of local distortion of MoO6 octahedra. With further decrease of the temperature, its intensity enhances and its peak position keeps unchanged. These results indicate that the formation of the spin singlet dimers is accompanied with the occurrence of the local structure distortion of MoO6 octahedra, providing evidence for the strong spin-phonon coupling in the double perovskite Ba2YMoO6.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
