Journal
PHYSICAL REVIEW B
Volume 100, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.100.104301
Keywords
-
Funding
- Karlsruhe Nano Micro Facility (KNMF)
- Alexander von Humboldt Foundation
Ask authors/readers for more resources
We report on the lattice and spin dynamics in monopnictide CrAs using polarized Raman scattering. This system exhibits a first-order magnetostructural phase transition at T-N similar to 265 K, below which the magnetic moments of Cr form an incommensurate double helical magnetic structure while the unit-cell volume abruptly expands. Across the transition, the frequencies of the fully symmetric A(g) phonons strongly renormalize, which along with the results of first-principles calculations suggests the presence of a sizeable coupling of the phonons to the magnetic degrees of freedom in this compound. In addition, we observe two broad modes at around 350 and 1700 cm(-1) in the magnetic phase, which we associate with two-magnon Raman scattering. This work provides one of the few examples of magnetic Raman scattering from a noncollinear magnet.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available