Magnetoelastic coupling across the field-induced transition of uranium mononitride
Magnetoelastic coupling across the field-induced transition of uranium mononitride
Gorbunov, D.; Nomura, T.; Zvyagin, A. A.; Henriques, M. S.; Andreev, A. V.; Skourski, Y.; Zvyagina, G. A.; Troc, R.; Zherlitsyn, S.; Wosnitza, J.
Uranium mononitride (UN) displays a spin-flop-like transition for magnetic field applied along all principal crystallographic directions just below 60 T. Here, we report on ultrasound and magnetocaloric-effect results for UN in pulsed magnetic fields up to 65 T. The field-induced phase transition causes a discontinuous temperature decrease, indicating a larger magnetic entropy above the transition. Furthermore, we find pronounced anomalies in the acoustic properties, which signals strong spin-lattice interactions. A further anomaly observed at fields slightly above the transition is likely related to the formation of magnetic domains. A model based on the exchange-striction coupling mechanism well reproduces the strong renormalization of the acoustic properties.
Involved research facilities
- High Magnetic Field Laboratory (HLD)
-
Physical Review B 100(2019), 024417
DOI: 10.1103/PhysRevB.100.024417
Cited 6 times in Scopus
Downloads
- Final Draft PDF 730 kB Secondary publication
Permalink: https://www.hzdr.de/publications/Publ-29502