The Interplay of Magnetic Order with the Electronic Scattering and Crystal‐Field Effects in a Metallic Ferromagnet
Source abstract
Abstract
ABSTRACT The interplay between magnetic order, charge dynamics, and crystal field excitations underpins the emergent ground states of rare‐earth intermetallics. Using time‐domain terahertz spectroscopy, we probe this coupling in PrSi, a metallic ferromagnet. The optical response exhibits pronounced Drude–Smith behavior over a broad temperature range, indicating persistent carrier scattering. A classical Kondo‐lattice model (CKLM) attributes this non‐Drude conductivity to scattering of itinerant electrons by localized magnetic moments, persisting down to temperatures well below the magnetic ordering scale. At lower temperatures, beyond the scope of CKLM, our experiment reveals that the response is dominated by crystal field excitations, with sharp transitions at 0.6 and 1.54 THz. The mode at 1.54 THz shows a dynamic correlation with the onset of ferromagnetic order, marking the onset of a crystal‐field‐governed low temperature regime.
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Research context
OpenAlex topics: Rare-earth and actinide compounds · Topological Materials and Phenomena · Advanced Condensed Matter Physics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Physical Sciences National Institute of Science Education and Research An OCC of HBNI Jatni Odisha India
Department of Materials ETH Zurich Zurich Switzerland
Department of Condensed Matter Physics and Materials Science Tata Institute of Fundamental Research Mumbai India
Department of General Sciences (Physics) Birla Institute of Technology and Science, Pilani, Dubai Campus Dubai International Academic City Dubai United Arab Emirates
Department of Physics Birla Institute of Technology and Science Pilani, Hyderabad Campus Telangana India
Department of Physics Savitribai Phule Pune University Pune India
MIE‐SPPU Institute of Higher Education Doha Qatar
Funding
Department of Atomic Energy, Government of India · Science and Engineering Research Board
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