The Interplay of Magnetic Order with the Electronic Scattering and Crystal‐Field Effects in a Metallic Ferromagnet

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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Publication Details

Journal
Advanced Science
Published
2025-12-30
DOI
https://doi.org/10.1002/advs.202517704
Primary Topic
Rare-earth and actinide compounds
Type
article
Field-Weighted Citation Impact
0.00

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article

The Interplay of Magnetic Order with the Electronic Scattering and Crystal‐Field Effects in a Metallic Ferromagnet

Ruta Kulkarni, Shovon Pal, Vikas Kashid, A. Thamizhavel et al.
Advanced Science
Rare-earth and actinide compounds
article

The Interplay of Magnetic Order with the Electronic Scattering and Crystal‐Field Effects in a Metallic Ferromagnet

Ruta Kulkarni, Shovon Pal, Vikas Kashid, A. Thamizhavel, Anamitra Mukherjee, Shishir Kumar Pandey, Payel Shee, Nainish Tickoo, Ratiranjan Samal, Chia‐Jung Yang, Tanaya Halder, Ashis K. Nandy
article en

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.

Advanced ScienceVol. 13(13)
Tata Institute of Fundamental Research (IN), National Institute of Science Education and Research (IN), Synergy University Dubai (AE), ETH Zurich (CH), Ministry of Education and Higher Education (QA), Birla Institute of Technology and Science - Hyderabad Campus (IN), Birla Institute of Technology and Science, Pilani - Dubai Campus (AE), Savitribai Phule Pune University (IN)
National Institute of Science Education and Research, Science and Engineering Research Board
Openalex Percentile: Top 29%
Rare-earth and actinide compounds
DOIOpen Access PDFOpenAlex
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