Exchange field effect in the crystal-field ground state of
Abstract
The crystal-field ground-state wave functions of the tetragonal, magnetically ordering Kondo lattice materials CeMAl4Si2 (M = Rh, Ir, and Pt) are determined in this paper with low-temperature linearly polarized soft-x-ray absorption spectroscopy, and estimates for the crystal-field splittings are given from the temperature evolution of the linear dichroism. Values for the dominant exchange field in the magnetically ordered phases can be obtained from fitting the influence of magnetic order on the linear dichroism. The direction of the required exchange field is || c for the antiferromagnetic Rh and Ir compounds, with the corresponding strength of the order of λex ≈ 6 meV (65 K). Finally and furthermore, the presence of Kondo screening in the Rh and Ir compound is demonstrated on the basis of the absorption due to f0 in the initial state.
- Authors:
-
- Univ. of Cologne (Germany). Inst. of Physics II
- Max Planck Inst. for Chemical Physics of Solids, Dresden (Germany)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
- Synchrotron SOLEIL, Saint-Aubin (France)
- Hiroshima Univ., Higashi-Hiroshima (Japan). Dept. of Quantum Matter
- Publication Date:
- Research Org.:
- Univ. of Cologne (Germany); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); LANL Laboratory Directed Research and Development (LDRD) Program; German Research Foundation (DFG)
- OSTI Identifier:
- 1415392
- Alternate Identifier(s):
- OSTI ID: 1319974
- Report Number(s):
- LA-UR-17-24463
Journal ID: ISSN 2469-9950; TRN: US1800793
- Grant/Contract Number:
- AC52-06NA25396; 615811
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 11; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; dichroism; RKKY interaction; heavy-fermion systems; crystal-field theory; Kondo lattice model; x-ray absorption spectroscopy; condensed matter & materials physics
Citation Formats
Chen, K., Strigari, F., Sundermann, M., Agrestini, S., Ghimire, N. J., Lin, S. -Z., Batista, C. D., Bauer, E. D., Thompson, J. D., Otero, E., Tanaka, A., and Severing, A. Exchange field effect in the crystal-field ground state of CeMAl4Si2. United States: N. p., 2016.
Web. doi:10.1103/PhysRevB.94.115111.
Chen, K., Strigari, F., Sundermann, M., Agrestini, S., Ghimire, N. J., Lin, S. -Z., Batista, C. D., Bauer, E. D., Thompson, J. D., Otero, E., Tanaka, A., & Severing, A. Exchange field effect in the crystal-field ground state of CeMAl4Si2. United States. https://doi.org/10.1103/PhysRevB.94.115111
Chen, K., Strigari, F., Sundermann, M., Agrestini, S., Ghimire, N. J., Lin, S. -Z., Batista, C. D., Bauer, E. D., Thompson, J. D., Otero, E., Tanaka, A., and Severing, A. Tue .
"Exchange field effect in the crystal-field ground state of CeMAl4Si2". United States. https://doi.org/10.1103/PhysRevB.94.115111. https://www.osti.gov/servlets/purl/1415392.
@article{osti_1415392,
title = {Exchange field effect in the crystal-field ground state of CeMAl4Si2},
author = {Chen, K. and Strigari, F. and Sundermann, M. and Agrestini, S. and Ghimire, N. J. and Lin, S. -Z. and Batista, C. D. and Bauer, E. D. and Thompson, J. D. and Otero, E. and Tanaka, A. and Severing, A.},
abstractNote = {The crystal-field ground-state wave functions of the tetragonal, magnetically ordering Kondo lattice materials CeMAl4Si2 (M = Rh, Ir, and Pt) are determined in this paper with low-temperature linearly polarized soft-x-ray absorption spectroscopy, and estimates for the crystal-field splittings are given from the temperature evolution of the linear dichroism. Values for the dominant exchange field in the magnetically ordered phases can be obtained from fitting the influence of magnetic order on the linear dichroism. The direction of the required exchange field is || c for the antiferromagnetic Rh and Ir compounds, with the corresponding strength of the order of λex ≈ 6 meV (65 K). Finally and furthermore, the presence of Kondo screening in the Rh and Ir compound is demonstrated on the basis of the absorption due to f0 in the initial state.},
doi = {10.1103/PhysRevB.94.115111},
journal = {Physical Review B},
number = 11,
volume = 94,
place = {United States},
year = {Tue Sep 06 00:00:00 EDT 2016},
month = {Tue Sep 06 00:00:00 EDT 2016}
}
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