Neutron scattering study of cyrstal fields in CeRhIn5
A.D. Christianson, J.M. Lawrence, P.G. Pagliuso, N.O. Moreno, J.L., Sarrao, J.D. Thompson, P.S. Riseborough, S. Kern, E.A. Goremychkin, and A.H., Lacerda
TL;DR
This study uses neutron scattering to identify crystal field excitations in CeRhIn5 and models their impact on magnetic and thermodynamic properties, incorporating Kondo physics effects.
Contribution
It provides detailed crystal field parameters for CeRhIn5 and integrates Kondo effects into susceptibility and specific heat calculations, advancing understanding of its magnetic behavior.
Findings
Two crystal field excitations at 6.9 and 23.6 meV identified.
Crystal field parameters fitted to neutron scattering data.
Kondo effects modeled to explain susceptibility and specific heat behavior.
Abstract
Neutron scattering results for the tetragonal compound CeRhIn5 give evidence for two crystal field (CF) excitations at 6.9 and 23.6 meV. The scattering can be fit assuming a set of CF parameters B = -1.03 meV, B = 0.044 meV and B = 0.122 meV. To compare our results to previous work, we calculate the susceptibility and specific heat for this CF scheme, including a molecular field term 35 mol/emu to account for the Kondo effect. We also include a calculation based on these CF parameters that uses the non-crossing approximation to the Anderson model to estimate the effect of Kondo physics on the susceptibility, specific heat and neutron linewidths.
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