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Analysis of the crystal electric field parameters of YbNi4P2

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Huesges,  Z.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Geibel,  C.
Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Stockert,  O.
Oliver Stockert, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Huesges, Z., Kliemt, K., Krellner, C., Sarkar, R., Klauß, H.-H., Geibel, C., et al. (2018). Analysis of the crystal electric field parameters of YbNi4P2. New Journal of Physics, 20: 073021, pp. 1-9. doi:10.1088/1367-2630/aace35.


Cite as: http://hdl.handle.net/21.11116/0000-0001-E2A3-7
Abstract
The crystal electric field (CEF) scheme ofYbNi(4)P(2) is determined, based on experimental data from inelastic neutron scattering, heat capacity, susceptibility and NMR measurements. Despite the tetragonal crystal structure, 9 parameters are needed to describe the crystal field in YbNi4P2 due to the orthorhombic site symmetry of the Yb ion. A large basal plane anisotropy is detected by the local probe NMR. Our analysis yields CEF excitation energies of 8.5, 12.5 and roughly 30 meV and a ground state wave function that is dominated by the 5/2 state. Furthermore, we present an analysis of the CEF scheme based on density functional theory calculations, which confirms the large basal plane anisotropy.