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  Metamagnetism and crystal-field splitting in pseudohexagonal CeRh3Si2

Amorese, A., Khalyavin, D., Kummer, K., Brookes, N. B., Ritter, C., Zaharko, O., et al. (2022). Metamagnetism and crystal-field splitting in pseudohexagonal CeRh3Si2. Physical Review B, 105(12): 125119, pp. 1-15. doi:10.1103/PhysRevB.105.125119.

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 Creators:
Amorese, Andrea1, Author              
Khalyavin, Dmitry2, Author
Kummer, Kurt2, Author
Brookes, Nicholas B.2, Author
Ritter, Clemens2, Author
Zaharko, Oksana2, Author
Larsen, Camilla Buhl2, Author
Pavlosiuk, Orest2, Author
Pikul, Adam P.2, Author
Kaczorowski, Dariusz2, Author
Gutmann, Matthias2, Author
Boothroyd, Andrew T.2, Author
Severing, Andrea2, Author
Adroja, Devashibhai T.2, Author
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2External Organizations, ou_persistent22              

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 Abstract: CeRh3Si2 has been reported to exhibit metamagnetic transitions below 5 K, a giant crystal field splitting, and anisotropic magnetic properties from single crystal magnetization and heat capacity measurements. Here we report results of neutron and x-ray scattering studies of the magnetic structure and crystal-field excitations to further understand the magnetism of this compound. Inelastic neutron scattering and resonant inelastic x-ray scattering reveal a Jz = 1/2 ground state for Ce when considering the crystallographic a direction as quantization axis, thus explaining the anisotropy of the static susceptibility. Furthermore, we find a total splitting of 78 meV for the J = 5/2 multiplet. The neutron diffraction study in zero field reveals that, on cooling from the paramagnetic state, the system first orders at TN1 = 4.7 K in a longitudinal spin density wave with ordered Ce moments along the b axis (i.e., the [0 1 0] crystal direction) and an incommensurate propagation vector k = (0, 0.43, 0). Below the lower-temperature transition TN2 = 4.48 K, the propagation vector locks to the commensurate value k = (0, 0.5, 0), with a so-called lock-in transition. Our neutron diffraction study in applied magnetic field H II b axis shows a change in the commensurate propagation vector and development of a ferromagnetic component at H = 3 kOe, followed by a series of transitions before the fully field-induced ferromagnetic phase is reached at H = 7 kOe. This explains the nature of the steps previously reported in field-dependent magnetization measurements. A very similar behavior is also observed for the H II [0 1 1] crystal direction.

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Language(s): eng - English
 Dates: 2022-03-152022-03-15
 Publication Status: Published in print
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 105 (12) Sequence Number: 125119 Start / End Page: 1 - 15 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008