Antiferromagnetism and mixed valency in the new Kondo lattice compound Ce3Rh4Sn7

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10456638" target="_blank" >RIV/00216208:11320/22:10456638 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=uox.fbIU4g" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=uox.fbIU4g</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jallcom.2022.166941" target="_blank" >10.1016/j.jallcom.2022.166941</a>

Result language
angličtina
Original language name
Antiferromagnetism and mixed valency in the new Kondo lattice compound Ce3Rh4Sn7
Original language description
Single crystals of a new ternary compound Ce3Rh4Sn7 were synthesized by flux method and its crystal structure and magnetic properties were studied by single crystal X-ray diffraction and magnetic suscept-ibility, specific heat and resistivity measurements. Ce3Rh4Sn7 crystallizes in a new monoclinic crystal structure, space group P2(1)/m (No. 11) with Z = 2 and lattice parameters alpha = 9.8708(5) angstrom, b = 4.5779(3) A and c = 14.2381(7) angstrom, beta = 109.535(5)degrees, and V = 606.35(6) A(3). The structure exhibits three inequivalent Ce-sites. A striking structural motif is the tetragonal pyramid of Rh-ions surrounding the Ce2 yielding an extreme short Ce2-Rh1 spacing of d = 2.7486(10) angstrom. This strong hint to mixed valent cerium behavior is supported by the entropy analysis. We argue that the Ce2-ion is in a nonmagnetic Ce3+delta state while the other 2 Ce-sites are in a trivalent state. At low temperatures these latter become partially Kondo screened (TK approximate to 4 K) and order antiferromagnetic below T-N = 2.31 K. The ordering is accompanied by a superzone gap-opening in direction of the magnetic propagation vector Q = (0, 0, l). (c) 2022 Elsevier B.V. All rights reserved.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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