Revisiting the physical properties of Ce2Ru3Ga9: Intermediate valence, or Kondo lattice system?

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10385341" target="_blank" >RIV/00216208:11320/19:10385341 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=k6LytzfzfN" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=k6LytzfzfN</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2018.09.131" target="_blank" >10.1016/j.jallcom.2018.09.131</a>

Result language

angličtina

Original language name

Revisiting the physical properties of Ce2Ru3Ga9: Intermediate valence, or Kondo lattice system?

Original language description

In this paper we discuss in details the experimental results regarding to the crystal structure, magnetic, electronic and thermal transport properties of the strongly correlated compound Ce2Ru3Ga9. Based on these data we report the observation of coexistence and competition between intermediate valence state on Ce ions and Kondo-like behaviour in a high-quality polycrystalline alloy. Intermediate valence behaviour manifests itself in the temperature dependence of the magnetic susceptibility (x), which reveals a broad maximum at around 335 K as is frequently observed for Ce compounds with mixed-valent Ce3+/4+. The electrical resistivity (rho) behaves in a manner characteristic of systems with strong electronic correlations. First varies in a metallic manner, typical for intermediate valence compounds and than demonstrating a behaviour pointing on the onset of coherence that develops above the room temperature. The thermoelectric power (S) shows a broad maximum with a relatively large value of S-max 35.7 mu V/K, which is typical for the Ce-based systems that exhibit a strong c-f hybridization. Both rho(T) and S(T) show the - lnT behaviour at high temperatures thereby indicating on the presence of incoherent electron scattering on a local moment of Ce3+. Moreover, a particular attention has been paid to the low-T behaviour in the investigated physical quantities, as it is one of the focuses of this paper. (C) 2018 Elsevier B.V. All rights reserved.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

<a href="/en/project/EF15_003%2F0000485" target="_blank" >EF15_003/0000485: Nanomaterials centre for advanced applications</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Volume of the periodical

773

Issue of the periodical within the volume

leden

Country of publishing house

CH - SWITZERLAND

Number of pages

8

Pages from-to

462-469

UT code for WoS article

000449741200052

EID of the result in the Scopus database

2-s2.0-85053835504