TY - JOUR

T1 - Cs2Ln3CuS8 (Ln = La-Nd, Sm-Tb): Synthesis, Crystal Structure, and Magnetic and Optical Properties

AU - Pomelova, Tatiana A

AU - Delacotte, Charlène

AU - Kuratieva, Natalia V

AU - Lemoine, Pierric

AU - Cordier, Stéphane

AU - Park, SangJun

AU - Guizouarn, Thierry

AU - Pelletier, Vincent

AU - Gautier, Regis

AU - Naumov, Nikolay G

N1 - Funding: The research was supported by the Ministry of Science and Higher Education of the Russian Federation, No. 121031700315-2.

PY - 2023/5/1

Y1 - 2023/5/1

N2 - This work reports the preparation of new quaternary sulfides Cs2Ln3CuS8 (Ln = La-Nd, Sm-Tb), their original crystal and electronic structures, and their magnetic properties. The sulfides were prepared using a reactive flux method from mixtures of Ln2S3 (EuS), Cs2S6, Cu2S, and S. They crystallize in a new type of structure (C2/m space group) and exhibit a layer-like crystal structure, which is a hybrid of those of the ACe2CuS6 series (A = Cs, K) and that of K2CeCu2S4. The values of the optical band gap calculated by the Kubelka-Munk equation are in the range of 1.2-2.62 eV depending on the nature of the Ln ion. The Cs2Gd3CuS8 compound displays relatively great magnetic refrigerating properties at cryogenic temperature with the mass entropy change (-ΔSM) reaching 19.5 J kg-1 K-1 at 3.5 K for ΔH = 5 T.

AB - This work reports the preparation of new quaternary sulfides Cs2Ln3CuS8 (Ln = La-Nd, Sm-Tb), their original crystal and electronic structures, and their magnetic properties. The sulfides were prepared using a reactive flux method from mixtures of Ln2S3 (EuS), Cs2S6, Cu2S, and S. They crystallize in a new type of structure (C2/m space group) and exhibit a layer-like crystal structure, which is a hybrid of those of the ACe2CuS6 series (A = Cs, K) and that of K2CeCu2S4. The values of the optical band gap calculated by the Kubelka-Munk equation are in the range of 1.2-2.62 eV depending on the nature of the Ln ion. The Cs2Gd3CuS8 compound displays relatively great magnetic refrigerating properties at cryogenic temperature with the mass entropy change (-ΔSM) reaching 19.5 J kg-1 K-1 at 3.5 K for ΔH = 5 T.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85154056433&origin=inward&txGid=a3047422a52fc56a501cd3b35b5df9f7

UR - https://www.mendeley.com/catalogue/6859b870-cb27-327e-8252-295736d56370/

U2 - 10.1021/acs.inorgchem.2c03447

DO - 10.1021/acs.inorgchem.2c03447

M3 - Article

C2 - 37070741

VL - 62

SP - 6586

EP - 6597

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

IS - 17

ER -