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Coexistence of spin ordering on ladders and spin dimer formation in a new-structure-type compound Sr2Co3S2O3.


ABSTRACT: We report on the syntheses and characterizations of single crystalline and polycrystalline Sr2Co3S2O3 with a novel crystal structure type. It contains Co-O 2-leg rectangular ladders and necklace ladders. The two ladders share common legs and construct a hybrid spin ladder. A rare meridional heteroleptic octahedral coordination is found for the Co2+ ions in the 2-leg ladder. Within the necklace ladders, the Co2+ ions are in trans-octahedral coordination. An antiferromagnetic order is observed at TN?~?267?K, while a broad maximum in magnetic susceptibility is found below TN. This relatively high ordering temperature among Co-based ladder compounds is related to the highly anisotropic mer-coordination of the Co2+ ions. The trans-octahedrally coordinated Co2+ ions, on the other hand, corresponds to the possible short-range magnetic correlations through dimers with an effective . This results in a rare situation that spin ordering and spin dimers coexist down to 2?K.

SUBMITTER: Lai KT 

PROVIDER: S-EPMC5335616 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature

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Coexistence of spin ordering on ladders and spin dimer formation in a new-structure-type compound Sr<sub>2</sub>Co<sub>3</sub>S<sub>2</sub>O<sub>3</sub>.

Lai Kwing To KT   Valldor Martin M  

Scientific reports 20170303


We report on the syntheses and characterizations of single crystalline and polycrystalline Sr<sub>2</sub>Co<sub>3</sub>S<sub>2</sub>O<sub>3</sub> with a novel crystal structure type. It contains Co-O 2-leg rectangular ladders and necklace ladders. The two ladders share common legs and construct a hybrid spin ladder. A rare meridional heteroleptic octahedral coordination is found for the Co<sup>2+</sup> ions in the 2-leg ladder. Within the necklace ladders, the Co<sup>2+</sup> ions are in trans-o  ...[more]

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