Details

Autor(en) / Beteiligte

• Liang, I C
• Weng, C Y
• Huang, C
• Chang, C K
• Sheu, H S
• Lin, J G
• Hsu, K F

Titel

New metal chalcogenides found in Mn N-1 (Gd 2-x In x )S N+2 (N = 3, 4, 5): syntheses, structures, and magnetic properties

Ist Teil von

• Dalton transactions : an international journal of inorganic chemistry, 2017-01, Vol.46 (4), p.1228-1236

Ort / Verlag

England

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Three new metal chalcogenides have been identified in Mn (Gd In )S with N = 3, 4, and 5 via a flux-growth synthesis. All compounds crystallize in the same space group of orthorhombic Cmcm with cell constants: Mn GdInS (1), a = 3.789(1) Å, b = 12.411(1) Å, and c = 15.489(1) Å; Mn Gd S (2), a = 3.778(1) Å, b = 12.505(2) Å, and c = 19.114(2) Å; Mn Gd S (3), a = 3.769(1) Å, b = 12.466(2) Å, and c = 22.289(3) Å. Compounds 1-3 form a homologous series through the modulation of the MnS unit, whose structures represent a complete system of the corresponding lillianites ( L) of L, L and L. The gradually wider slabs formed in the series result in a monotonic increase along the c dimensions from 1 to 3. Crystal 3 is the first to achieve a predicted structure of L. Mn GdInS (1) displays a weak antiferromagnetic (AFM) ordering at 10 K and the Weiss constant (θ) of -0.76 K. Mn Gd In S (1a), an isostructure of 1, shifts the AFM transition temperature to 12 K and possesses a slightly larger θ constant of -6.06 K. Mn Gd S (3), featuring the thickest slabs in this series, shows a significant antiferromagnetic behavior beginning at a high temperature of 70 K and has a largest θ constant of -40.25 K. A small amount of impurity α-Gd S with an AFM transition temperature around 4 K was characterized in sample 3, which does not interfere with the magnetic ordering of 3 at much higher temperatures. These magnetic chalcogenides display band gaps of 1.66 eV for 1, 1.75 eV for 1a, and 1.44 eV for 3.