A new 3 d transition-metal molybdate-tellurite(NH4)2 Co(TeMo2O9)2 was obtained through a conventional hydrothermal method.This compound was confirmed to crystallize in the monoclinic system of space group P2_(1)/c wit...A new 3 d transition-metal molybdate-tellurite(NH4)2 Co(TeMo2O9)2 was obtained through a conventional hydrothermal method.This compound was confirmed to crystallize in the monoclinic system of space group P2_(1)/c with a=10.5133(5),b=10.6456(5),c=7.6078(5)Å,β=108.879(6)o,V=805.66(8)Å^(3),Z=2,M_(r)=1021.97,Dc=4.213 g/cm^(3),μ=7.685 mm^(–1),F(000)=930,the final R=0.0399 and w R=0.1025 for 1580 observed reflections with I>2σ(I),showing a tunnel structure with spin triangle-lattice composed by CoO_(6) octahedra.Magnetic and heat capacity measurements confirmed a paramagnetic behavior down to 2 K with a negative Weiss temperature of–20 K,suggesting remarkable spin frustration in the system.展开更多
基金financially supported by the National Natural Science Foundation of China(NSFC,Nos.21573235,U1632159 and 21875249)。
文摘A new 3 d transition-metal molybdate-tellurite(NH4)2 Co(TeMo2O9)2 was obtained through a conventional hydrothermal method.This compound was confirmed to crystallize in the monoclinic system of space group P2_(1)/c with a=10.5133(5),b=10.6456(5),c=7.6078(5)Å,β=108.879(6)o,V=805.66(8)Å^(3),Z=2,M_(r)=1021.97,Dc=4.213 g/cm^(3),μ=7.685 mm^(–1),F(000)=930,the final R=0.0399 and w R=0.1025 for 1580 observed reflections with I>2σ(I),showing a tunnel structure with spin triangle-lattice composed by CoO_(6) octahedra.Magnetic and heat capacity measurements confirmed a paramagnetic behavior down to 2 K with a negative Weiss temperature of–20 K,suggesting remarkable spin frustration in the system.
