Structure and Magnetic Behavior of Layered Honeycomb Tellurates, BiM(III)TeO6(M = Cr, Mn, Fe).
New layered honeycomb tellurates, BiM(III)TeO6(M = Cr, Mn, Fe) were synthesized and characterized. BiM(III)TeO6(M = Cr, Fe) species crystallize in a trigonal space group, P3̅1c (No. 163), of edge-sharing M3+/Te6+O6octahedra, which form honeycomb-like double layers in the ab plane with Bi3+cations located between the layers. Interestingly, the structure of BiMnTeO6is similar to those of the Cr/Fe analogues, but with monoclinic space group, P21/c (No. 14), attributed to the strong Jahn-Teller distortion of Mn3+cations. The crystal structure of BiM(III)TeO6is a superstructure of PbSb2O6-related materials (ABB'O6). The Cr3+and Fe3+cations are ordered 80% and 90%, respectively, while the Mn3+ions are completely ordered on the B-site of the ABB'O6structure. BiCrTeO6shows a broad antiferromagnetic transition (AFM) at ∼17 K with a Weiss temperature (θ) of -59.85 K, while BiFeTeO6and BiMnTeO6show sharp AFM transitions at ∼11 K with θ of -27.56 K and at ∼9.5 K with θ of -17.57 K, respectively. These differences in the magnetic behavior are ascribed to the different concentration of magnetic nearest versus next-nearest neighbor interactions of magnetic cations due to the relative differences in the extent of M/Te ordering.
Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854, United States.
Sun Woo
SW
Kim
Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854, United States.
Zheng
Z
Deng
Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854, United States.
Zachary
Z
Fischer
Advanced Photon Source, Argonne National Laboratory , Lemont, Illinois 60439, United States.
Saul H
SH
Lapidus
Department of Physics & Astronomy, State University of New York , Stony Brook, New York 11794, United States.
Peter W
PW
Stephens
Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854, United States.
Man-Rong
MR
Li
Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854, United States.
Martha
M
Greenblatt