TY - JOUR
T1 - New phase of MnSb2O6 prepared by ion exchange
T2 - Structural, magnetic, and thermodynamic properties
AU - Nalbandyan, Vladimir B.
AU - Zvereva, Elena A.
AU - Nikulin, Alexey Yu
AU - Shukaev, Igor L.
AU - Whangbo, Myung Hwan
AU - Koo, Hyun Joo
AU - Abdel-Hafiez, Mahmoud
AU - Chen, Xiao Jia
AU - Koo, Changhyun
AU - Vasiliev, Alexander N.
AU - Klingeler, Rüdiger
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/2/16
Y1 - 2015/2/16
N2 - A new layered trigonal (P3¯1m) form of MnSb2O6, isostructural with MSb2O6 (M = Cd, Ca, Sr, Pb, and Ba) and MAs2O6 (M = Mn, Co, Ni, and Pd), was prepared by ion-exchange reaction between ilmenite-type NaSbO3 and MnSO4-KCl-KBr melt at 470 °C. It is characterized by Rietveld analysis of the X-ray diffraction pattern, electron microprobe analysis, magnetic susceptibility, specific heat, and ESR measurements as well as by density functional theory calculations. MnSb2O6 is very similar to MnAs2O6 in the temperature dependence of their magnetic susceptibility and spin exchange interactions. The magnetic susceptibility and specific heat data show that MnSb2O6 undergoes a long-range antiferromagnetic order with Néel temperature TN = 8.5(5) K. In addition, a weak ferromagnetic component appears below T1 = 41.5(5) K. DFT+U implies that the main spin exchange interactions are antiferromagnetic, thereby forming spin-frustrated triangles. The long-range ordered magnetic structure of MnSb2O6 is predicted to be incommensurate as found for MnAs2O6. On heating, the new phase transforms to the stable P321 form via its intermediate disordered variant.
AB - A new layered trigonal (P3¯1m) form of MnSb2O6, isostructural with MSb2O6 (M = Cd, Ca, Sr, Pb, and Ba) and MAs2O6 (M = Mn, Co, Ni, and Pd), was prepared by ion-exchange reaction between ilmenite-type NaSbO3 and MnSO4-KCl-KBr melt at 470 °C. It is characterized by Rietveld analysis of the X-ray diffraction pattern, electron microprobe analysis, magnetic susceptibility, specific heat, and ESR measurements as well as by density functional theory calculations. MnSb2O6 is very similar to MnAs2O6 in the temperature dependence of their magnetic susceptibility and spin exchange interactions. The magnetic susceptibility and specific heat data show that MnSb2O6 undergoes a long-range antiferromagnetic order with Néel temperature TN = 8.5(5) K. In addition, a weak ferromagnetic component appears below T1 = 41.5(5) K. DFT+U implies that the main spin exchange interactions are antiferromagnetic, thereby forming spin-frustrated triangles. The long-range ordered magnetic structure of MnSb2O6 is predicted to be incommensurate as found for MnAs2O6. On heating, the new phase transforms to the stable P321 form via its intermediate disordered variant.
UR - http://www.scopus.com/inward/record.url?scp=84923166266&partnerID=8YFLogxK
U2 - 10.1021/ic502666c
DO - 10.1021/ic502666c
M3 - Article
AN - SCOPUS:84923166266
SN - 0020-1669
VL - 54
SP - 1705
EP - 1711
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 4
ER -