TY - JOUR
T1 - Magnetic properties of a metal-organic antiferromagnet Mn(hfipbb)py(H 2O) 0.5
AU - Yuen, Tan
AU - Lin, C. L.
AU - Pan, Long
AU - Huang, Xiaoying
AU - Li, Jing
N1 - Funding Information:
Two of the authors (T.Y.) and (C.L.) acknowledge the support from Temple University through GIA program. Three of the authors (L.P.), (X.Y.H.), and (J.L.) would like to acknowledge the partial support from the National Science Foundation via Grant No. DMR-0422932.
PY - 2006
Y1 - 2006
N2 - Mn (hfipbb) py (H2 O)0.5 [H2 hfipbb=4, 4′ -(hexafluoroisopropylidene) bis(benzoic acid), py=pyridine] is a recently discovered metal-organic coordination network. The crystal structure of this compound belongs to a triclinic space group P-1, and the lattice parameters are a=12.988 Å, b=13.296 Å, c=14.644 Å, α=115.13°, Β=95.61°, and γ=101.03°. Two crystallographically independent Mn atoms (Mn1 and Mn2) exist in this structure, and an alternate connection (-Mn1-Mn2-Mn1-Mn2-) through organic units along the x axis leads to a one-dimensional Mn2+ chain. Magnetic susceptibility M (T) H and isothermal magnetization M (H) were measured on single-crystal samples, as well as on powder samples of Mn (hfipbb) py (H2 O)0.5. Antiferromagnetic ordering was observed below a transition temperature of TN =9.0 K. High-temperature susceptibility data for powder samples were fitted to the Curie-Weiss law with θ=-30 K and an effective moment of μeff =5.7 μB, close to what is expected for a free Mn2+ ion. There is small but clear orientation dependence in the susceptibility data for single-crystal samples. The result of isothermal magnetization measured at 2 K is consistent with the interpretation of an antiferromagnetic ground state, and a slope change was seen at a critical field of Hc =18 kG, indicating a field-induced moment reorientation of the Mn2+ ions in this compound.
AB - Mn (hfipbb) py (H2 O)0.5 [H2 hfipbb=4, 4′ -(hexafluoroisopropylidene) bis(benzoic acid), py=pyridine] is a recently discovered metal-organic coordination network. The crystal structure of this compound belongs to a triclinic space group P-1, and the lattice parameters are a=12.988 Å, b=13.296 Å, c=14.644 Å, α=115.13°, Β=95.61°, and γ=101.03°. Two crystallographically independent Mn atoms (Mn1 and Mn2) exist in this structure, and an alternate connection (-Mn1-Mn2-Mn1-Mn2-) through organic units along the x axis leads to a one-dimensional Mn2+ chain. Magnetic susceptibility M (T) H and isothermal magnetization M (H) were measured on single-crystal samples, as well as on powder samples of Mn (hfipbb) py (H2 O)0.5. Antiferromagnetic ordering was observed below a transition temperature of TN =9.0 K. High-temperature susceptibility data for powder samples were fitted to the Curie-Weiss law with θ=-30 K and an effective moment of μeff =5.7 μB, close to what is expected for a free Mn2+ ion. There is small but clear orientation dependence in the susceptibility data for single-crystal samples. The result of isothermal magnetization measured at 2 K is consistent with the interpretation of an antiferromagnetic ground state, and a slope change was seen at a critical field of Hc =18 kG, indicating a field-induced moment reorientation of the Mn2+ ions in this compound.
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U2 - 10.1063/1.2159307
DO - 10.1063/1.2159307
M3 - Article
AN - SCOPUS:33646756598
VL - 99
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 8
M1 - 08J501
ER -