TY - JOUR
T1 - Hematite-ilmenite (Fe2O3-FeTiO3) solid solutions
T2 - determinations of Fe-Ti order from magnetic properties
AU - Brown, N. E.
AU - Navrotsky, A.
AU - Nord, G. L.
AU - Banerjee, S. K.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1993
Y1 - 1993
N2 - The saturation magnetization, Ms(T), of samples with compositions spanning the ilmenite-hematite solid solution series has been measured at temperatures from 77 to 298 K. These data have been used to extrapolate to the saturation magnetization at 0 K. The saturation magnetization at 0 K is directly related to the distribution of Fe3+, Fe2+, and Ti4+ between the A and B sublattices of the ilmenite structure and can, therefore, be used to determine the order parameter, QMs, for each composition and annealing temperature. High coercivities exhibited by samples with composition xilm = 0.6 and xilm = 0.7 are related to the development of high TDB surface areas and short-range ordering. With subsequent annealing below the order-disorder transition, coercivities are drastically reduced. -from Authors
AB - The saturation magnetization, Ms(T), of samples with compositions spanning the ilmenite-hematite solid solution series has been measured at temperatures from 77 to 298 K. These data have been used to extrapolate to the saturation magnetization at 0 K. The saturation magnetization at 0 K is directly related to the distribution of Fe3+, Fe2+, and Ti4+ between the A and B sublattices of the ilmenite structure and can, therefore, be used to determine the order parameter, QMs, for each composition and annealing temperature. High coercivities exhibited by samples with composition xilm = 0.6 and xilm = 0.7 are related to the development of high TDB surface areas and short-range ordering. With subsequent annealing below the order-disorder transition, coercivities are drastically reduced. -from Authors
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M3 - Article
AN - SCOPUS:0027806754
SN - 0003-004X
VL - 78
SP - 941
EP - 951
JO - American Mineralogist
JF - American Mineralogist
IS - 9-10
ER -