Price, D.J., Lionti, F., Ballou, R., Wood, P.T., and Powell, A.K. (1999) Large metal clusters and lattices with analogues to biology. Royal Society of London Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, 357 (1762). pp. 3089-3118. ISSN 1364-503X (doi:10.1098/rsta.1999.0483)
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The magnetic properties of two types of material derived from the brucite lattice, M(OH)2 are described. The structure-directing effects of simple templates on the brucite lattice parallels the processes seen in nature in formation of biominerals. The first type exemplified by Fe17/Fe19 aggregates models the structural features of the iron storage protein ferritin. The magnetic behaviour also reveals some interesting parallels with the magnetic phenomena reported previously on ferritins.We have used a combination of experimental techniques including DC, AC and RF susceptibility measurements on powders and a microSQUID on single crystals. The second type is based on an extended-defect brucite structure with stoichiometry M2(OH)2(ox) for M = Fe2+, Co2+. They show long-range ordering to antiferromagnetic phases and then, at much lower temperatures, undergo a phase transition to canted antiferromagnetic states. Symmetry arguments are used to predict the spin configurations in these extended materials.
|Glasgow Author(s):||Price, Dr Daniel|
|Authors:||Price, D.J., Lionti, F., Ballou, R., Wood, P.T., and Powell, A.K.|
|College/School:||College of Science and Engineering > School of Chemistry|
|Journal Name:||Royal Society of London Philosophical Transactions A: Mathematical, Physical and Engineering Sciences|
|Journal Abbr.:||Phil. Trans. R. Soc. Lond. A|