Magnetism and cluster glass dynamics in geometrically frustrated LuFe2O4

Phan, M. H.; Frey, N. A.; Mandrus, D.; Srikanth, H.; Angst, M.; Sales, B. C.

doi:10.1063/1.3074507

Journal Article

Magnetism and cluster glass dynamics in geometrically frustrated LuFe2O4

Phan, M. H. ; Frey, N. A. ; Srikanth, H. ; Angst, M.FZJ* ; Sales, B. C. ; Mandrus, D.

2009
American Institute of Physics Melville, NY

Journal of applied physics 105, 07E308 (2009) [10.1063/1.3074507]

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Please use a persistent id in citations: http://hdl.handle.net/2128/17263 doi:10.1063/1.3074507

Abstract: We report on the magnetic properties of high quality LuFe2O4 single crystals grown by the floating zone method. dc and ac susceptibility measurements and analysis reveal a ferrimagnetic transition at similar to 240 K followed by a re-entrant cluster glass transition below 225 K, with an additional magnetic transition around 170 K. Strong frequency dependence of the real (chi') and imaginary (chi '') parts of the ac susceptibility observed at both these temperatures indicate glassy behavior and we quantitatively fit the data to a cluster glass model, tau = tau(o)(Tf/T-g-1)(-zv). Our studies show that these multiple transitions are consistent with the picture of ferrimagnetic clusters in the iron oxide planes with triangular lattice configuration favoring spin frustration and glass dynamics. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3074507]

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