Magnetism and Cluster Glass Dynamics in Geometrically Frustrated LuFe2O4

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3074507· OSTI ID:1026751

Phan, M. ^[1]; Frey, N. A. ^[1]; Srikanth, H. ^[1]; Angst, M ^[2]; Sales, Brian C ^[3]; Mandrus, David ^[3]

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1. University of South Florida, Tampa
2. Institut fur Festkorperforschung
3. ORNL

We report on the magnetic properties of high quality LuFe{sub 2}O{sub 4} single crystals grown by the floating zone method. dc and ac susceptibility measurements and analysis reveal a ferrimagnetic transition at -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 ('{double_prime}) 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}{sub o}(T{sub f}/T{sub g}-1){sup -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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1026751
• Journal Information: Journal of Applied Physics, Vol. 105, Issue 7; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONFIGURATION
FREQUENCY DEPENDENCE
GLASS
IRON OXIDES
MAGNETIC PROPERTIES
MAGNETISM
MONOCRYSTALS
SPIN