Journal Article

PreJuSER-8842

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Complex magnetic phases in LuFe2O4

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

2010
Elsevier Science New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.ssc.2009.11.030

Abstract: DC magnetization and AC susceptibility measurements on LuFe2O4 single crystals reveal a ferrimagnetic transition at 240 K followed by additional magnetic transitions at 225 K and 170 K, separating cluster glass phases, and a kinetically arrested state below 55 K. The origin of giant magnetic coercivity is attributed to the collective freezing of ferrimagnetic clusters and enhanced domain wall pinning associated with a structural transition at 170 K. Magnetocaloric effect measurements provide additional vital information about the multiple magnetic transitions and the glassy states. Our results lead to the emergence of a complex magnetic phase diagram in LuFe2O4. (C) 2009 Elsevier Ltd. All rights reserved.

Keyword(s): J ; Magnetic oxide (auto) ; Cluster glass (auto) ; Magnetocaloric effect (auto) ; Magnetic susceptibility (auto)

Note: The work at USF was supported by DOE BES Physical Behavior of Materials Program through grant number DE-FG02-07ER46438. The research at ORNL was sponsored by the Division of Materials Sciences and Engineering, Office of Basic Energy Sciences, US Department of Energy.

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Contributing Institute(s):

1. Streumethoden (IFF-4)
2. Neutronenstreuung (IFF-5)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)
4. JCNS (Jülich Centre for Neutron Science JCNS (JCNS) ; JCNS)

Research Program(s):

1. BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung (P45)
2. Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) (P55)

Appears in the scientific report 2010

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