Complex magnetic phases in LuFe2O4

Journal Article · Fri Jan 01 00:00:00 EST 2010 · Solid State Communications

DOI:https://doi.org/10.1016/j.ssc.2009.11.030· OSTI ID:988744

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

---

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

DC magnetization and AC susceptibility measurements on LuFe{sub 2}O{sub 4} 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 LuFe{sub 2}O{sub 4}.

• 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: 988744
• Journal Information: Solid State Communications, Vol. 150, Issue 7-8; ISSN 0038-1098
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LUTETIUM OXIDES
IRON OXIDES
MAGNETIC PROPERTIES
PHASE TRANSFORMATIONS
MONOCRYSTALS
PHASE DIAGRAMS