Ferromagnetism in Sr{sub 4}Ru{sub 3}O{sub 10}: Relationship to other layered metallic oxides
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310 (United States)
- Physics Department, Tufts University, Medford, Massachusetts 02155 (United States)
Single crystals of Sr{sub 4}Ru{sub 3}O{sub 10}, the n=3 member of the Ruddlesden-Popper series Sr{sub n+1}Ru{sub n}O{sub 3n+1}, have been found to be ferromagnetic for T{lt}T{sub C}=148 K. Measurements of the magnetization for 2{lt}T{lt}350 K, and in fields H to 30 T, electrical resistivity for 2{lt}T{lt}300 K and 0{lt}H{lt}12 T, and heat capacity for 2{lt}T{lt}20 K reveal that the magnetic, transport, and thermal properties are consistent with those of n=1, 2, and {infinity} members of the series. Low-field (H=0.01 T) magnetization shows a sharp ferromagnetic transition at T{sub C}, and isothermal magnetization for T{lt}T{sub C} reveals some hysteresis, but magnetic saturation occurs only for H{gt}16 T. The easy axis for magnetization lies in the ab plane. The saturation value, 1.75{mu}{sub B}/Ru is consistent with that expected for the low-spin state for the Ru 4d{sup 4} configuration. The resistivity shows a Fisher-Langer-type anomaly at T{sub C} that is suppressed for fields of a few T. The heat capacity measures a large electronic component, {gamma}=110 mJ/moleK{sup 2}, suggesting a highly correlated d band, but similar to the n=1, 2, and {infinity} members of the series when normalized to the number of Ru-O layers in the repeated structure. The data are discussed in terms of the other members of the Sr{sub n+1}Ru{sub n}O{sub 3n+1} series and of analogous properties for the Ca-based counterpart materials. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 542259
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 56, Issue 10; Other Information: PBD: Sep 1997
- Country of Publication:
- United States
- Language:
- English
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