Two-dimensional intrinsic and extrinsic ferromagnetic behavior of layered La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7} single crystals

Journal Article · Thu Jan 01 00:00:00 EST 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.57.72· OSTI ID:565870

Potter, C D; Swiatek, M; Bader, S D ^[1]; Argyriou, D N ^[2]; Mitchell, J F; Miller, D J; Hinks, D G; Jorgensen, J D ^[3]

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1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Science and Technology Center for Superconductivity, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. Materials Science Division and Science and Technology Center for Superconductivity, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

The low-field magnetization M and susceptibility {chi} are reported for the two-layered Ruddleson-Popper phase SrO(La{sub 1{minus}x}Sr{sub x}MnO{sub 3}){sub 2} for x=0.4 (denoted La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7}) with an in-plane magnetic easy axis. As T approaches the Curie temperature ( T{sub C}=116 K) on cooling, where the metal-insulator transition occurs in zero field, {chi} diverges as H{sup {minus}1/{delta}{sup {prime}}}, with {delta}=21{plus_minus}5. Also, near an extrinsic Curie transition attributed to {approximately}0.1{percent} volume fraction of intergrowths at T{sup {asterisk}}=2.47 T{sub C}, M scales as (1{minus}T/T){sup {beta}}, with {beta}=0.25{plus_minus}0.02. These results can be understood within the context of two-dimensional XY models, and provide some perspective of the layered manganites. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 565870
• Journal Information: Physical Review, B: Condensed Matter, Vol. 57, Issue 1; Other Information: PBD: Jan 1998
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CURIE POINT
LANTHANUM OXIDES
STRONTIUM OXIDES
MANGANESE OXIDES
FERROMAGNETISM
MAGNETIZATION
MAGNETIC SUSCEPTIBILITY
LAYERS