Neutron Scattering Investigation of Magnetic Bilayer Correlations in La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7} : Evidence of Canting above {ital T}{sub {ital C}}

Journal Article · Sat Oct 31 23:00:00 EST 1998 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.81.3964· OSTI ID:665572

Osborn, R; Rosenkranz, S; Sinha, S K; Mitchell, J F; Gray, K E; Bader, S D ^[1]; Argyriou, D N ^[2]; Vasiliu-Doloc, L; Lynn, J W ^[3]

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1. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Manual Lujan, Jr. Neutron Scattering Science Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. NIST Center for Neutron Research, National Institute of Science and Technology, Gaithersburg, Maryland 20899 (United States)

Neutron scattering investigations of the paramagnetic correlations in the layered manganite La{sub 1.2}Sr {sub 1.8}Mn{sub 2}O{sub 7} , which exhibits colossal magnetoresistance above the Curie transition at T{sub C}=112 K , show that spins in neighboring layers within each bilayer are strongly canted at an average angle that is dependent on both the magnetic field and the temperature, as predicted by de Gennes. The in-plane correlation length does not diverge at T{sub C} , although the magnetic Bragg intensity obeys critical scaling below T{sub C} , with the same temperature dependence as the zero-field electrical conductance. {copyright} {ital 1998} {ital The American Physical Society}

• DOE Contract Number: W-31109-ENG-38; W-7405-ENG-36
• OSTI ID: 665572
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 81; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
CURIE POINT
ELECTRIC CONDUCTIVITY
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETORESISTANCE
MANGANESE COMPOUNDS
MANGANESE OXIDES
NEUTRON DIFFRACTION
PARAMAGNETISM
SCALING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE