Magnetic correlations in the bilayer manganite La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7}
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois60439 (United States)
- NIST Center for Neutron Research, National Institute for Standards and Technology, Gaithersburg, Maryland20899 (United States)
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois60439 (United States)
- Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, New Mexico87545 (United States)
Neutron scattering has been used to study the magnetic correlations in the double-layer manganite La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7}, which exhibits colossal magnetoresistance in the vicinity of the ferromagnetic transition at T{sub c}=112K. Over a large temperature range above T{sub c}, there is evidence for two-dimensional magnetic correlations which peak in intensity at the transition. Although the in-plane correlations are predominantly ferromagnetic, a strong canting of spins in neighboring planes within the bilayers, at an angle that is dependent on both the temperature and magnetic field, is observed. There are indications of a crossover to three-dimensional critical scattering very close to T{sub c}, but the nature of the phase transition has yet to be determined. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 624868
- Report Number(s):
- CONF-980102--
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 11 Vol. 83; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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