Short range spin correlations in the CMR material La{sub 1.4}Sr{sub 1.6}Mn{sub 2}O{sub 7}.
Conference
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OSTI ID:10687
The (La{sub 1{minus}} x Sr{sub x}){sub 3}Mn{sub 2}O{sub 7} compounds are layered materials that exhibit higher magneto-resistance than the corresponding 3D manganite perovskites. Quasi-elastic neutron scattering on a polycrystalline sample of La{sub 1.4}Sr{sub 1.6}Mn{sub 2}O{sub 7} shows that the spin fluctuation spectrum of the these layered CMR materials is qualitatively similar to those found in the perovskite manganites (La,Ca)MnO{sub 3}; their concentration, lifetime, and coherence length increase as T decreases to T{sub c}. Unlike the perovskites we find a lower spin-diffusion constant above T{sub c} of {approximately}5 meV {angstrom}{sup 2}.
- Research Organization:
- Argonne National Lab., IL (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10687
- Report Number(s):
- ANL/MSD/CP-95884
- Country of Publication:
- United States
- Language:
- English
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Effects of dynamic Jahn-Teller distortions by Raman spectroscopy in the layered CMR manganite La{sub 2{minus}2x}Sr{sub 1+2x}Mn{sub 2}O{sub 7}, x = 0.36
Technical Report
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Sun Nov 30 23:00:00 EST 1997
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OSTI ID:555577
Effects of Reduced Dimensionality on Spin Dynamics in the Layered Perovskite La{sub 1.4}Sr{sub 1.6}Mn{sub 2}O{sub 7}
Journal Article
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Sat Aug 01 00:00:00 EDT 1998
· Physical Review Letters
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OSTI ID:643591
Effects of dynamic Jahn-Teller distortions by Raman spectroscopy in the layered CMR manganite La{sub 2{minus}2x}Sr{sub 1+2x}Mn{sub 2}O{sub 7}, x = 0.36
Conference
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Mon Nov 30 23:00:00 EST 1998
·
OSTI ID:296765