Anomalous Hall effect in Gd-doped La₂₃Ca₁₃MnO₃ [electronic resource]
Ceramic samples of (La{sub 1-x}Gdₓ)₂₃Ca₁₃MnO₃ were prepared and used as targets to grow films onto LaAlO₃ substrates by pulsed laser deposition. Electrical resistance and thermopower, measured vs temperature and applied magnetic fields indicate transport dominated by positive small polarons in the h...
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Online Access |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Dept. of Energy. Office of Energy Research ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1996.
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| Summary: | Ceramic samples of (La{sub 1-x}Gdₓ)₂₃Ca₁₃MnO₃ were prepared and used as targets to grow films onto LaAlO₃ substrates by pulsed laser deposition. Electrical resistance and thermopower, measured vs temperature and applied magnetic fields indicate transport dominated by positive small polarons in the high temperature paramagnetic state. The Hall effect was measured in 0.5 μm thick films of composition x=0 and x=0.25. No evidence for extraordinary hall effect was found in the paramagnetic regime. Instead, the magnitude of the Hall coefficient decreases exponentially with temperature. This behavior and its anomalous negative sign are interpreted to result from face-diagonal hopping of small polarons in the Mn sublattice. |
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| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 10/01/1996. "sand--96-2793c" " conf-961141--6" "DE97001312" 41. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 12-15 Nov 1996. Salamon, M.B.; Emin, D.; Rubinstein, M.; Dorsey, P.; Jaime, M.; Hardner, H. |
| Physical Description: | 10 p. : digital, PDF file. |