Abstract
This paper presents an investigation on the magnetoresistance properties of the polycrystalline manganite oxides, La 0.7-x Nd x Pb 0.3MnO 3 (x=0.0, 0.1, 0.5 and 0.7). We demonstrate that the magnetoresistance ratio is enhanced with the increase of Nd content due to the suppression of spin scattering in the presence of an applied magnetic field. We find that the magnetoresistance shows an increase with decreasing temperatures at low temperatures. These features have been conventionally attributed to spin-polarized tunneling at grain boundaries. The temperature dependence of the magnetoresistance can be described quite well by an expression of the type a+b/(T+c). At high temperatures the magnetoresistance ratio increases with increasing temperature and the resistivity shows the existence of the variable range hopping with Coulomb effects for x=0.5 and 0.7.
| Original language | English |
|---|---|
| Pages (from-to) | 949-951 |
| Number of pages | 3 |
| Journal | Journal of Superconductivity and Novel Magnetism |
| Volume | 23 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2010 Aug 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Influence of Nd doping on the magnetoresistance of La 0.7-x Nd x Pb 0.3MnO 3 . / Lin, C. H.; Young, S. L.; Chen, H. Z.; Kao, M. C.; Horng, Lance; Ou, C. R.
In: Journal of Superconductivity and Novel Magnetism, Vol. 23, No. 6, 01.08.2010, p. 949-951.Research output: Contribution to journal › Article
TY - JOUR
T1 - Influence of Nd doping on the magnetoresistance of La 0.7-x Nd x Pb 0.3MnO 3
AU - Lin, C. H.
AU - Young, S. L.
AU - Chen, H. Z.
AU - Kao, M. C.
AU - Horng, Lance
AU - Ou, C. R.
PY - 2010/8/1
Y1 - 2010/8/1
N2 - This paper presents an investigation on the magnetoresistance properties of the polycrystalline manganite oxides, La 0.7-x Nd x Pb 0.3MnO 3 (x=0.0, 0.1, 0.5 and 0.7). We demonstrate that the magnetoresistance ratio is enhanced with the increase of Nd content due to the suppression of spin scattering in the presence of an applied magnetic field. We find that the magnetoresistance shows an increase with decreasing temperatures at low temperatures. These features have been conventionally attributed to spin-polarized tunneling at grain boundaries. The temperature dependence of the magnetoresistance can be described quite well by an expression of the type a+b/(T+c). At high temperatures the magnetoresistance ratio increases with increasing temperature and the resistivity shows the existence of the variable range hopping with Coulomb effects for x=0.5 and 0.7.
AB - This paper presents an investigation on the magnetoresistance properties of the polycrystalline manganite oxides, La 0.7-x Nd x Pb 0.3MnO 3 (x=0.0, 0.1, 0.5 and 0.7). We demonstrate that the magnetoresistance ratio is enhanced with the increase of Nd content due to the suppression of spin scattering in the presence of an applied magnetic field. We find that the magnetoresistance shows an increase with decreasing temperatures at low temperatures. These features have been conventionally attributed to spin-polarized tunneling at grain boundaries. The temperature dependence of the magnetoresistance can be described quite well by an expression of the type a+b/(T+c). At high temperatures the magnetoresistance ratio increases with increasing temperature and the resistivity shows the existence of the variable range hopping with Coulomb effects for x=0.5 and 0.7.
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U2 - 10.1007/s10948-010-0668-1
DO - 10.1007/s10948-010-0668-1
M3 - Article
VL - 23
SP - 949
EP - 951
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
SN - 1557-1939
IS - 6
ER -