Abstract
We report the study of magnetotransport and magnetic properties of manganite oxides La1-xAxMnO3 (A = Ba, Ca). We have observed that polycrystalline manganite shows a different resistivity behavior from that of single crystalline material in that the former shows a small ρ P/ρ 5 K (ρ P: peak resistivity, ρ5 K: resistivity at 5 K) ratio and a large magnetoresistance (MR) effect at T ≪ TC, whereas the latter shows a large ρ P/ρ 5 K ratio and no significant MR at low temperature, due to grain boundary contribution to the resistivity. A La0.67Ba0.33MnO2.99 sample with a polycrystal size of 5 μm showed the grain boundary resistivity 150 times as large as the grain resistivity at 5 K. A possible origin of low-field MR in polycrystalline manganites has been discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 463-466 |
| Number of pages | 4 |
| Journal | Solid State Communications |
| Volume | 102 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1997 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Condensed Matter Physics
- Materials Chemistry
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Role of grain boundaries in double exchange manganite oxides La1-xAxMnO3 (A = Ba, Ca). / Ju, Honglyoul; Sohn, Hyunchul.
In: Solid State Communications, Vol. 102, No. 6, 01.01.1997, p. 463-466.Research output: Contribution to journal › Article
TY - JOUR
T1 - Role of grain boundaries in double exchange manganite oxides La1-xAxMnO3 (A = Ba, Ca)
AU - Ju, Honglyoul
AU - Sohn, Hyunchul
PY - 1997/1/1
Y1 - 1997/1/1
N2 - We report the study of magnetotransport and magnetic properties of manganite oxides La1-xAxMnO3 (A = Ba, Ca). We have observed that polycrystalline manganite shows a different resistivity behavior from that of single crystalline material in that the former shows a small ρ P/ρ 5 K (ρ P: peak resistivity, ρ5 K: resistivity at 5 K) ratio and a large magnetoresistance (MR) effect at T ≪ TC, whereas the latter shows a large ρ P/ρ 5 K ratio and no significant MR at low temperature, due to grain boundary contribution to the resistivity. A La0.67Ba0.33MnO2.99 sample with a polycrystal size of 5 μm showed the grain boundary resistivity 150 times as large as the grain resistivity at 5 K. A possible origin of low-field MR in polycrystalline manganites has been discussed.
AB - We report the study of magnetotransport and magnetic properties of manganite oxides La1-xAxMnO3 (A = Ba, Ca). We have observed that polycrystalline manganite shows a different resistivity behavior from that of single crystalline material in that the former shows a small ρ P/ρ 5 K (ρ P: peak resistivity, ρ5 K: resistivity at 5 K) ratio and a large magnetoresistance (MR) effect at T ≪ TC, whereas the latter shows a large ρ P/ρ 5 K ratio and no significant MR at low temperature, due to grain boundary contribution to the resistivity. A La0.67Ba0.33MnO2.99 sample with a polycrystal size of 5 μm showed the grain boundary resistivity 150 times as large as the grain resistivity at 5 K. A possible origin of low-field MR in polycrystalline manganites has been discussed.
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U2 - 10.1016/S0038-1098(97)00031-8
DO - 10.1016/S0038-1098(97)00031-8
M3 - Article
AN - SCOPUS:0031144916
VL - 102
SP - 463
EP - 466
JO - Solid State Communications
JF - Solid State Communications
SN - 0038-1098
IS - 6
ER -