Enhanced room-temperature magnetoresistance in partially melted La0.67Ca0.33MnO3 manganites

A. K. Pradhan; B. K. Roul; J. G. Wen; Z. F. Ren; M. Muralidhar; P. Dutta; D. R. Sahu; S. Mohanty; P. K. Patro

doi:10.1063/1.125887

Enhanced room-temperature magnetoresistance in partially melted La_0.67Ca_0.33MnO₃ manganites

A. K. Pradhan, B. K. Roul, J. G. Wen, Z. F. Ren, M. Muralidhar, P. Dutta, D. R. Sahu, S. Mohanty, P. K. Patro

研究成果: Article › 査読

37 被引用数 (Scopus)

抄録

We have performed magnetic and transport measurements on La_0.67Ca_0.33MnO₃ polycrystalline and partially melted samples. The magnetization and resistance decrease as sintering temperature is increased. The insulator-to-metal transition temperature is remarkably enhanced in the partially melted sample, enabling its possible applications at room temperature. The microscopic studies in melt samples show an excellent connectivity between grains, suggesting the enhancement of percolative transport by opening new conduction channels and the disappearance of magnetic phase boundary at elevated temperature by the ordering of Mn spins blocked at the grain boundary of sintered samples.

本文言語	English
ページ（範囲）	763-765
ページ数	3
ジャーナル	Applied Physics Letters
巻	76
号	6
DOI	https://doi.org/10.1063/1.125887
出版ステータス	Published - 2000 2月 7
外部発表	はい

ASJC Scopus subject areas

物理学および天文学（その他）

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10.1063/1.125887

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引用スタイル

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AU - Pradhan, A. K.

AU - Roul, B. K.

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AU - Ren, Z. F.

AU - Muralidhar, M.

AU - Dutta, P.

AU - Sahu, D. R.

AU - Mohanty, S.

AU - Patro, P. K.

PY - 2000/2/7

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N2 - We have performed magnetic and transport measurements on La0.67Ca0.33MnO3 polycrystalline and partially melted samples. The magnetization and resistance decrease as sintering temperature is increased. The insulator-to-metal transition temperature is remarkably enhanced in the partially melted sample, enabling its possible applications at room temperature. The microscopic studies in melt samples show an excellent connectivity between grains, suggesting the enhancement of percolative transport by opening new conduction channels and the disappearance of magnetic phase boundary at elevated temperature by the ordering of Mn spins blocked at the grain boundary of sintered samples.

AB - We have performed magnetic and transport measurements on La0.67Ca0.33MnO3 polycrystalline and partially melted samples. The magnetization and resistance decrease as sintering temperature is increased. The insulator-to-metal transition temperature is remarkably enhanced in the partially melted sample, enabling its possible applications at room temperature. The microscopic studies in melt samples show an excellent connectivity between grains, suggesting the enhancement of percolative transport by opening new conduction channels and the disappearance of magnetic phase boundary at elevated temperature by the ordering of Mn spins blocked at the grain boundary of sintered samples.

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