Giant positive magnetoresistance in ferromagnetic manganites/silicon nanotips diode

Cheong-Wei Chong; Daniel Hsu; Wei Chao Chen; Chien Cheng Li; Jauyn Grace Lin; Li Chyong Chen; Kuei Hsien Chen; Yang Fang Chen

doi:10.1021/jp308823r

Giant positive magnetoresistance in ferromagnetic manganites/silicon nanotips diode

Cheong-Wei Chong, Daniel Hsu, Wei Chao Chen, Chien Cheng Li, Jauyn Grace Lin, Li Chyong Chen, Kuei Hsien Chen, Yang Fang Chen

物理學系

研究成果: Article › 同行評審

7 引文斯高帕斯（Scopus）

摘要

The current-voltage relations and magnetotransport properties of La _0.7Sr _0.3MnO ₃/Si-nanotips and La _0.7Sr _0.3MnO ₃/Si-film junctions are studied, revealing that their transport properties are dominated by various mechanisms depending on temperature and bias voltage. A giant positive magnetoresistance (PMR) of ∼200% is observed at 40 K in La _0.7Sr _0.3MnO ₃/Si-nanotips junction. The temperature dependence of resistance in the presence of magnetic field suggests the origin of giant PMR to be the strong electron-electron interaction and electron-magnon scattering. Interestingly, such behavior is not observed in regular La _0.7Sr _0.3MnO ₃/Si-film junction, implying that the coupling between spin and charge could be greatly enhanced at the interface of La _0.7Sr _0.3MnO ₃ and Si nanotips.

原文	English
頁（從 - 到）	21132-21137
頁數	6
期刊	Journal of Physical Chemistry C
卷	116
發行號	39
DOIs	https://doi.org/10.1021/jp308823r
出版狀態	Published - 2012 10月 4

All Science Journal Classification (ASJC) codes

電子、光磁材料
一般能源
物理與理論化學
表面、塗料和薄膜

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10.1021/jp308823r

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title = "Giant positive magnetoresistance in ferromagnetic manganites/silicon nanotips diode",

abstract = "The current-voltage relations and magnetotransport properties of La 0.7Sr 0.3MnO 3/Si-nanotips and La 0.7Sr 0.3MnO 3/Si-film junctions are studied, revealing that their transport properties are dominated by various mechanisms depending on temperature and bias voltage. A giant positive magnetoresistance (PMR) of ∼200% is observed at 40 K in La 0.7Sr 0.3MnO 3/Si-nanotips junction. The temperature dependence of resistance in the presence of magnetic field suggests the origin of giant PMR to be the strong electron-electron interaction and electron-magnon scattering. Interestingly, such behavior is not observed in regular La 0.7Sr 0.3MnO 3/Si-film junction, implying that the coupling between spin and charge could be greatly enhanced at the interface of La 0.7Sr 0.3MnO 3 and Si nanotips.",

author = "Cheong-Wei Chong and Daniel Hsu and Chen, {Wei Chao} and Li, {Chien Cheng} and Lin, {Jauyn Grace} and Chen, {Li Chyong} and Chen, {Kuei Hsien} and Chen, {Yang Fang}",

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T1 - Giant positive magnetoresistance in ferromagnetic manganites/silicon nanotips diode

AU - Chong, Cheong-Wei

AU - Hsu, Daniel

AU - Chen, Wei Chao

AU - Li, Chien Cheng

AU - Lin, Jauyn Grace

AU - Chen, Li Chyong

AU - Chen, Kuei Hsien

AU - Chen, Yang Fang

PY - 2012/10/4

Y1 - 2012/10/4

N2 - The current-voltage relations and magnetotransport properties of La 0.7Sr 0.3MnO 3/Si-nanotips and La 0.7Sr 0.3MnO 3/Si-film junctions are studied, revealing that their transport properties are dominated by various mechanisms depending on temperature and bias voltage. A giant positive magnetoresistance (PMR) of ∼200% is observed at 40 K in La 0.7Sr 0.3MnO 3/Si-nanotips junction. The temperature dependence of resistance in the presence of magnetic field suggests the origin of giant PMR to be the strong electron-electron interaction and electron-magnon scattering. Interestingly, such behavior is not observed in regular La 0.7Sr 0.3MnO 3/Si-film junction, implying that the coupling between spin and charge could be greatly enhanced at the interface of La 0.7Sr 0.3MnO 3 and Si nanotips.

AB - The current-voltage relations and magnetotransport properties of La 0.7Sr 0.3MnO 3/Si-nanotips and La 0.7Sr 0.3MnO 3/Si-film junctions are studied, revealing that their transport properties are dominated by various mechanisms depending on temperature and bias voltage. A giant positive magnetoresistance (PMR) of ∼200% is observed at 40 K in La 0.7Sr 0.3MnO 3/Si-nanotips junction. The temperature dependence of resistance in the presence of magnetic field suggests the origin of giant PMR to be the strong electron-electron interaction and electron-magnon scattering. Interestingly, such behavior is not observed in regular La 0.7Sr 0.3MnO 3/Si-film junction, implying that the coupling between spin and charge could be greatly enhanced at the interface of La 0.7Sr 0.3MnO 3 and Si nanotips.

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JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

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ER -

Giant positive magnetoresistance in ferromagnetic manganites/silicon nanotips diode

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