Grain-Boundary Magnetoresistance of CrO2 Films Grown on TiO 2-Buffered LaAlO3 Substrates

S. J. Liu; J. Y. Juang; K. H. Wu; T. M. Uen; Y. S. Gou; J. Y. Lin

Grain-Boundary Magnetoresistance of CrO₂ Films Grown on TiO ₂-Buffered LaAlO₃ Substrates

S. J. Liu^*, J. Y. Juang, K. H. Wu, T. M. Uen, Y. S. Gou, J. Y. Lin

^*此作品的通信作者

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

5 引文斯高帕斯（Scopus）

摘要

The magnetic and magnetotransport properties of predominantly (110)-oriented CrO₂ films grown on TiO₂-buffered LaAlO₃ substrates were investigated. The atomic force microscopic images revealed that the as-grown CrO₂ films are granular. The magnetic measurements indicated that in-plane coercive fields are about 60 Oe and 100 Oe at 300 K and 7 K, respectively. The as-grown films are semiconductive below 75 K; a magnetoresistance with a ΔR/R₀ ratio of -13 % in a magnetic field of 5 T was observed at 5 K, which is absent in high-quality epitaxial films. The coincidence between the coercive field and the peaks of the magnetoresistive loop measured at low temperatures indicates that spin-dependent scattering plays a crucial role in the transport properties.

原文	英語
頁（從 - 到）	406-413
頁數	8
期刊	Chinese Journal of Physics
卷	41
發行號	4
出版狀態	已發佈 - 2003 8月
對外發佈	是

ASJC Scopus subject areas

一般物理與天文學

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title = "Grain-Boundary Magnetoresistance of CrO2 Films Grown on TiO 2-Buffered LaAlO3 Substrates",

abstract = "The magnetic and magnetotransport properties of predominantly (110)-oriented CrO2 films grown on TiO2-buffered LaAlO3 substrates were investigated. The atomic force microscopic images revealed that the as-grown CrO2 films are granular. The magnetic measurements indicated that in-plane coercive fields are about 60 Oe and 100 Oe at 300 K and 7 K, respectively. The as-grown films are semiconductive below 75 K; a magnetoresistance with a ΔR/R0 ratio of -13 % in a magnetic field of 5 T was observed at 5 K, which is absent in high-quality epitaxial films. The coincidence between the coercive field and the peaks of the magnetoresistive loop measured at low temperatures indicates that spin-dependent scattering plays a crucial role in the transport properties.",

author = "Liu, {S. J.} and Juang, {J. Y.} and Wu, {K. H.} and Uen, {T. M.} and Gou, {Y. S.} and Lin, {J. Y.}",

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month = aug,

language = "English",

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pages = "406--413",

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T1 - Grain-Boundary Magnetoresistance of CrO2 Films Grown on TiO 2-Buffered LaAlO3 Substrates

AU - Liu, S. J.

AU - Juang, J. Y.

AU - Wu, K. H.

AU - Uen, T. M.

AU - Gou, Y. S.

AU - Lin, J. Y.

PY - 2003/8

Y1 - 2003/8

N2 - The magnetic and magnetotransport properties of predominantly (110)-oriented CrO2 films grown on TiO2-buffered LaAlO3 substrates were investigated. The atomic force microscopic images revealed that the as-grown CrO2 films are granular. The magnetic measurements indicated that in-plane coercive fields are about 60 Oe and 100 Oe at 300 K and 7 K, respectively. The as-grown films are semiconductive below 75 K; a magnetoresistance with a ΔR/R0 ratio of -13 % in a magnetic field of 5 T was observed at 5 K, which is absent in high-quality epitaxial films. The coincidence between the coercive field and the peaks of the magnetoresistive loop measured at low temperatures indicates that spin-dependent scattering plays a crucial role in the transport properties.

AB - The magnetic and magnetotransport properties of predominantly (110)-oriented CrO2 films grown on TiO2-buffered LaAlO3 substrates were investigated. The atomic force microscopic images revealed that the as-grown CrO2 films are granular. The magnetic measurements indicated that in-plane coercive fields are about 60 Oe and 100 Oe at 300 K and 7 K, respectively. The as-grown films are semiconductive below 75 K; a magnetoresistance with a ΔR/R0 ratio of -13 % in a magnetic field of 5 T was observed at 5 K, which is absent in high-quality epitaxial films. The coincidence between the coercive field and the peaks of the magnetoresistive loop measured at low temperatures indicates that spin-dependent scattering plays a crucial role in the transport properties.

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Grain-Boundary Magnetoresistance of CrO2 Films Grown on TiO 2-Buffered LaAlO3 Substrates

摘要

ASJC Scopus subject areas

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Grain-Boundary Magnetoresistance of CrO₂ Films Grown on TiO ₂-Buffered LaAlO₃ Substrates