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

Research output: Contribution to journalArticle

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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.

Original languageEnglish
Pages (from-to)406-413
Number of pages8
JournalChinese Journal of Physics
Volume41
Issue number4
Publication statusPublished - 2003 Aug

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grain boundaries
magnetic measurement
transport properties
magnetic properties
scattering
magnetic fields

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Liu, S. J., Juang, J. Y., Wu, K. H., Uen, T. M., Gou, Y. S., & Lin, J. Y. (2003). Grain-Boundary Magnetoresistance of CrO2 Films Grown on TiO 2-Buffered LaAlO3 Substrates. Chinese Journal of Physics, 41(4), 406-413.

Grain-Boundary Magnetoresistance of CrO2 Films Grown on TiO 2-Buffered LaAlO3 Substrates. / Liu, S. J.; Juang, J. Y.; Wu, K. H.; Uen, T. M.; Gou, Y. S.; Lin, J. Y.

In: Chinese Journal of Physics, Vol. 41, No. 4, 08.2003, p. 406-413.

Research output: Contribution to journalArticle

Liu, SJ, Juang, JY, Wu, KH, Uen, TM, Gou, YS & Lin, JY 2003, 'Grain-Boundary Magnetoresistance of CrO2 Films Grown on TiO 2-Buffered LaAlO3 Substrates', Chinese Journal of Physics, vol. 41, no. 4, pp. 406-413.
Liu, S. J. ; Juang, J. Y. ; Wu, K. H. ; Uen, T. M. ; Gou, Y. S. ; Lin, J. Y. / Grain-Boundary Magnetoresistance of CrO2 Films Grown on TiO 2-Buffered LaAlO3 Substrates. In: Chinese Journal of Physics. 2003 ; Vol. 41, No. 4. pp. 406-413.
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