Bulk and surface physical properties of a CrO2 thin film prepared from a Cr8 O21 precursor

K. Iwai, Yuji Muraoka, Takanori Wakita, M. Hirai, Takayoshi Yokoya, Y. Kato, T. Muro, Y. Tamenori

Research output: Contribution to journalArticle

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Abstract

We have prepared a CrO2 thin film by chemical vapor deposition from a Cr8 O21 precursor and studied the bulk and surface physical properties. The CrO2 thin film is grown on a TiO2 (100) substrate by heating of a Cr8 O21 precursor and TiO2 (100) substrate together in a sealed quartz tube. The prepared film is found from x-ray diffraction analysis to be an (100)-oriented single phase. The magnetization and resistivity measurements indicate that the film is a ferromagnetic metal with a Curie temperature of about 400 K. Cr 3s core-level and valence band photoelectron spectroscopy spectra reveal the presence of a metallic CrO2 in the surface region of the film. Our work indicates that preparation from a Cr8 O21 precursor is promising for obtaining a CrO2 thin film with the metallic surface.

Original languageEnglish
Article number043916
JournalJournal of Applied Physics
Volume108
Issue number4
DOIs
Publication statusPublished - Aug 15 2010

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physical properties
thin films
Curie temperature
x ray diffraction
quartz
photoelectron spectroscopy
vapor deposition
tubes
valence
magnetization
preparation
electrical resistivity
heating
metals

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Bulk and surface physical properties of a CrO2 thin film prepared from a Cr8 O21 precursor. / Iwai, K.; Muraoka, Yuji; Wakita, Takanori; Hirai, M.; Yokoya, Takayoshi; Kato, Y.; Muro, T.; Tamenori, Y.

In: Journal of Applied Physics, Vol. 108, No. 4, 043916, 15.08.2010.

Research output: Contribution to journalArticle

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AU - Iwai, K.

AU - Muraoka, Yuji

AU - Wakita, Takanori

AU - Hirai, M.

AU - Yokoya, Takayoshi

AU - Kato, Y.

AU - Muro, T.

AU - Tamenori, Y.

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AB - We have prepared a CrO2 thin film by chemical vapor deposition from a Cr8 O21 precursor and studied the bulk and surface physical properties. The CrO2 thin film is grown on a TiO2 (100) substrate by heating of a Cr8 O21 precursor and TiO2 (100) substrate together in a sealed quartz tube. The prepared film is found from x-ray diffraction analysis to be an (100)-oriented single phase. The magnetization and resistivity measurements indicate that the film is a ferromagnetic metal with a Curie temperature of about 400 K. Cr 3s core-level and valence band photoelectron spectroscopy spectra reveal the presence of a metallic CrO2 in the surface region of the film. Our work indicates that preparation from a Cr8 O21 precursor is promising for obtaining a CrO2 thin film with the metallic surface.

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