High frequency impedance spectra on the chromium dioxide thin film

We report on the study of high frequency magnetotransport properties of the chromium dioxide (CrO2) thin films, grown on Si substrate using chemical vapor deposition. The film exhibits a ferromagnetic transition with a Curie temperature near 390 K. The temperature dependent spontaneous magnetization...

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Bibliographic Details
Published inJournal of applied physics Vol. 89; no. 11; pp. 7702 - 7704
Main Authors Fu, C. M., Lai, C. J., Wu, J. S., Huang, J. C. A., Wu, C.-C., Shyu, S.-G.
Format Journal Article
LanguageEnglish
Published United States The American Physical Society 01.06.2001
Subjects
CHEMICAL VAPOR DEPOSITION
CHROMIUM
CURIE POINT
DIELECTRIC MATERIALS
ELECTRODYNAMICS
IMPEDANCE
MAGNETIZATION
MATERIALS SCIENCE
RELAXATION
SPECTRA
SUBSTRATES
THIN FILMS
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Summary:We report on the study of high frequency magnetotransport properties of the chromium dioxide (CrO2) thin films, grown on Si substrate using chemical vapor deposition. The film exhibits a ferromagnetic transition with a Curie temperature near 390 K. The temperature dependent spontaneous magnetization follows Bloch’s law. The impedance spectra, being analyzed based on the fundamental electrodynamics, are demonstrated to be in a low-loss dielectric limit along with the occurrence of dielectric relaxation and magnetization response. The specific features of impedance spectra, distinct from the usual metallic ferromagnet, are attributed to the half metallic nature of CrO2. The results explore the possibility for high frequency device applications.
Bibliography:NONE
US
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1358352