Magnetic and high frequency properties of nanogranular CoFe-TiO{sub 2} films

Journal Article · Tue May 07 04:00:00 EDT 2013 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4795325· OSTI ID:22102387

Yicheng, Wang; Huaiwu, Zhang; Dandan, Wen; Zhiyong, Zhong; Feiming, Bai ^[1]

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1. State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054 (China)

A series of soft magnetic nanogranular CoFe-TiO{sub 2} films with different thicknesses were fabricated on Si substrates by co-sputtering CoFe and TiO{sub 2}, and the magnetic and high frequency properties were studied in details. X-ray diffraction analysis confirmed that the films were nanocrystalline/amorphous composites. A saturation magnetization as high as 21 kGs and a ferromagnetic resonance (FMR) frequency above 3 GHz were obtained. It was found that the coercivity decreased steeply with the increase of film thickness and its minimum value was about 6 Oe. In addition, the variations of FMR peak broadness of the imaginary part and damping factor were also presented and discussed as functions of film thickness.

• OSTI ID: 22102387
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 17 Vol. 113; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
COBALT ALLOYS
COBALT COMPOUNDS
COERCIVE FORCE
CRYSTALS
DAMPING
FERROMAGNETIC RESONANCE
FILMS
GRANULAR MATERIALS
IRON ALLOYS
IRON COMPOUNDS
MAGNETIC MATERIALS
MAGNETIZATION
NANOSTRUCTURES
SATURATION
SUBSTRATES
THICKNESS
TITANIUM OXIDES
X-RAY DIFFRACTION