Scientists enhance synthesis of chromium dioxide (100) epitaxial thin film growth

Aug 08, 2014
Temperature dependence of the resistivity of CrO2 film from 0.6–300 K. The solid line is the fitting result using ρ(T)=ρ0+AT2exp(-△/T). The inset is the enlarged part at low temperature; (b) A detailed comparison of fits at low temperature.

Half-metallic ferromagnet CrO2 has attracted much attention not only because of its fundamental physics related with high spin polarization but also because of its possible applications in the emerging area of spintronics.

In these applications, synthesis of CrO2 films is of fundamental importance, primarily because of the difficulty in its synthesis, as it is not known to form under ambient pressures in a pure form. Extensive efforts have been made to grow high quality CrO2 films, but the growth technology still deserves research.

The high quality CrO2 film on the (100)-oriented TiO2 substrate has been successfully fabricated using a simple route under ambient pressures in a pure form and the transport properties and the magnetic properties were also studied.

The high quality of the sample is indicated by the XRD patterns with the narrow width of 0.38o in the rocking curve of the (200) peak. The temperature dependence of resistivity can be fitted with ρ(T)=ρ0+AT2exp(-Δ/T) over the range of 0.6-300 K. The in-plane magnetic measurements show that the magnetization of the film becomes saturated in a relatively low field with a small coercive field. The of the magnetization follows Bloch's T3/2 law and the slope suggests a critical wavelength of λΔ ~ 26.6 Å beyond which spin-flip scattering becomes important.

Explore further: First thin films of spin ice reveal cold secrets

More information: www.worldscientific.com/doi/pd… 42/S0218625X14500553

add to favorites email to friend print save as pdf

Related Stories

First thin films of spin ice reveal cold secrets

Mar 12, 2014

Thin films of spin ice have been shown to demonstrate surprising properties which could help in the development of applications of magnetricity, the magnetic equivalent of electricity.

Magnetic switch gets closer to application

Jan 27, 2014

Scientists from Paris, Newcastle and Helmholtz-Zentrum Berlin have been able to switch on and off robust ferromagnetism close to room temperature by using low electric fields. Their results are inspiring ...

Recommended for you

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.