ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The realization of spin polarized tunnel devices made with CrO2, a theorized half-metallic ferromagnet, requires stringent control of surface and interface quality ideally obtainable via molecular beam epitaxy (MBE) growth. We have studied the MBE growth of all the di- and tri-oxides of the group VIB transition metals (Cr, Mo, and W), with the aid of a high flux atomic oxygen source and detection scheme, to help understand which oxidation states are reachable. We find that even though we can reach the +6 oxidation state of Cr (CrO3) we are unable to obtain single phase CrO2, the +4 oxidation state. One interpretation of our results is that the physical effect of pressure, not solely the oxidation potential, is important to the growth of single phase CrO2. © 2001 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1355286
