52 citations
2 papers
math.AT2009
Matrix invariants of Spectral categories
Goncalo Tabuada
In this paper we pursue the study of spectral categories initiated in [26]. More precisely, we construct the Universal matrix invariant of spectral categories, i.e. a functor U wit…
cond-mat.mtrl-sci2008★ 52 cited
Magnetic properties of Co-doped TiO2 anatase nanopowders
L. C. J. Pereira, M. R. Nunes, O. C. Monteiro +1
This letter reports on the magnetic properties of Ti1-xCoxO2 anatase phase nanopowders with different Co contents. It is shown that oxygen vacancies play a fundamental role in prom…