@article{articleaa53189f, title = {Two-photon absorption cross section of magnetite nanoparticles in magnetic colloids and thin films}, author = {Espinosa, Daniel Humberto Garcia and Goncalves, E. S. and Figueiredo Neto, Antônio Martins}, year = {2017}, doi = {10.1063/1.4974967}, journal = {JOURNAL OF APPLIED PHYSICS} }