Froch must defend the belt against mandatory challenger James DeGale by the end of January, but the Nottingham fighter, who also holds the WBA strap, has admitted that competing in Las Vegas is the main aim for the remainder of his career.
The 37-year-old is quoted by BBC Sport as saying: "I'm happy to vacate the IBF belt. This is about me pursuing a dream of boxing in Las Vegas. I don't want to retire without having fought in the fight capital of the world.
"The promoter of Chavez Jr has been in touch with my promoter and once that happens you are on the road to getting the fight made."
Froch's last two contests have seen him successfully defend his two world titles against George Groves.