The former Deportivo La Coruna defender told Newcastle's website: "I'm very excited to be here and it is a dream to play for such a big club in the Premier League.
"I have known about Newcastle's interest for a while and I wanted to sign because it is a club I know all about from my time watching English football in Spain and Argentina."
And, when asked what type of player the fans can expect to see, Fabricio had this message for the Toon Army: "I'm a defender who will always try my best for the team.
"I think I am a good technical player and I will be suited to the speed and physical side of the game in England.
"I am also still fit because I was doing pre-season training with Deportivo and I can't wait to get started."