There are these obscure movies called 'Thor', 'The Avengers', and 'Thor 2: the Dark World'. Try looking there.
Or, for a slightly less facetious reply: If by "magic" your asking for "not subject to scientific analysis or understanding", you are looking for something that doesn't exist, because *anything observable is subject to scientific analysis and understanding*. The fact that the Asgardians understand magic doesn't mean its not magic. The fact that Asgardians freely incorporate magic into their works of engineering does not mean its not magic. The fact that Asgardians don't run around drowning in superstition does not mean that it is not magic.
I don't think the Asgardians use magic. I think it is just science we don't understand. I'm not trying to argue, and we may just have two different interpretations, and that is fine. Here's an example from Thor.
Link:
http://www.imdb.com/title/tt0800369/quotes
Jane Foster: [about the mythology book] Where'd you find this?
Erik Selvig: The children's section. I just wanted to show you how silly his story was.
Jane Foster: But you're the one who's always pushing me to chase down every possibility, every alternative.
Erik Selvig: I'm talking about science, not magic.
Jane Foster: Well, "magic's just science we don't understand yet." Arthur C. Clarke.
Erik Selvig: Who wrote science-fiction.
Jane Foster: A precursor to science fact!
Erik Selvig: In some cases, yeah.
Jane Foster: Well, if there's an Einstein-Rosen bridge, then there's something on the other side. And advanced beings could have crossed it!
Erik Selvig: Oh, Jane.
Darcy: A primitive culture like the Vikings might have worshiped them as deities.
Jane Foster: Yes! Yes, exactly. Thank you.
Kevin Feige has pretty much stated as much:
Link:
http://screenrant.com/marvel-kevin-...2-3-thor-thanos-infinity-guantlet-gems-stones
Screenrant: How do you fit Thor and Ultron in one movie? This is a movie thats very cosmic and Ultron is a very technology based villain how do you kind of fit those two together?
Kevin Feige: Finding that balance has always been what that cinematic universe has been about. Iron Man is a very technological hero his movies are always technologically based. The first Thor was all about introducing Asgard and Thor in that more fantastical realm into the more reality-based MCU, and explain that obviously it might look like magic, but its another form of science and technology. As we go into Ultron clearly he does come out of technology, but we're using all of our tools at our disposal that we've established so far as part of the MCU to build the storyline of Age of Ultron.