This is a pretty common question here; here's some links from the FAQ:

http://www.reddit.com/r/AskHistorians/comments/1z88rb/how_accurate_are_stories_about_nazi_occultism/

http://www.reddit.com/r/AskHistorians/comments/1djs5u/to_what_extent_did_pseudoscience_and_occultism/

and a few others that have been posted over the years:

http://www.reddit.com/r/AskHistorians/comments/w2gt9/how_heavily_involved_with_the_occult_and_a_search/

http://www.reddit.com/r/AskHistorians/comments/2ga8l4/theres_many_stories_ive_heard_about_the_nazis/

http://www.reddit.com/r/AskHistorians/comments/1emq59/were_the_nazis_really_as_interested_in_the_occult/

Most posts agree that it is largely a post-war pop phenomenon with fairly little evidence to support it.