In order to make your publications freely accessible, you must have control over their copyright.
The author has the copyright and can make the publications freely accessible unless a specific agreement prohibiting it has been written. Parts of dissertations, report series, some local journals etc., belong to this group.
When your manuscript has been accepted for publishing in a journal (sometimes already in connection with electronic submitting), you receive a publishing agreement to sign.
Read the agreement closely, and make sure that you keep at least the right to parallel publish your accepted manuscript in the university’s open archive (alternatively in the publication database), as well as the right to use the article in a possible dissertation and in your teaching. Please feel free to read and use SPARC Author’s Addendum ((Scholarly Publishing and Academic Resources Coalition)
Keep track of your last "authors version of article" since many publishers accept publishing that version but not the publisher's pdf-file.
In this case the author might have limited/disclaimed his or her rights through an agreement. However, around 90 % of all journals still allow articles to be made freely accessible, provided that some conditions are met. You are welcome to contact us for more information on your publisher, or to search directly for information on whether you are allowed to parallel file your publication, without asking permission first.
>> Find Journal policies in SHERPA/Romeo
For books, some articles etc. you need permission from the publisher. Normally a letter will suffice. Mention
I am writing to ask for permission to self-archive a copy of my article [title of the article], published in [publication name, vol, issue, pages].
The copy will be archived in Luleå University of Technology Publications Database, http://pure.ltu.se/portal/en/, the freely available institutional repository at Luleå University of Technology