I am currently finding a supervisor for an MSc program. It is incredibly difficult to get research experience as an undergraduate student (especially since I attend a large school with an incredible amount of competition). However, I make the best use of resources available to me. I have joined several organizations at school which are directly related to my masters program. As a member, I have researched and published several student papers (not in scientific journals). These papers are well written and researched (as they go through an extensive editing process) and demonstrate my passion. I will mention these projects in my emails / CV. However, in my emails, should I mention that these are "available upon request"?
As stated in comments, you should make the papers available to the potential supervisor online:
- Create yourself a basic webpage with a sensible address.
- List the papers, with full details and references.
- Link to the pages of the places they are published.
- If the copyright agreement allows, link also to a copy of the paper.
- Given the option, make this copy on the arXiv (get the supervisor from the paper to endorse you, assuming it's in their field).
- If you cannot use the arXiv, store the copies on the same website.
- Alternatively, your current institution may have an eprint system you can use.
- Make sure your co-authors are happy with this.
- Include the web address when you contact potential supervisors (if it is long, perhaps use a tinyurl with preview).
If you believe that these papers provide evidence of your abilities as a researcher, and you can make them available to a potential supervisor then I see no reason not to state that they are "available upon request". This way they can read them if they want to, but aren't being sent documents unsolicited.