As of 2007, superannuation laws changed, and a SMSF is allowed to borrow money to purchase an investment asset, however there a strict guidelines to follow when borrowing.
The type of investment assets that can be purchase are:
Residential and commercial property
Shares
Managed funds
There are limitations that apply to purchasing assets from related parties in SMSFs, you should seek assistance from profession SMSF accountants to see if the asset you are purchasing could potentially breach the related party rules.