You can use Library Search to find some articles on law but for a thorough search, it is recommended to use databases as some articles may not appear in Library Search (e.g. results from Westlaw). The following resources are the best sources for finding articles on law.
Three multidisciplinary databases: Arts & Humanities Citation Index (1975 - present), Social Sciences Citation index (1898 - present), and Science Citation Index (1970 - present). They index the core journals with details of articles, some with abstracts, but do not contain the full text of articles
Site offers a searchable database of published papers with abstracts and full bibliographic descriptions relating to the social sciences which are available for viewing or downloading. However, please note that some content may be locked and require a subscription.