The content you've requested is available without charge only to active Sigma Xi members and
If you are an active member or an individual subscriber, please log in now in order to access this article.
If you are not a member or individual subscriber, you can:
A 19th–century theorem of basic physics states that a static magnetic field cannot be arranged so as to levitate a magnet stably. Fiddle with a bunch of refrigerator magnets for as long as you like, and you'll never get one to hover in the air; position–sensing of the payload and active control of the supporting field is normally required for such levitation to work. But it turns out that one can stabilize magnetic levitation passively and automatically using diamagnetic materials. What is more, a diamagnetic material can itself be made to float stably in a properly arranged magnetic field. The principle of diamagnetic levitation, which has been known since the 1930s, is just now finding application in practical devices, such as precision sensors and small–scale transport systems.
Connect With Us:
An early peek at each new issue, with descriptions of feature articles, columns, and more. Every other issue contains links to everything in the latest issue's table of contents.
News of book reviews published in
and around the web, as well as other noteworthy happenings in the world of science books.
To sign up for automatic emails of the
American Scientist Update
issues, create an
, then sign up in the
My AmSci area
JSTOR, the online academic archive, contains complete back issues of American Scientist from 1913 (known then as the Sigma Xi Quarterly) through 2005.
The table of contents for each issue is freely available to all users; those with institutional access can read each complete issue.
View the full collection here.
Receive notification when new content is posted from the entire website, or choose from the customized feeds available.