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Science 8 November 1996:
Vol. 274. no. 5289, pp. 938 - 939
DOI: 10.1126/science.274.5289.938
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Perspectives

Eugene M. Chudnovsky

Magnetic materials normally exhibit a smooth response to external fields, but recent experiments reported in Physical Review Letters yield stepwise response curves. In his Perspective, Chudnovsky discusses the results, which may be evidence for quantum behavior on a macroscopic scale.

The author is in the Physics Department, City University of New York Lehman College, Bronx, NY 10468-1589, USA. E-mail: chudnov{at}lcvax.lehman.cuny.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)