Phys. Rev. Lett. 87, 107001 (2001) [4 pages]Direct Observation of Spontaneous Weak Ferromagnetism in the Superconductor ErNi2B2C |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1984: |
S.-M. Choi * and J. W. Lynn
National Institute of Standards and Technology, Gaithersburg, Maryland 20899
and University of Maryland, College Park, Maryland 20742
D. Lopez and P. L. Gammel
Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974
P. C. Canfield and S. L. Bud'ko
Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011
Received 27 March 2001; published 15 August 2001
Neutron measurements show that superconducting ErNi2B2C ( TC = 11 K) develops antiferromagnetic spin density wave magnetic order ( TN = 6 K), which squares up with decreasing temperature yielding a series of higher-order magnetic Bragg peaks with odd harmonics. Below TWFM = 2.3 K where magnetization indicates a net moment develops, even-order Bragg peaks develop which low field ( ∼3 Oe) polarized beam measurements show are magnetic in origin. The data directly demonstrate the existence of a net magnetization with a periodicity of 20a, confirming the microscopic coexistence of spontaneous weak ferromagnetism with superconductivity.
©2001 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v87/e107001
DOI: 10.1103/PhysRevLett.87.107001
PACS: 74.25.Ha, 74.70.Dd, 75.25.+z
* Present address: Department of Nuclear Engineering, Korea Advanced Institute of Science and Technology, Taejon, 305-701, Korea.
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