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Science 7 February 1992:
Vol. 255. no. 5045, pp. 703 - 705
DOI: 10.1126/science.255.5045.703
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Articles

Antiferromagnetism in Pressure-Amorphized Fe2SiO4

M. B. KRUGER 1, R. JEANLOZ 2, M. P. PASTERNAK 3, R. D. TAYLOR 3, B. S. SNYDER 4, A. M. STACY 4, and S. R. BOHLEN 5

1 Department of Physics, University of California, Berkeley, CA 94720
2 Department of Geology and Geophysics, University of California, Berkeley, CA 94720
3 Physics Division, Los Alamos National Laboratory, Los Alamos, NM 87545
4 Department of Chemistry, University of California, Berkeley, CA 94720
5 U.S. Geological Survey, Menlo Park, CA 94025

Amorphous Fe2SiO4 synthesized at elevated pressures exhibits a Néel transition at a temperature identical to that observed in the crystalline form, TN = 65 (±2) kelvin at zero pressure. This behavior contrasts sharply with observations on other disordered systems, such as spin glasses, which characteristically exhibit strong "frustration" of the spins and consequent marked suppression of the Néel transition.

Submitted on October 4, 1991
Accepted on November 23, 1991


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Magnetic excitations and heat capacity of fayalite, Fe2SiO4.
M.C. Aronson, L. Stixrude, M.K. Davis, W. Gannon, and K. Ahilan (2007)
American Mineralogist 92, 481-490
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